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Home My WebLink About1.03 Supplemental Information - Geologyo SECTION 4:70 (A) SU PPLEM ENTAL INFORMATION GEOLOGY Section 4.7O(A&B) SOILS AND GEOLOGY Two soils and geology analyses have been completed on the site' The first report titled "p?eliminary Geotechnical Study, Proposed Residential otvenpment, Elk Springs Ranch Lower Bench Area, County Road 114, Garfield County, Coioraio," was prepared by HP Geotech and is dated November 11, 2005. The study included five test borings spaced throughout thi property and presented preliminary design recommendations for foundations and roadwaYs. The second study, titled "supplemental Geotechnical Study, Prop-osed Residential Development, Elk'springs Ranch Lower_Bench Area, county Road 114, Garfield County, Coiorado," wis also prepared by HP Geotech and is dated April 10, 2006: Subsoil conditions were investigated by drilling 12 additional exPloratory borings. It further presents the general subsoil conditions, surficial geology, site lrading and drainage c6nsiderations and prelim!n"ry foundation recommendations. -The repoft concludes nDevelopment of the project should be feasible based on geotechnical conditions, however there are several conditions of a geolog-ic nature that could affect the proposed development and which should be-considered in project planning and design." Preliminary design recommendations in the report-address concerns related to potentially hydiocompressive soils and provide recommended rnitigation techniques' The potential effect of moisture sensitive soils will be mitigated by d.irecting surface drainage awiy from the buildings. Under-drain systems will be used to protect baslment levels or retaining walls from wetting and hydrostatic pi.rrr... The conditions at each individual building site will be evaluated at the time of construction to determine if additional measures are warranted' The interior roadways will be designed in accordance with the recom- mendations of the i'olts repot. T[e road section will consist of nine inches of base course and three incires of asphalt. The sub-grade will be sub- excavated and re-compacted to a depth of six feet before placing the base course and asphalt. It is also recommended that water and sewer lines within the roadways be constructed using restrained joint pipe to limit the potential for joint separation in the event of excessive settlement. The report fufther evaluated the conditions on the propefi relative to slope instabiiily, sinkholes flow and the potential for strong earthquake related ground shaking. This property, as well as the surrounding afeat fa.lls within seismic Risk Zone 1 in terms of earthquake potential. All of the building construction within this development will be required to meet the requirements of the Uniform Building Code for this seismic zone. Further design recommendations for foundations, retaining wal-ls and floor slabs are contained within the geotechnical reports. Test hole logs, swell- consolidation test results, and gradation test iesults can be found within the full text of the reports which are included in this application' - lr 'r HEPWORTH. PAWLAK GEOTEC HNICAL Hepwonh-Pau'lak Geotechnical, lnc. 5020 Countv Road 154 Glenwood Springs, Colorado 81601 Phone, 970-945'i988 Fax:970-945'8454 email: hpgeo@hpgeotech.com SUPPLEMENTAI GEOTECHNICAL STUDY PROPO SED RES IDENTIAL DE\'ELOPX{ENT ELK SPRTNGS RANCH LOWER BENCH AREA COI.INTY ROAD I14 GARFTELD COUNTY, COLORADO JOB NO. rOs 652 APRIL 10,2006 PREPARED FOR: JOIIN A. ELMORE 2929 COUNTY ROAD 114 GLENWOOD SPRINGS, COLORADO 81601 H parker 303-g4l-711g . Colorado Str'rrings 719-633-5562 ' Sih'erthorne 970'468-1989 T-l ;li ,lI TABLE OF CONTENTS PURPOSE AND SCOPE OF STUDY PROPOSED CONSTRUCTION SITE CONDITIONS..... FIELD EXPLORATION...... SUBSURFACE CONDITIONS ENGINEERING ANALYSIS PRELIMINARY DESIGN RECOMMENDATIONS ........ FOUNDATIONS FOLINDATION AND RETAINING WALLS FLOOR SLABS TINDERDRAIN SYSTEM.. SITE GRADING.. SURT'ACE DRAINAGE .............. LIMTATIONS. -2- -3- 2- 4- 4- 6- 7- 8- -4- -8- -9- -10r REFERENCE ........ FIGIJRE i _ LOCATION OF DGLORATORY BORINGS FIGURES 2 T}IROUGH 4. LOGS OF EXPLORATORY BORINGS F]GURE 5 - LEGEND AND NOTES FIGIIRES 6 THROUGH 12 _SWELL.CONSOLIDATION TEST RESULTS TABLE 1- SUMMARY OF LABORATORY TEST RESULTS - ir - 1 -1- I a PURPOSE AND SCOPE OF STI]DY This report presents the results of a supplemental geotechnical study for the proposed residential development at Elk Springs Ranch Lower Bench Area, County Road 114' Garfield County, Colorado. The project site is shown on Figure 1' The purpose of the study was to develop lecorlmendations for foundation and grading designs' The study was conducted as a supplanent to our proposal for professional engineering services to John Elmore dated July 7, 2OO5.A preliminary geotechnical study and geologic conditions assessment was conducted for the schematic subdivision plan (Hepworth- Pawlak Geotechnicai, 2005). A field exploration proglam consisting of additional exploratory borings was conducted to obtain information on the general subsurface conditions' Samples of the subsoils obtained during the field exploration were tested in the laboratory to determine their classification, compressibility or expansion potantial and other engineering characteristics. The results of the field exploration and laboratory testing were analyzed to develop recommendations for preliminary foundation design of the proposed buildings and for the subdivision grading. This report sumrnarizes the data obtained during this study and presents our conclusions, design recommendations and other geotechnical engineering considerations based on the proposed construction and the subzurface conditions encountered. PROPOSED CONSTRUCTION The preliminary schematic plan was being developed at that time of our study' In general, it is an g0 lot, singre family residential subdivision with a network of streets and utilities as shown on Figure 1. Since our initial study, the plan has been changed' mainly to the west of the main entrance. We understand that the streets and lots are generally proposed to follow the terrain but considering the variable relief and closely spaced lots, relatively extensive grading could be required Job No. 105 652 c$tecfr a If building types, Iocations or development plans change significantly from those described above, we should be notified to re-evaluate the recorrmendations contained in this report. SITE CONDITIONS The terrain across the project site is variable and the general topography is shown by the contour lines on Figure 1. County Road 114 borders the property on the north and east. Ground suface slopes in the east and west building areas are typically moderate and do not exceed about 10 percent in most areas. A steep river terrace escarpment about 100 feet high with slopes of about 60 percent is located near the western property boundary. The moderate sloping bench transitions to hitly terrain to the north, south and east of the properfy. Slopes in these areas are typically between about 25 and 60 percent. Vegetation consists of mostly grass and sagebrush with juniper trees, sage brush and grass on the adjacent hills. FIELD EXPLORATION The field exploration for the project was conducted between January 9 and March 9, 2006. Twelve exploratory borings (Borings 6 through 17) were drilled at the locations shown on Figure I to evaluate the subsurface conditions. The borings were advanced with 4 inch diameter continuous flight auger powered by CME-45 and CME-55 drill rigs mounted on all terrain vehicles. The borings were logged by a representative of Hepworth-Pawlak Geotechnical, lnc. Borings 1 through 5 were drilled as part of the preliminary study and their locations are also shown on Figure 1- Samples of the subsoils were taken with a l3A inch and 2 inch I.D. spoon samplers. The samplers were driven into the subsoils at various depths with blows from a 140 pound hammer falling 30 inches. This test is similar to the standard penetration test described by ASTM Method D-l586. The penetration resistance values tre an indication of the relative density or consistency of the subsoils and hardness of the bedrock. Depths at which the samples were taken and the penetration resistance values are shown on the o a Job No. 105 652 cE8tecrr ,t -J- LogsofExploratoryBorings,Figure2through4.Thesampleswereretumedtoour laboratory for review by the project engineer and testing' '- SUBSURFACE CONDITIONS Graphic logs of the subsurface conditions encountered at the site are shown on Figures 2 through 4. The subsoils, below a thin topsoil root zone, consist of a variable depth of inter-layered silt, sand and clay alluvial deposits typically overlying very hard siltstone/sandstone bedrock. The aluviar soils were encountered to a depth of 48 feet in the western part and to a depth of 59%feet in the east part of the properry in the borings drilled for the preliminary study. At the borings located in the cenffal part of the property,siltstoneisandstoneandgypsumbedrockoftheEagleValleyEvaporitewas encountered below the alluvial/colluvial soils at depths between 7 and 19 feet' The bedrock was tlpically very hard and did not appear to contain voids' At Boring 15' about lTfeetofsoftandweatheredgypsumwasencounterbetweenharderrocklayersbutdid not appear to contain voids. Borings 16 and 17, drilled nearby did not encounter the g)psum Laboratory testing performed on samples obtained from the borings included natural moisture content and density, liquid and plastic limits and finer than sand size gradation analyses. Results of swell-consolidation testing, presented on Figures 6 through 12' indicate the alluvial soils within about the upper 10 feet are typically hydrocompressive and moderately to higtlv compressible under load after wetting' Sorne of the clay soils with depth typically showed a minor to moderate expansion potential when wetted under relatively light loading. The laboratory test results are summarized in Table 1' Free water was not encountered in the borings and the subsoils and bedrock were relatively dry. The gypsum at Boring 15 was moist' JobNo.105652 c$tecrr 4 ENGINEERING ANALYSIS Development of the project as proposed should be feasible based on geotechnical conditions. The alluvial/colluvial soils encountered in the borings have variable settlement/heave characteristics. The shallow soils tend to collapse (settle under constant load) when wetted. The depth of collapsible soils is expected to be variable across the project site but appears to be on the order of 8 to 15 feet based on the laboratory testing. The amount of settlement will depend on the depth of the compressible soils and the wetted depth below the foundation. The deeper soils that show some expansion potantial when wetted are expected to not be t5pically encountered in shallow excavations and should not impact shallou,foundation design. Deep foundations may require mitigation of the expansive soils including subexcavation or minimum dead loads. The settlementftreave potential and risk of excessive building distress can be reduced by compaction of the soils to a certain depth belou, the foundation bearing level and by heavily reinforcing the foundation to resist differential settlements. The compaction could also extend to belou, driveway and utility areas. Stnrctural fill sections are expected to be relatively minor but relatively deep structural fills will have some potential for long term settlement. Proper grading and compaction as presented belou, in ^S;le Gradingwill help reduce the settlernent risks. A heavily reinforced mat foundation designed for large differential settlements could also be used to reduce the settlernent risk. Recommendations for design of the proposed development are presented below. When the building plans have been developed, we should review the information for compliance with our recommendations. PRELIMINARY DES I GN RECOMMENDATIONS FOTINDATIONS Considering the subsurface conditions encountered in the exploratory borings, the variable terrain and the residential proposed construction, we recolnmend the buildings be founded with spread footings. The feasibility of footings placed on the natural soils Job No. lO5 652 G$'tec*1 -5- should be evaluated by either additional subsurface exploration or evaluation of the bearing conditions at the time of construction. If mat foundations are considered for building support, we should be contacted for additional recommendations' The design and construction criteria presented belou' should be observed for a spread footing foundation sYstem. 1)Footings placed on the natural soils or at least 3 feet of compacted fill depending on the results of additional exploration, should be designed for an allowable bearing pressure of 1,500 psf. Based on experience, we expect initial settlement of footings designed and constructed as discussed in this section will be about 1 inch or less. Additional differential settlement between about I to 2 inches could occur if the soils are wetted. The footings should have a minimum width of 20 inches for continuori's walls and 2 feetfor isolated pads. If expansive soils are encountered at bearing level, nrurower footings may be feasible' Exterior footings and footings beneath unheated areas should be provided with adequate soil cover above their bearing elevation for frost protection' Placement of foundations at least 36 inches below exterior grade is typically used in this area. The foundation should be constmcted in a'box-like" configuration rather than with isolated footings. The foundation walls should be heavily reinforced top and bottom to span ]ocal anomalies and limit the effects of differential movements, such as by assuming an unsupported length of at least 14 feet. Foundation walls acting as retaining structures should also be designed to resist lateral earth pressures as discussed in the "Foundation and Retaining Walls" section of this report' ' The topsoil and any loose or disturbed soils should be removed' In areas where the bearing soils will be compacted, the soils should be subexcavated as needed to provide at least 3 feet ofstructural fiIl below the footing bearing level compacted to at least 98% of the maximum standard Proctor density within 2 percentage points of optimum moisture content. Where footings are placed on the natural soils, the exposed soils 2) 3) s) 4) JobNo. 105 652 c$tecrr -6- 6) should be fuither evaluated for settlementftreave potential and should be moistened and compacted in footing areas. An exploratory boring should be drilled on each of the lots located along the bedrock knolls to further evaluate bedrock conditions and possible soft gypsum or subsurface voids for the individual lot owners A representative of the geotechnical engineer should evaluate compaction of the fill materials and observe all footing excavations prior to concrete placement for bearing conditions. FOTINDATION AND RETAINING WALLS Foundation walls and retaining structures which are laterally supported and can be expected to undergo oniy a slight amount of deflection should be designed for a lateral earth pressure computed on the basis of an equivalent fluid unit weight of at least 55 pcf forbackfillconsistingoftheon.sitesoi1s'CantileveredretainingStructureswhichare separate frorn the buildings and can be expected to deflect sufficiently to mobilize the full active earth pressure condition should be designed for a lateral earth pressure computed on the basis of an equivalent fluid unit weight of at least 45 pcf for backfill consisting of the on-site soils. All foundation and retaining structures should be designed for appropriate hydrostatic and surcharge pressgres such as adjacent footings, traffic, construction materials and equipment. The pressures recornmended above assume drained conditions behind the walls and a horizontal backfill surface. The buildup of water behind a wall or an upward sloping backfill surface will increase the lateral pressure imposed on a foundation wall or retaining structure. An underdrain should be provided to prevent hydrostatic pressure buildup behind walls. Backfill should be placed in uniform lifts and compacted to at least 90% of the rnaximum standard proctor density at a moisture content near optimum. Backfill in pavernent and walkway areas should be compacted to at least 95%o of the maximum standard Proctor density. Care should be taken not to overcompact the backfill or use large equipment JobNo.105652 eeftea'r 7- near the wall, since this could cause excessive lateral pressure on the wall' Some settlement of deep foundation wall backfill should be expected' even if the material is placedcorrectly,andcouldresultindistresstofacilitiesconstructedonthebackfill' The lateral resistance of foundation or retaining wall footings will be a combination of the sliding resistance of the footing on the foundation materials and passive earth pressure against the side of the footing. Resistance to sliding at the bottoms of the footings can be calculated based on a coefficient of friction of 0.35' Passive pressure of compacted backfill against the sides of the footings can be calculated using an equivalent fluid unit weight of 300 pcf. The coefficient of friction and passive pressure values recommended above assume ultimate soil strength. Suitable factors of safety should be included in the design to limit the strain which will occur at the ultimate strength, particularly in the case of passive resistance. Fiil placed against the sides of the footings to resist lateral loads should be compacted to at leastglo/oof the maximum standard Proctor density at a moisture content near oPtimum' FLOOR SLABS The natural on-site soils, exclusive of topsoil, and compacted sffuctural fill can be used to support liglrtly loaded slab-on-grade construction. The upper natural soils are compressible u,hen wetted and there could be some post-construction settlement' To reduce the effects of some differential movement, nonstructural floor slabs should be separated from all bearing walls and columns with expansion joints which allow unrestrained vertical movement. Floor slab control joints should be used to reduce damage due to shrinkage cracking. The requirements for joint spacing and slab reinforcement should be established by the designer based on experience and the intended slab use. A minimum 4 inch layer of free-draining gravel should be placed beneath basement level slabs to facilitate drainage. This material should consist of minus 2 inch aggregate with at least 50% retained on the No' 4 sieve and ]ess than 2% passing the No' 200 sieve. Job No. 105 652 c$tecrr -8- All fill materials for support of floor slabs above footing bearing level should be compacted to at least 95o/o of maximum standard Proctor densit5, at a moisture content near optimum. Required fill can consist of the on-site soils devoid of vegetation, topsoil and oversized rock. LINDERDRAIN SYSTEM Although free water was not encountered during our exploration, it has been our experience in the area that local perched groundwater can develop during times of heavy precipitation or seasonal runoff. Frozen ground during spring runoffcan create a perched condition. We recommend below-grade construction, such as retaining walls and basement areas, be protected from wetting and hydrostatic pressure buildup by an underdrain system. An underdrain should not be provided around shallow crawlspace areas and floor slabs constructed near finish ground surface. If installed, the drains should consist of drainpipe placed in the bottom of the wall backfill surrounded above the invert level with free-draining granular material. The drain should be placed at each level of excavation and at least 1 foot below lowest adjacent finish gradeand sloped at a minimum 1%o toa suitable gravity outlet. Free-draining granular material used in the underdrain system should contain less than 2% passing the No. 200 sieve, less than 50% passing the No. 4 sieve and have a maximum size of 2 inches. The drain gravel backfill should be at least 7r/z feet deep. An impervious membrane, such as a 20 mll PVC liner, should be placed beneath the drain gravel in a trough shape and attached to the foundation wall with mastic to prevent wetting of the bearing soils. SITE GRADING A moderate amount of grading could be needed as part of the proposed development plan due to the variable terrain. In addition, removal and replacement of the alluvial/colluvial soils compacted is recommended to in roadway areas to reduce the risk of excessive differential settlements and distress. The structural fill should extend to at least 6 feet below design subgrade level of the access roads. The water and sewer pipe joints in the JobNo.105 652 c,&Etecr, -9- roadways should be mechanically restrained to reduce the risk ofjoint separation in the event of excessive settlement. Excavation and compaction below footing bearing level may not be needed depending on the results of additional site-specific exploration and analysis. The stmctural fill materials below footing bearing level should be compacted to at least 98o/o of themaximum standard Proctor density within 2 percentage points of optimum moisture content. Prior to filI placement, the subgrade should be carefully prepared by removing the vegetation and topsoil and compacting to at least 95o/o of the maximum standard Proctor density at near optimum moisture content' The fill should be benched into slopes that exceed 2oo/o grade. Based on our experience, shrinkage of the uppelalluvialsoilsduetocompactionisexpectedtobeabout20%. permanent unretained cut and fiIl slopes should be graded atZhoizontal to I vertical or flatter and protected against erosion by revegetation or other means' This office should review site grading plans for the project prior to construction' SURFACE DRAINAGE Precautions to prevent wetting of the bearing soils such as Proper backfill construction' positive backfil] slopes, restricting landscape irrigation and use of roof gutters need to be taken to help limit settlement and building distress. The following drainage precautions should be observed during construction and maintained at all times after each residence has been comPleted: 1) lnundation ofthe foundation excavations and underslab areas should be avoided during construction' 2) Exterior backfill should be adjusted to near optimum moisture and compacted to at least 95oh of themaximum standard Proctor density in pavement and slab areas and to at least 90% of the maximum standard Proctor density in landscape areas' 3) The ground surface surrounding the exterior of the building should be sloped to drain away from the foundation in all directions' The slope should be at least 12 inches in the first 10 feet in unpaved areas and at least 3 inches in the first 10 feet in paved areas. Drain gravel of retaining u'alls Job No. 105 652 c$tech -10- 4) should be capped with at least2 feet of the on-site soils to reduce surface water infiltration. Roof gutters should be provided with dou,nspouts that discharge beyond the limits of the foundation wall backfill. Landscaping which requires regular hearry irrigation, such as sod, should be located at least 5 feet from foundation walls. Consideration should be given to use of xeriscape to reduce the potential for wetting of soils below the building caused by irrigation. 5) LIMITATIONS This study has been conducted in accordance with generally accepted geotechnical engineering principles and practices in this area at this time. We make no warranty either express or implied. The conclusions and recorlmendations submiued in this report are based upon the data obtained from the exploratory borings drilled at the locations indicated on Figure 1, the proposed type of construction and our experie,nce in the area. Our services do not include determining the presence, prevention or possibility of mold or other biological contaminants (MOBC) developing in the future. If the client is concerned abor.lt MOBC, then a professional in this special field of practice should be consulted. Our findings include interpolation and extrapolation of the zubsurface conditions identified at the exploratory borings and variations in the subsurface conditions may not become evident until excavation is performed. If conditions encountered during construction appear different from those described in this re,port, we should be notified so that re-evaluation of the recorlmendations may be made. This report has been prepared for the exclusive use by our client for planning and preliminary design purposes. We are not responsible for technical interpretations by others of our information. As the project evolves, we should provide continued consultation and field services during construction to review and monitor the irnplementation of our recorrmendations, and to verifu that the recommendations have been appropriately interpreted. Significant design changes may require additional analysis or modifications to the recomrnendations presented herein. We recornmend on- Job No. 105 652 cEFtecrt - 11- site observation of excavations and foundation bearing strata and testing of structural fill on aregularbasis by a representative ofthe geotechnical engineer. Respectfully Submitted, HEPWORTH - PAWLAK GEOTECHNICAL, INC. Steven L. Pawlak, P Reviewed bY: Daniel E. Hardin, P.E SLP/ksw cc Schmueser Gordon Meyer - Attn: Dean Gordon Noble Design Studio - Attn: Robert Adams Kjell Vanghagen REFERENCE Hepworth-pawlak Geotechnical,2OO5, Preliminaty Geotechnical Study, Proposed Residential Det elopntent, Elk Springs Ranch Lower Bench Area, County Road 114, Garfield Couttty, Colorado. Job No. 105 652 dated Novernber 11, 2005' Job No. lOS 652 c$tech t IN 2 x t rit! L 4 tI't: ING 3 ,t 16 ri INGBOR ii 't,O BOR ING 51 i! ftl .it i__i I ii ff i-.$:-i i!'t: ;i '-tliir i,_Er.i ci 4 iit B ;i i-l-l iit: ri TI APPROX]MATE SCATE 1" = 300' l.lit rr i-----i,:., .i i-:-;: t, t: 5NGBOR ll ,b i.t l.l i i1 7 o, :. ':.. uAt! BOHING 1O t il BORING I ir E ,' , ',. i: ar RING 13 F]GURE 1LOCATION OF EXPLORATORY BORINGSHP@5t--=h105 652 ;i..il:( ,.-l::.1.... I.tl I ;l 0 5 ebntNlo o ELEV.= 6345' BORING 7 ELEV.: 6295' 30112 BORING 8 ELEV.= 6270' BORING 9 ELEV.= 6235' BORING 1O ELEV.:6230' 0 5 oo) LL I -cooo 0)o LL Isooo 10 15 20 14112 WC=6.8 DD=109 48112 51112 WC=19.7 DD=110 5012 WC=21.6 DD=103 -200=89 40112 WC=7.3 DD7108 21112 WC=9.8 DD=107 -200=93 501't2 WC=9.0 DD=120 27112 WC=6.3 DD=112 60112 5014 WC=7.0 DD=120 -20o=70 70/12 WC=5,1 DD=125 42t12 s0112 WC=9.9 10 DD='t 19 24112 WC=9.2 DD=114 -200=89 50/6 WC=3.9 DD=116 50/6 WC=8.0 DD=120 -20o=87 50/6 15 50/3 52112 WC=7.4 DD=115 Note: Explanation of symbols is shown on Figure 5 20 Figure 2LOGS OF EXPLORATORY BORINGS HEPwoFrr+PAurx 1 05 652 BORING 11 ELEV.= 6270' BORING 12 ELEV.= 6260' BORING 13 ELEV.= 6240' BORING 14 ELEV.: 6245' BORING 15 ELEV.= 6275' 0 0 I I I 5 27011 J5 40112 WC=8.1 DD=109 22/12 WC:7.6 DD=113 -200=69 50/6 WC=4.4 DD=124 -200=31 50/3 9112 WC:6.4 DD=102 -200=86 't8112 WC:6.5 DD=110 50/6 16112 WC=6.3 DD=105 -200=80 14/12 WC=5.0 DD=106 1s/6,30/6 WC=3.6 DD=112 65112 56112 WC:7.6 DD=117 -200:83 LL=31 Pl=14 50t12 WC=10.3 10 DD=125 38112 WC=8.5 DD=118 50/6 WC=8.3 DD=124 -200=88 20 20 oo LL I .Caoo 10 15 25 30 35 s0/3 5014 Note: Explanation of symbols is shown on Figure 5' 5014 WC=5.6 DD=105 -20o=67 3112 5112 50/3 15 35 Figure 3 o)(I) LL (!o 25 30 40 LOGS OF EXPLORATORY BORINGS 1 05 652 40 0 5 10 ,15 20 30 35 q) o)lJ- I o o)o 25 40 40 BORING 16 ELEV.= 6292' BORING 17 ELEV.= 6267' 0 E 50112 WC=10.8 DD= 110 -200=83 50/3 50112 WC=7.4 DD=115 -200=91 53/4 5019 WC=5.5 DD=115 -ZCf=82 4915 5113 53/5 5412 WC=8.1 DD=126 -200=64 $n 5U9 4913 4219 54/3 Note: Explanation of symbols is shown on Figure 5 10 15 20 30 35 o(DII I !ooo 25 Figure 4LOGS OF EXPLORATORY BORINGS 105 652 LEGEND: n n w W W ffi F I 8/1,2 TOPSOIL; sandy silt, root zone, brown S|LT AND CI-AY (ML-CL); slightly sandy to sandy, stiff to very stifi, slightly moist, light brown, slightly calcareous CLqy (CL); slighly sandy to sandy, silty, stiff to very stitf, slightly moist, light brown to brown, low plasticity, slightly calcareous. S|LT AND SAND (ML-SM); scattered gravel to gravelly, very stiff to hard, slightly moist, light brown, subangular basalt rock, slightly calcareous. SAND AND GRAVEL (SM-GM); silty, sandy, scattered cobbles, sandy silt layers, medium dense, slightly moist, brown, subangular basalt rock. WEATHERED STLTSTONE AND GYPSUM; soft, moist, white. Eagle Valley Evaporite. (Boring 15 only) S|LTSTONE/SANDSTONE BEDROCK; some gypsum, very hard, dry, grey. Eagle Valley Evaporite Relatively undisturbed drive sample; 2-inch l.D. california liner sample Drive sample; standard pebetration test (STP), 1 3/8 inch LD. split spoon sample, ASTM D1586. Drive sample blow count; indicates that 18 blows of a 140 pound hammer falling 30 inches were required t6 drive the California or SPT sampler 12 inches. I Disturbed bulk samPle. NOTES: 1 . Borings 6 through 15 were drilled on January 9 and 10, 2006 and Borings 16 and 17 were drilled on March 9, 2006 with 4-inch diameter continuous flight power auger. 2. Locations of exploratory borings were measured approximately by pacing from features shown on the site plan provided. 3. Elevations of exploratory borings were estimated from contours shown on the site plan provided. 4. The exploratory boring locations and elevations should be considered accurate only to the degree implied by the method used. 5. The lines between materials shown on the exploratory boring logs represent the approximate boundaries between materialtypes and transitions may be gradual' 6. No free water was encountered in the borings at the time of drilling or when checked one day later. Fluctuation in water level may occur with time. 7. Laboratory Testing Results: WC : Water Content (%) DD = Dry Density (Pcf) -2OO: Percent passing No. 200 sieve LL = Liquid Limit (%) Pl = Plasticity lndex (%) Figure 5LEGEND AND NOTES HEPwoFil+PAwl-Ax 105 652 Nco'6 c (Uox LLI Icoa U)(D o EoO 0 1 2 0 2 Ico'6c(Eoxtrl Ico'6 ooo EoO 0.1 1.0 APPLIED PRESSURE - ksf APPLIED PRESSURE'ksl 10 10 100 Moisture Content = 6.8 Dry DensitY = 109 Sample of: Sandy Silty Clay From: Boring 6 at 4 Feet percent pcf (( \t \) Expansion upon wetting Moisture Content = 19.7 Dry DensitY = 110 Sample of: Sandy Silty Clay From: Boring 6 at 14 Feet percent pcf t-t \) No movement upon wetting Figure 6SWELL.CONSOLIDATION TEST RESULTS HEPWoRTT+PAWI.AK 10s 652 0.1 1.0 100 bs Co'6 c6ox TJJ I Co'6 (r)oo EoO 0 2 0.1 1.0 10 100 APPLIED PRESSURE - ksf 2 ac .9 U'C6ox TIJ I Coao(D o Eo C) 0 2 10 APPLIED PRESSURE - ksf Moisture Content = 3.9 Dry DensitY = 116 Sample of: Sandy Clay with Gravel From: Boring 7 at 14 Feet percent pcf ]N +\ \) Expanston upon wetting Moisture Content : 9.0 Dry DensitY = 120 Sample of: Sandy Clay with Gravel From: Boring I at 14 Feet percent pcf \\ )i \) Expdnsion upon wetting Figure 7SWELL-CON SOLIDATION TEST RESULTS GEIOTECHNICAL 1 05 652 0.1 1.0 100 1 1 .( 0 a coa U)q) o Eoo 1 2 3 4 0.1 1.0 10 100 APPLIED PRESSUHE - KSf bec .9 U'c (UoxllJ I C .o ct)aoo Eoo 1 0 1 10 APPLIED PRESSURE - ksf Moisture Content = 7.4 percent Dry Density = 115 Pcf Sample of: Sandy Silty Clay with Gravel From: Boring 8 at 19 Feet ) Settlement -uponwetting \) Moisture Content : 6.3 Dry DensitY : 112 Sample of: Sandy Clay From: Boring I at 4 Feet percent pcf \ )i ) Expansion upon wetting 0.1 1.0 100 Figure ISWELL-CONSOLI DATION TEST RESULTS HEPWOF'T}}PAWLAX 105 652 2 0 bs Co'6 C(0ox [l-, co'6 a o)o EoO 2 3 4 5 4 3 2 10010 10 APPLIED PRESSURE - ksf APPLIED PRESSURE - ksf 1.00.1 1 0 1 2 Ee CoaC(Eox UJ Ico'6a(Do EoO Moisture Content : 5.1 Percent Dry Density = 125 Pcf Sample of: Very Sandy Clay with Gravel From: Boring 9 at 19 Feet Expansion upon wetting ( \ ) \\ ) \ \ () ). Moisture Content = 9.9 Dry DensitY : 119 Sample of: Sandy Clay From: Boring 10 at 9 Feet percent pcf \) Expansion upon wetting \ \ \ \ ) \) Figure ISWELL-CONSOLIDATION TEST RESULTS GEOTECHNICAL 1 05 652 0.1 1.0 100 1 1 Moisture Content = 8.5 Dry Density : 118 Sample of: Sandy Clay From: Boring 13 at 9 Feet percent pcf Expansion upon wetting I \ \) 3 2 0 1 2 bS tr .oac(6 o_xul Ic .oao o)o Eoo ac .oaC(Uox TU c .oaooo EoO 0 2 0.1 1.0 APPLIED PRESSURE - KSf APPLIED PHESSURE - ksf 10 10 100 3 4 Moisture Content : 5.0 Dry DensitY : 106 Sample of: Sandy ClaYeY Silt From: Boring 14 at 9 Feet percent pcf ,_ Compression _upon wetting ( () Figure 10SWELL-CONSOLIDATION TEST RESULTS 1 05 652 0.1 1.0 100 ) 1 1 ) I G 0 1 2 \oo\c -ooc(6 o-xIJ Icoa U) o)o Eo() 10010 10 APPLIED PRESSUHE - ksf APPLIED PRESSURE - ksf 1.0 1.0 0.1 1 0 \oo\c .o U)tr(6ox LU Ic .o U)ooo EoO 2 Moisture Content : 8.1 Dry DensitY = 109 Sample of: $sp16y Silty Clay From: Boring 11 at 3/zFeet percent pcf \ )N \ \ txpansron upon wetting \) Moisture Content = 6.5 Dry DensitY : 110 Sample of: Sandy Silt and Clay From: Boring 12 al9 Feet percent pcf t I \ \) Expansron upon wettinO SWELL-CONSOLIDATION TEST RESULTS Figure 10c$tecrr HEPwoRm+PAwllx GEorEcHNlcAL 1 05 652 0.1 100 1 1 I .l \ .l 2 ;sc .oac(Uox IJJ Ico'6ooo Eo C) 1 0 1 2 0 0.1 1.0 10 10 APPLIED PRESSURE - ksf APPLIED PRESSURE - ksf 100 2 3 4 beco'dic(EoxtU I Co'6 (t) 0) o_ Eoo Moisture Content : 8.5 Dry DensitY : 118 Sample of: Sandy Clay From: Boring 13 at 9 Feet percent pcf Expansion upon wetting ( ) \ \) Moisture Content : 5.0 Dry DensitY : 106 Sample of: Sandy Clayey Silt From: Boring 14 at 9 Feet percent pcf t- Compression -uponwetting ( \ () Figure 11SWELL-CONSOLIDATION TEST RESULTS15 652 0.1 1.0 100 1 t -l \ 0 1 2 .) bs c .9aa o)o Eo O 4 2 0.1 1.0 APPLIED PRESSUHE - ksf APPLIED PRESSURE - ksl 10 10 100 bSc .oac(Uoxl.tl Ico'-aaq) o Eoo 0 1 2 Moisture Content = 3.6 Dry DensitY : 112 Sample of: Very Silty Sand with Gravel From: Boring 14 at 14 Feet percent pcf ) Compression upon-wetting I \) Moisture Content = 10.3 Dry DensitY : 125 Sample ot: Sandy Clay From: Boring 15 at9 Feet percent pcf ( \ \ \ )S ).....-, txpanslon upon wetting Figure 12SWELL-CONSOLIDATION TEST RESULTS 1 05 652 0.1 1.0 100 Ill \ HEPWORTH.PAWLAK GEOTECHNICAL, INC. TABLE 1 SUMMARY OF LABORATORY TEST RESULTS Job No. 105 652 Pa 1of 3 NATURAL MOISTURE CONTENTBORINGSDEPTH NATURAL DRY DENSITY TION PERCENT PASSING NO. 200 SIEVE GRAVEL (o/o) SAND (oh) UNCONFINED COMPRESSIVE STRENGTH UQUID PLASTIC INDEXLIMIT SOIL OR BEDROCK TYPE 6 4 6.8 109 Sandy silty clay t4 19.7 110 Sandy silty clay 7 19 2t.6 103 89 Sandy clay with gravel 9 9.2 lt4 89 Sandy silty clay l4 3.9 116 Sandy clay with gravel 8 4 7.3 108 Sandy silt and clay 9 9.8 to7 93 Slightly sandy silty clay t4 9.0 t20 Sandy clay with gravel 9 10 19 7.4 r15 Sandy silty clay with gravel 4 6.3 tt2 Sandy clay t4 7.0 120 70 Sandy silty clay r9 5.1 125 Very sandy clay wfth gravel 9 9.9 119 Sandy clay 14 8.0 120 87 Sandy clay rl SAMPLE LOCATION I HEPWORTH.PAWLAK GEOTECHNICAL, INC. TABLE 1 SUMMARY OF LABORATORY TEST RESULTS lob No. 105 652 Pa e2of3 ATTERBERG UMITSGRADATIONSAMPLE LOCATION (o/o) PLASTIC INDEX UNCONFINED COMPRESSIVE STRENGTH SOIL OR BEDROCK TYPE SAND (o/o) PERCENT PASSING NO. 200 SIEVE (o/o) LIQUID LIMIT (ocf) NATURAL DRY DENSITY GRAVEL (o/o) BORINGS (ft) DEPTH ( o/o) NATURAL I MOISTURE I CONTENT 11 Sandy silty clay8.1 1093Vz Sandy silty clay Silty sand with gravel 698V27.6 113 3112413Vz4.4 Sandy silt and clay866.4 tozt24 11096.5 Sandy silt and clay 1181398.5 Sandy clay Sandy clay88t48.3 t24 Sandy silt and clay80105t446.3 Sandy clayey silt5.0 1069 Very silty sand with graveltt2l43.6 l5 l4 Sandy silty clay833t7.6 tt74 Sandy clay9r0.3 125 67 Weathered siltstone and gypsum195.6 105 (PSF) HEPWORTH-PAWLAK GEOTECHNICAL, INC. TABLE 1 SUMMARY OF LABORATORY TEST RESULTS lob No. 105 652 Pa e3of3 ATTERBERG LIMITS Sandy silt and clay SOIL OR BEDROCK TYPE LIQUTD LIMIT PLASTIC INDEX o/oo/o (PSF) UNCONFINED COMPRESSIVE STRENGTH PERCENT PASSING NO. 200 SIEVE ON GRAVEL (%) SAND (%) BORINGS DEPTH SAMPLE LOCATION NATURAL MOISTURE CONTENT NATURAL DRY DENSITY 8316510.8 110 Slightly sandy silt and clay Sandy silt and clay 91107.4 115 5.5 115 82 t7 15 Weathered siltstone64258.1 t26 ll H PAWLAK GEOTECHI'llC"L Heuuorth'Pas'lah Geotecirnical' lnc affi *Ts;}ff3, 8Jro,"ao s r oo I Phone: 9?0-945;?986 Fo.: 9?0'915'5454 email: hPgeo@hPgeotech'conr(l t HEPWORTH. PRELINItr{ARY GEO TECHNICAL STI]DY PROPOSEN NNSiONXTIAL DE\{ELOPMENT ELK SPRINGS RAN.}I LO\TIER BENCH AREA COUNTY ROAD 114 GARFIELD COTINTY, COLORADO JOB NO. 105 652 NO\'EMBER 11,2005 PREPARED FOR: JOHN A. ELMORE P'o' BOx 381 TIIRIGIITS\TILLE, N ORTE CAROLINA 28480 t Parker-lr..l.i-841'7]l9.Coioradr,S1rringsi19.{:.i.5567.Si!.vert1roine.97C-46E.]989 TABLE OF CONTENTS PURPOSEANDSCOPEOFSTUDY' """"""""""- I - SITECONDITIONS"""" """"""""""i """"""""""-2- REGIONAL GEOLOGIC SETTING """""""""""- 3 - SURFICIAL SOIL DEPOSITS""""""" """"""'- 4 - FORMATIONROCK""""' """"""'- 5 - FIELD DPLORATION """"""" """"- 6 - suBsuRFAcE CoNDITIONS"""""" """""""':":""""':""""""""""' GEOLOGIC SITEASSESSMENT ...-7 - FouNDATIoN nn'iffic colrpluol!:""'-"" """"""""- 7 - coNsrRucnoNnilirsp ilopsINsrABILIrY """"'7' sroRM wArER *'ii6#i'tli'r'oopnqc """""""'i"""- I n' REGIoNAL Bvapoii#;EioiMAfloN """"" -"""''""- e - EAITTI{QuAKEcoGFennTIoNs """""""'- 9 - ENGINEERD{G ANALYSIS """"""""" J PRELIMDIARY DES]GN RECOI\II\{ENDATIONS . FOUNDATIONS """"""' "i"""""""" ;;d'6;Tr oN AND RETATNING UIAI-LS """" ELOOR SLABS - 1I - ....- l2 - -13- SITE CRADING SURFACE DRAINAGE. PaWfvO]rIf SECTION REFEREI'icES ...""" """' F]GURE ] -WESTERN COLORADO EVAPOR]TE REG]ON FIGURE 2 - GEOLOGY T4AP AND DPLORATORY BORING LOCATIONS FIGURE 3 'LOGS OF DPLORATORY BORINGS FIGIJRE 4 . LEGE}'ID AND NOTES F]GURES 5 T}IROUGH 8 - SWELL'CONSOLIDATION TEST RESIILTS TABLE I- SI]MMARY OFLABORATORY TESTREST]LTS i PI.]RPOSE AND SCOPE OF STI]DY Thisrepoltpresentstheresu]tsofaprelimina4,geotechnica]srudr,fortheproposed residentia]deveiopmenralEl]<SpringsRaachLowerBenchArea,Coun!,Road774, Garfreld county, colorado. The project site is sho'*'tl on Figures I and 2' 'I\epurpose of thestudywastoer,a]ualethegeologicconditionsanddevelopleco[unelrdationsfor preliminary,foundationandgradingdesigns.Thestudywasconductedinaccordance withourproposalforprofessionalengineeringsen,icestoJohnEbnoredaledJulyT, 2005. Afieldexplorationproglamconsistingofageologicreconnaissanceandexploratory borings was conducred to obtain information on the site and general subsurface conditions. samples of the subsoils obtained during the field exploration were tested in the laboratory to determine their crassification, compressibiliqv or expansion potentiar and other engi:reering characteristics. The results of the field exploration and laboratory tesi-ngwereanall,zedforpossifo]gimractsfromt}egeologicconditionsandtodevelop recommendations for preliminary foundation design for tbe proposed buildings and the subdivision grading. This report summarizes the dau obtained druing this study and presents our conclusions, design recommendations and other geotecbnical engineering considerations based on the proposed construction and the subzurface conditions encountered' PROPOSED CONSTRUCTION At the time of this srudy, project pranning v,,as ir the preliminary srages. The preliminary schematic plan available al thal time is an 80 Iot' single fa:nily residential subdivision vvith a network of streets and utilities' It is expected the schematic plan will be modified asprojectplanninganddesignproceeds.Weunderstandthatthestreetsandlotsare generally proposed to folJou' tbe terrain but considering the variable relief and closely spaced lots, relativel)' extensive grading could be required't Job No. I 05 652 c^Secrr il:::'Tffi: ;;il::i,T iffi '.I,'Jl:'.-*J1,ffi: :Tffi::":' :: ]"'"j*' "o* O this rePort. SITE CONDITIONS The60acreproperD'islocatedonavalleysidebenchontheeastsideoftheRoaringFork RivervalleyaboulTmilessoutheastoftheGienwoodSpringstowDcenter,seeFigurel. The upland bench lies about 270 feetabove tbe river channel which is located about one- halfmiletothewestoftheploPerty.Thebenchislocatedaboutone-thirdoftheway betweentheva1leybottomandLosAmigosMesaatthetopofthevalleyside.The generaltopoglaphyintheprojectareaisshownbytheconlorrriinesonFigure2.Couty Roadl14bordersthepropeffyonthenorthandeast.Gror:ndslopesonthebenchare typicallymoderateanddonotexceedaboull0percentinmostareas'.Asteep,j@focrt high,riverterraceescarpmentwithslopesofaboul60percentislocatednearthewesfi.sns propertyboundary.Themoderateslopingbenchtransitionstohillyteraiatothenorth, south and east of the property. slopes in these areas are typically between about 25 and 60percent.Twopromi:renttopographicknobsstandaboul50feetabovethebenchinthe centra]partoftheproperty.AlldrainagestributarytotheproPerryareephemera]and onlyhavesurfaceflowfol]owingperiodsofhealyrainfallandsnowmelt.Mostaresmall and have basi::s that cover less than 40 acres' A relatively large ephemeral draiaage with anuPstreaflbasinthatcoversabout2l4acresenterstheproperlyfromthenorthanda secondrelativelylargeephemeraldrainagewithanupsteambasinthatcoversaboutT5 acresentersthepropertyfromtheeast.Thetwodrainagesjoininthewestempartofthe propertyandhaveerodedrelative)ydeepgulliesbelowtheuplandbench.Reliefbetween thegullybottomsandtheadjacentbenchsurfaceisberweenaboutl5andT5feet.Atthe timeofthissrudythePloPerlywasundeveloped.Vegetationonthebenchismostlygrass andsagebrush.Junipertrees,sagebrushandgrassglowontheadjacenthills.Atl abandoned gravel pit has been excavated inlo the terrace escarpment near the westem propertyline.Fillsassociatedu,it}thegravelminingandfillsalongCountyRoadl14 ha,e been praced across the ephemeral drainages tributary 1o the property and a large frll ,,,,",,,,u.,o,,tbeincisedgullywereitexitsthewestempartoftheproperts,.Thefill o Job No. 105 652 c$r=cr, t -3- in the westem part of the properqr associared with gravel mining is about 50 feet high and in places frlis along Counrl'Road 1 74 are about 25 feet high' REGIONAL GEOLOGIC SETTING Theprojectsiteislocatedinanareaofcomplexgeologl,i:lthesouthcentra]partofthe carbondale Evaporite collapse center ro the east of the Grand Hogback rnonocline' see Figure 1. The Grand Hogback is a fust order geologic struciure that marks the transition between the rfrhite River uplift to the northbast and the Piceance basi:l to the southwest' Both were formed during the Laramide orogenl'abou140 to 80 million years ago' The Grand Hogback marls the western limit of the western colorado evaPorite region' 1he carbondale evaporite collapse center is a northwest trending regional geologic structure thatcoversabout460squarenilesandextendsfromBasalttonorthofRifle({irkhana andothers2oo2).Asmuchas4,000feetofregionalsubsitienceisbelievedtohave occurred in the southern part of the collapse center near carbondale during the past 10 millionyearsasaresultofdisso]utionandflowageofevaporitefrombeneaththecenler. Much of the collapse aPpears to have occurred within the past 3 million years which also corresponds to high incision rates along the colorado River and its main tributaries sucb as the Roaring Fork River (Kirk}a',., and others ,2002). If this is the case, the long-term averagesubsidenceratewasbetween0.5andl.6inchesperl00years.Some geologically young fault and evaporite related anticlines are present in the project area but because of the'nature of evaporite tectonics tbe faults are not considered capable of generating large eartbquakes. The closest geologically young faults' faults less than about l5,000years,consideredcapableofgenerationlargeearthqud<esarefau]tsT*. wiliiams Fork Momtains fault zone that is about 60 miles to the nofiheast of the project site and faults in the southern section of the Sau'atch fault zone about 66 miles to the southeast of the project site (Widmann and Others' 1998)' D Job No. I05 652 c$eal -4- PROJECT SITE GEOLOGY The main geologic features at the project site and\'iciniu are shou'n on Figure 2' The uplard bench at the project site appears to be associaled with a former' higher Ievel Roaring Fork River variey floor thar existed at the time of a rniddre preistocene-age Burl Lake glacialion. surficial soil deposits in the area include Roaring Fork River glacial outwash, allul,ium of varying ages on the upiand bench and colluvium on the adjacent hillsides. Near sr:rface formation rock is the Eagle \/alley Evaporite, basalt flows and associated volcanic sediments' SURFICIAL SOIL DEPOSITS Ii RoaringForkRiverglacialoutwashgravels(Qt5)formahighieve]teraceinthewes.terD part of the project arca andhave been mined for aggregate ne.* the westenr properg' Line' ., The terrace surface stands about 255 feAabove the modem 1ivg1 sfuennel and the outn'ash is probably associated with a middle Pleistocene-age Bull Lake glaciation about 132 to 198 thousand years ago. Three ages of tributary drainage alluvium are present belou'the uplaad bench. Qa5a and Qa5b are tbe o]dest, Qa2 is of intermediate age and Qal is the youngesr alluvium. The oldest ributary drainage alluvium directly overlies the Bull Lake outwash along tbe lerrace escarpment, is of a 5imilar age and probably exlends below tbe intermediate age and youngest alluvium on the upland bench to the east of terrace' The Qal and Qa2 alluviums are geologically yor:ng and were deposited in post-glacial time' during about the past 15,000 years. Relatively thin colluvium (Qcl) is present belou'the incised gully sides in the western part of the ploPerry and relatively thin colluvium (Qc2) usually covers the forination rock on the hills to the north' east and south of the prcperry' Relatively extensive man-placed fills (af) associated with gravel mining and @r:nu Road 174 arepresent in the projecl area' At the boring sjtes the tributary drainage alluvial deposits rn'ere from 14 to greater than 5g.5 feet thick, see Figure 3. The soil profiles at the borings typically consisted of an upper fine sandy silt and clay from 14 to 25 feet thick that overlies stratified sand and silt with scattered graver and sand and gravel with scattered c<.rbbres. Interbedded s,tstone, J J JobNo. 105 652 c$tecr, o -)- o sand$one and glpsum was encounrered il Boring 3 at a riepth of l4 feet aad in Boring 4 at a depth of33 feet' FORMAT]ON ROCK TlremiddiePennsl,IvanianageEagle\/alle},Evaporite(Pee)uncierliestbesrrrficialsoilon the upland bench and localll' crops oul on the i<nobs and hillsides that srand above tbe bench. The Eagle Valle)'EvaPorite is a sequence of evaporitic rocks (mainly g)?sum' anhydrite and halire) that are interbedded u'ith light colored mudstone' fine-grained sandstone, thin carbonate beds and black shaie. outcrops along the cor:nty road near the project site indicate that the bedding in this area strikes to the northeast and dips betnrcen 45 and 6? degreesto the soutbeast. see FigUre 2' The local bedding is not consisterrt with the northwest regional structual trend and indicates that the evaporite in the project area has been deformed by evaporite flow' The middle Pleistocene-age glacial ounpash terrace:m the area does Dot appear to have been substantially deformed by evaporite tectonics since formed about 132to 198 thousand )',ears ago' The evaporite is relati'rely soluble and subsurface voids and related sinkholes are locally present through the uestern Colorado evaporite re-sion in areas where the evaporite is near the surface' see Figgre 1' Sinkboleswerenotobservedduringorrrfieldl,isitbutsubsurfacevoidsthatcouldleadto surface sinkholes may be present locally on the Property' Miocene-age basalt flo,r,and associated vslsan'is sediments (Tb) overlie the E4gle valley Evaporite on the va]Iey side to the north of the property and the basalt is the Los Amigos Mesa rim rock. The basart in the area has been radiometric dated to be between about 7.5 and I0 million years old Qfirktanr a:rd Others 2OO2)' The basalt flou's are broken and deformed as a result of regional subsidence since they were erupted. The assopiated interflou,sediments consist of rounded basalt, sandstone and quartzite gravel' cobbles and boulders in a soil matrix' o Job No. 105 652 c$tecn -6- EIELD DPLORATION Thefiejdexplorationfortheprojectwasconductedbetweenoctober6and14,2005. Five exproratory borings were dr,led at the iocations shown on Figr:re 2 to evaluare the subsr:rface condidons. The borings were advanced u,ith 4 inch diarneter continuous flight augerpoweredbytruck-morrntedCME45Bandtrack-morrntedCME.45drillrigs.The boringswereloggedbyarepresentativeofHepworth-Parr']akGeotechnical,Lrc. Samplesofthes'rbsoi]swereta]ienwithalTtinch*:,i:cblDspoonsamplers.The samplersweredrivenintothesubsoilsatvariousdepthswithblowsfrornal40porrnd |ammer falii:lg 30 inches. This test is simi]ar to the standard penetration test descri\red byASTMlr4ethodD.l586.Thepenetrationresistanceva]uesareanindicationofthe relativedensityorconsistencyofthesubsoiisandhardnessofthebedrock.Depthsat u,hich15g5aml'lesweretakenandthepenetrationresistancevaluesareshownontfhe LogsofExpioratoryBorings,Figure3.Thesa:rrpleswerereh]rnedtoourlaboratoryfor review by the project engineer and testing' SUBSURFACE CONDTTIONS Graphiclogsofthesubsr:rfaceconditionseDcounteredatthesitearesbownonFigure3. Thesubsoi]s,belowathintopsoiJtootzone,consistofavariabledepthofintellayered silt,sandandclayaltuviatdepositsoverlyingveryhardsi]tstone/sandstonebedrock.The alluvialsoilswereencounteredtoadepthof4Sfeetinthewesternpartandtoadepthof Sgyzfeetrn the east part of the properry. In Boriags 3 and 4, located in the central part of theproperty,siltstone/sandstoneandgypsumbedrockoft}eEag|eValleyEvaporitewas encounteredbe]owthealluvialsoiisatdepthsof14and32Yzfeet,*',""1":]1*:' bedrockwasconsistentlyveryhardanddidnotapPeartocontainvoids.Drilliagwith depthintheal]uvialsoilsandbedrockwithaugerequipmentwasdifficultduetothe hardnessandpossiblecementedzones,andpracticaldrillingrefusal$'asq?ically encountered in the dePosits' o c o Job No. I 05 652 c$tecl-t , ' lerfomred on sampies obtained from the borings inclucied nalr:ral Laborato4' testlnB I moisture conlenl and densiq,, liquid and plastic iimits and fu:er than sand size gradation anah,ses. Results of swell-consoiidation resting' presenred on Figures 5 through 8' indicate the alluvial soils u'ithin about the upper 10 feer are r1'pically hycirocompressive and moderately to highly compressibie under ioad after wetting' some of the clay soils ,6,ftfu depth q'pically showed a minor to moderate e>lpansion potential when wetted under relatively light loading' The laborato4'test results are summarized in Table 1' FreewalerwasDolencourteledi:ltheboringsandthesubsoilsandbedrockwere relativelY dry. G EOLO GI C SITE ASSES SMEI\T Therearesevera]conditionsofageologicnaturethatcouldaffecttheproposed deve opment and which should be considered in project planning and design' These conditions, their relative risks and possible mitigation to reduce the risks are discussed below. FOUNDAT] ON BEARING CONDITIONS Muchofthetributar5,drainagealluvium(Qal,Qa2,Qa5aandQa5b)isalow'densiq''ei1o soil thal has a collapse potential when wetted and presents a settlement risk to building i*uuo"os, roadways and utilities. !/ays of mitigating this potential risk are discussed in the Prelinzinarlt Design Recommendations - Foundations section ofthis report' CONSTRUCTION RELATED SLOPE INSTABILITY we do not anticipate unusuai risks associated with construction rerated srope instability if theprojectgradingisproperlyengineeredandconstructed.Geotechnicalgradqlg recornmendationsarepresentedinthePreliminary,DesignRecommendations_Site Grading section of this rePort' , Job No. 105 652 c$tectr -8- STORM S/ATER RUNOFF A}ID FLOODING Several drainages are tributa4'to the project site and will contribute water and sedinaenJs to the site rerated to direct runofffronr r:nusually intense rainfa, and hearry snow melt' In mostplacesthedrainageshar,ebeenmodifiedbyfillassociatedwithpastgrave]mining andconstrrrctionofCorrntyRoadl]4.Theinfluenceofthesefil]sshouldbeconsidered inthedrainagestudyandgradingplanfortheproposeddevelopment.Sediments *f"rn'u b,v runofffrom the tibutar5' drainages are f:re-grai:red and not related to sgdimentSqpicalofdebrisflowandfloods.Thetwolargerdrainagebasinstributaryto theproperryhaveroughnesscoefficients(Milton.nrrmbers)lessthan0.4whichis indicative of basins that should not produce debris flows' SI\TKHOLE Sinkholes were not observed on the properfy but geologically young sinltoles are localll' presentiniheevaporiteregionbetweenGlenwoodSpringsandCarbondaleandweare awareofthreesin}bolecollapsesinthisregiondurin'*"-l*twoyears.BasedoDorrr currenl understanding of the er,aporite sin]ilho]e process, all areas in westenr Co]orado, includingtl.p,oi""t-,ite,vr,hereevaporiteisshal]owhavethepotentialforsrn}Io]e development tbat could be a safety risk to buitding occupan-ts if open -qplution voids are Presentinthesubsurface,seeFigrrrel.However,consideringthelargeexlentofthe sinkhole prone area ia comparison to the small number of geologicalty young sinkholes andhistoricsinkholes,inouropinion,itisreasonabletoinferthattheprobabilityofa sinkhole collapse at a specific location on the property is low. The sid<hole risk at the projecl site does not appear to be greater than elsewhere in the Glenwood Sprilgs/Carbondal e evaporite region' Because of the comprex nature of the evaporite related sinkhores, it wilr not be possibre to avoid all sinkhole risk at the project site but the risk can be reduced by site specific st'dies. The potential for shalrow subsr:rface voids at buiJding sites and other important facifities can be eva]uated by subsurface exploration. if conditions ildicati,e of silkhole Job No.105 652 c$tech o -9- i related problems are encouilered. al alternative iocation should be considered or the feasibiiity of mirigation evaruared. MitigarioD measures c'ould incrude (r ) srab,izarion by grouting,(2)srabilizationbl,excavationancjbackfilling,(3)adeepfoundationq'stem,(4) slructura]bridging.or(5)arr.lalfoundation$,stem.Homeownersshouldbeadr,isedof the sinkhole risk, since earll'detection of building distress and timel1'rernedial actions are imponant in reducing the cost of remediation and for life safeq' conc€rns should an undetected sinl<bole smrt to de'r'eloP after construction' REGI ONAL EVAPORIIE DEFORMATI ON TheprojectsiteisintheCarbonda]eevaporitecollapsecenterwhereregionalgrouad deforrrations have been associared with e'aPorite solution and flou'in the geologic past' Evaporite deformation i:r rhe project area started about 10 miliion years ago and much of the deformation may have occr::red within the past 3 million years' but it is uncertain if the deformation is st,r active or if defomration has stopped. If evaporite deformation is stillactive,itappearstobetakjngplaceatveryslowratesandoverbroadareaswithiittle riskofabruptdifferentialgrounddisplacementexceplalongevaporiterelatedfau]ts whicharenotpresentattheprojectsite.WeareDota\ryareofer'aporiterclat€d deformation problems in the region. In our opinion" tbe culrently available informalion onregionalevaporitedeforrrationindicatesa]ou,risktot}eproposedprojectfacilities. EARTH QUAKE CON SIDERATI ON S TheprojectareacouldexperienceearthquakerelatedTo*oshaling.Historic earthquake ground shaling in the region has been moderately strong but has not exceeded ModifiedMercallilntensityVlff'irkhamandRogers,lgS5).ModifiedMercdlilntensity Vlgroundshakingshouldbeexpecteddrrringareasonab]eexposrrr€timefort}e proposeddevelopment,buttheprobabilityofstrongergroundshakingislow.Intensity VI ground shaking is felt b)'most people and causes general alarrr' bur results il negligibleda:rragetostructwesofgooddesignandconstruction.Thebuildingsshouldbe designed to withstand moderatel)' strong ground shaking u'ith-little or no damage and notl, lob No. l0i 652 c$tecr" iri -10- tocollapseunderstrongelgroundshaLing.TheU.S.GeoiogicalsurveyNationa] seismic HanrdJ\4ap indicates that a peah ground acceleration of 0'069 has a 10% exceedence probabiliq'for a 50 year exPosure time at the project site (Frankel and Others' z'oz).This correqponris to a statisticar recrurence rime of 475 years' The region is in the lggTUnifonriBui]dingCode,seismicRiskZonel.Basedonoulcurrentunderstanding oftheearthquakepotentialinthispartofColoradoweseenoreasontoincreasethe previously accepted seismic risk zone for the region' ENGINEERING ANAIYSIS Developmentoftheprojectasproposedshou]dbefeasib]ebasedongeotechnical conditions. The upper alluvial soils encountered in the bori:rgs tend to collapse (settle underconstaDtload)whenwetted.Thedepthofcoliapsiblesoi]sisexpected10be variable across the project site. The arnount of settlement w,l depend on the depth ofthe compressiblesoilsandthewetteddepthbe]owtheforrndation.Tbedeepersoilsthatshou, some expansion potentiar wben wetted are expected to not be ''pically encountered in excavations and not siguificantly impact the foundation design- The settrement potentiar and risk of excessive building distress can be reduced by compacti:'""i::lt'o " certai:rdepthbe]owtheforrndationbearing]eve]andbrh;avrlvreinforcingthe foundationtoresistdifferentialsettlements.Thecompactioncouldalsoerlendtobelow drivewayandutilityareas.StructtrralfillsectionsareexPectedtoberelativelyminorbut relativelydeepstrucnrralfrllswillhavesomepotentialforlongtermsett]ement.Proper gading and comfraction as presented below in Site Gradingwill help reduce the settJementrisks.Aheavilyreinforcedmatfoundationdesignedforlargedifferential settlements could also be used to reduce the settlement risk' Recommendations for preliminarl' design of the proposed development are presented be]ow.Whenthebuildingplanshavebeendeveloped,weshou]dre.t,iewtheinformation for compliance u'ith our recomrDendations' o o , JobNo. l 05 652 c$ecr' - 11- o PRELIM] r._ ARY D E S I G N RE C OMMEND A TI O N S FOLINDATIONS considering the subsurface conditions encouilered in the exploratoD'borillgs' the variabie rerrain anri the residential proposed consrnrction: we recorunend the buildings be founded u,ith spread footings bearing on al jeast 3 feet of compacted on-site soils' The feasibititl,offootingsplacedonthenatura]soilsshou]dbeer,a]uatedbyadditional subsurfaceexplorationpriortoconstruction.lfmatfoundationsareconsideredfor buildingsuPport,weshouldbecortactedforadditiona]recommendations. Tbedesigpandconstructioncriteriapresentedbe]ou,shouJdbeobservedforaspread footing foundation system' 1)Footingsplacedonatleast3feetofcompactedfil]oronnaturalsoils dependingontheresu]tsofadditionalexploration,shouldbedesignedfor aaallowablebearingpressl.rreofl,500psf.Basedonexperience,we expectinitialsettlementoffootingsdesignedandconstuctedasdiscussed inthissectionu,il]beaboutlinchor]ess.Additiona]differential sett]ementbetweenaboutlto2inchescouldoccurifthesoilsarewetted. 2)Thefootingsshouldhaveaminimumwidthof2}inchesforcontinuous walls and 2 feet for isolated Pads' 3)Erleriorfootingsandfootingsbeneathurrbeatedareasshouldbppro.r,ided withadequatesoi]coverabovetheirbearingelevationforfrostprotection. Placementoffoundationsatleast36inchesbelou,exleriorgradeis rypicallY used in this area' Thefoundationshou]dbeconstnrctedina..box-like,'configurationrather thanwithiso]atedfootings.Tbefoundationwallsshouldbeheavily reinforcedropandbottomtospanloca]anomaliessuchasbyassumingan unsupportedlengthofat]eastT4feel.Foundationu,allsactinggslglaining structuresshou]dalsobedesignedtoresist]atera]earthpressur€sas discussed i:l the "Foundation and Retaining s/alls" section of this report' o 4) o lob No. 105 652 c$tecrr - 1./- All foundation and retaining structures shourd be designed for appropriate hydrostatic and srrrchargeplesswessuchasadjacentfootings,trafEc,consbuctionmaterialsand equipmenr. rhe pressures r:::*:u"u uo:":.Tt"-:::ed conditions behind the walls and a horizonUl bacldll !,rface' The buildup of water behind a wall or an upward sloping backfi,, surface u,,l increase the lalerar pressure imposed on a foundation waII or retaining structure. An underdrai:: shouid be pror,ided to prevenl hydrostaticpressure builduP behind walls' Backfill should be placed in uniform lifts and compacted to at least 90% of the manimum standardProctordensityatamoisnuecontentnearoptimum.Backfillinpavementand wallrrruayareasshouldbecompactedtoatleastglohoftbemariimumstandardProctor Thetopsoilandany]ooseor<iistrrrbedsoi]sshou]rjberemoved.Thesoils should be subexcavated as nee<ied to provide at least 3 feet of structural fil] O be]owthefootingbearinglevelcompactedtoatieastgS%ofthema}dmuE standard Proctor densig'within 2 pacenrage points of optimurn sroisture content.'frlherefootingsareplacedonthenaturalsoils'theexposedsoils in footing area should be moistened and compacted' A representative of the geotechnical engineer should evaluate the compactionofthefillmaleria]sandobserrea]]footi:rgexcavationsprior ro concrete placement for bearing conditions' o s) the on-site soils' Job No. I 05 652 6) FOI.INDATION A}TD RETAININ G U7AtrLS Foundation wails and letaining strucfllres which are laterally supported and can be expected to undergo oniy a slight amouDt of deflection should be designed for a ra.ferar earth pressure computed on the basis of an equivalent fluid r:nit weight of at least 55 pcf for backf, consisting of the on-site so,s. cantiievered retaining strucrwes which are separate fiom the buildings and can be expected to deflect sufficiently to rcobilize the fult + active earth pressure condition shou]d be designed for a lateral "* ,*1,-:e computed l on the basis of an equivaient fluid unit weight of at reast 45 pcf for bacrd, consisting of c$tea" fI +. density.Careshou]dbetakennottoovelcompactthebackfrl]oruselargeequipment near the wall, since this could c.ause excessive ]ateral pressure on the wall' Some sett]ement of deep foundation wal] bacldlj should be expected, eveD if the u:aterial is placed ssrrectl),, and could result in disuess ro faciiities conscructed on the baclfitl' The laterar resistance of foundation or reuining wa, footings will be a combination of the sliding resistance of the footing on the foundation materials and passive earth pressure against the side of the footing. Resistance to sliding al the bottoms of the footings can be ca]culatedbasedonacoefficientoffrictiondf0.35.Passir,epressureofconpacted bacicfilr agains the sides of the footings can be calcurated using an equivarepl fluid rrnil weigbtof300pcf.ThecoefEcientoffrictionandpassivePressrrrer,a]uesrecommended above assume ultimate soil strength' Suitable factors of safetl'should be included in the desigp 1s rimit the strain which wil occru at the ultimate stengtb, particularly in the case of passive resistance. Fill placed against the sides of the footings to resist iateral loads sbou]dbecompactedtoatleasglioofthema:rimunstandardProctordensityata moisnre content near oPtimum FLOOR SLABS The natr:ral on-site soils, exclusive of topsoil, and compacted structural fill can be used to supportiiehtly]oadedslab.on-gradeconstruction.TbeuPPgnaturalsoilsare compressibleu,henwettedandtherecou]dbesomepost.constnrctionsett]ement.To reduce the effects of some differential DoveEent' Donstructral floor slabs should be separatedfromal]bearingwallsandco]umnswithexpansionjoi:rtswhichal]ow unresfained vertical movemeDt. Floor slab control joints should be used to reduce damageduetoshrinkagecracking.Therequirementsforjointspacingandslab reinforcemenl should be establisbed b1' the designer based on experience and the intended slabuse.Aminimum4inchlayeroffree.draininggrar,elshouldbeplacedbeneath basement level slabs to facilitate .irai::age. This material should consist of minus 2 inch agSregatera,ithatleaslSlo/oretainedontheNo'4sieveand]essthan2YopassingtheNo. 200 sieve , .r.i, Job No. 105 652 c$teal -14- AllflllmateriaisforsupportoffJoorslabsabovefootingbearingleve]shouldbe compactedtoatleasrg5oloofme,xrmr:mstandardProctor.densityatamoisturecontent near optimurn. Required fil, can consist of the on-site soils de,oid of vegetation. topsoil o o and oversized rock' TNDERDRAIN SYSTEM STTE GRADING Althoughfieewaterwasnotencounrcredduringourexploration,ithasbeeooru experience i:r the area that local perch"d g'o*1:':::.:*'* during tiraes ofhearry precipiutionolseasoDa]runoff.FrozengrounddrrriagSpringrunoffcancreateaperched condition' We recommend belou'- gradeconstruction' sucb as retaining walls and i! basementaresS,beprotectedfromwettinga:rdhydrostaticpressr:rebuildupbyan r:nderdraia system. An underdrain should not be provided around shal]ou, crau'lspace areasandfloorslabsconstructednearfinishgroundsurface..i.' If installed, the drains should consist of drainpipe placed in the bottom of the wall bacldll sr:rro,nded above the invert rever with free-draining granular material' The drain should beplacedaleachlevelofexcavationandatjeastlfootbelowlowestadjacenlfinish gradeand sioped 41s minim,m ryotoa suiubre gra,ity outret. Free-draining granurar material used in the r,rderdrain system should contai:r less than 2% passing the No' 200 sieve,lessthan50%passingtheNo.4sieveandhaveamariimrrmsizsof2inches.The drain gravel bacldlr should be at least lt/zfeeldeep. Aa impelvious membrane, such as a 20milPVCliner,shou]dbeplacedbeneaththedrailgravelinatrouphshapeand aflached to the foundation wall with mastic to prevent wetting of the bearing soils' A moderale amounr of grading courd be needed as part of the proposed de'r'eropment pran duetotbevariab]eterrain.]::addition,removalandreplacementofthea]luvia]soils compacted is recommended to reduce the risk of excessive differentiar settrements and buildirrg distress, The structurar fiIl shourd exlend ro at l€ast 6 feet belou' tesign surface gradesurroundingthebuildi:lgsandcou]dbeextendedtobe]or'rytheaccessroads.The Job No-105 652 cE&ecrr o -15- lvyater and sewer pipe joints i:l the roadwal's should be mechanicalll' restraiaed to reduce the risk ofjoint separation in the event of excessive settlement' Excavation and compaction below footing bearing ievel ma1'not be needed depending on the results of additional site.specific exploration and ana1l,sis. The StrucruIal fil] materia]s be]ow footing bearing ]evel should be comracted to at least 98% of the ma:*imum standard proctor densiry u,ithin 2 percentage points of optimr:m moisnfe content' Prior to frl] placement,lhe subgrade shou]d be carefull1, prepared b), remor,ing the vegetation and topsoil and compacting ro al ]east 95o/o of lhema:rimum standard Proctor density at near optimum moimfe conlent. The fiIl shouid be benched into slopes that exceed 20yo grade Based oD our experience, shrinkage of the uPper al]ur,ia] soils due 1o con:paction is expected to be about 20%' permanent,nretained cut and frll slopes shouid be graded at2boizontal to 1 vertical or flatter and prorected against erosion b)'revegetation or other means' This office should review site grading plans for the project prior to construction' SIIRFACE DRAINAGE precautions to prevent wetting of tbe bearing soils such as ProPer bacldu construction" positive backfill slopes, restricting landscape irrigation and use of roof gutters need to be taken to help limit setllement and bui]ding disress' The following drainage precautions should be observed during construction and maintained at alJ times after each residence has been completed: tunderslab areas should be1) Inundation ofthe foundation excavations ani avoi ded during construction' 2)Exteriorbackfil]shou]dbeadjustedtonearoPtimummoisnrreand compactedtoal]east95%ofthemaximumstandardProctordensityin pavementands]abareasandtoat]eastg}Yooftbemaximums-tandard Proctor density in landscape areas' ))Thegroundswfacesurroundingtheexteriorofthebuildingshouldbe slopedrodrainawayfromthefoundationinalldirections.Theslope shouldbeat]east12inchesinthefustl0feetinunpar,edareasandat]easta JobNo.l05 652 c$tea-r -16- 4) 3ilchesinthefirstl0feetinpaveriareas.Draingravelofretainingwalls should be capped with at leas;Zfeet of the on-site soils to reduce surface J water infiltation' Roof gutters should be provided with dounspouts that discharge beyond 16s limits of the foundation wall backfill' Landscaping which requires regular hearry i:rigation" such as so4 should belocaledal]east5feetfromforrndationwalls.Considerationshouldbe giventouseofxeriscapetoreducetbepotentialforwettingofsoilsbelovr, the building caused b,v irrigation' PAVEMENT SECTION The upper soils encountered at the site consist of lou'plasticiry sand' silt and clay that are consideredapoorsupportofpavementsections.AHveemstabilometer.R'value.9f15 vTas assumed for the native soils' The 6affic loadings for the development have not been provided but are assumed to be reiatively iiglt for the service trafEc loading condition" af,er the construction phase. Based on these conditions, a preriminary pavement section O consistingof3inchesofasphaltolginchesofCDOTC]ass6basecor:rseis recom:nended. we sbould review the pavemenl section design when the roadway subgradehasbeenrougbgradedandthetrafEcloadingshavebeendetermined. LIMITATIONS ThisstudyhasbeenconductedinaccordancewithgenerallyaccePtedgeotechnical engineering principles and practices in this area atthis time' we make no warraoty either expressorimplied.Theconclusionsandreco[lmeDdationssubmittedinthisreportare based upon the daU obtained from the exploratory borings drilled at the Iocatlpns indicated on Figure Z,theproposed gpe of construction and o*r experience in the area' our services do nol inclutle determining tle presence' prevention or possibility of mold or other biological contarninants O4oBc) developing in the future' If the client is concemed about luoBc, then a professional in this special field of practice should be consulted. our frndings include interpolation and extrapolation of the subsurface c$tech s) Job No. I 05 652 O -1'l - conditions identified at the explorarorl'borings and variations in the subsurface conditionslDallnolbecomeevidentunti]excavationisperformed.Ifconditions encounrered during construction appear different fiom those described in this repor! we should be notified so that re-evaluation of the recommendations may ft made' Thisreporthasbeenpreparedfortheexclusiveusebl'owclientforplanningand prelimina4, desiBn purposes. we are not responsible for technical interpretations b-v otbers of our information. As the project evolves, we should provide continued consultation aad field sen,ices dr:ring construction to revieu'and monitor the implementation of o1r reco[lmendalions, and to veris'that the recolnmendations have been appropriatell, interpreted. Signifi cant desi gn changes ma1, require additional analvsis or modifications to the recommendations presented herein' We recommend on- site observation of exca,ations and foundation bearing strata and testing of str'ct,ralfill on a regular basis b1' a rePresentative ofthe geotechnical engineer' Reqpectfu tlY Submitted, HEPWORTTI - PAUTI-AK GEOTECHMCAL' INC' Steven L. Pawlalq P-E. Reviewed bY: DanielE. Hardin, P.E' SLP/ksw T Iob No. I05 652 c$ecr, - 18 - REFERENCES Frankel, A. D. and others ,2002' Docuntentationfor the 2002 l'ipdate of the National seismic Hazard Maps; u. S. G.J.gi; s*ty open File R'eport 02420' Kirkham,R.M.andRogers,y.l.,lgs.5,ColoradoElrthqualrcData.andInterpretations I867 toJgs;' 6i;do Geological Survey Bulletin 46' Kirkham. R. M' and Others '7996' G1olog Mry o{t\ C'o!l'Creek Quadrangle' Garfietd c":r;;,-;;irrio, coroilao ceoiogical Survel' open File 96-1' Kirklram R. M. and others ,2002, Evaporite Tectonism in the Lower Roaring Fork River valley, w,nl{"il,c'i"a;riri'*r"- R' M'' scott' R' B' and Judkins' T"w' gb., Lare c'iioii z"aporite T;;;fit* "d Vol'onism tn West-Central colorado:Geological Society oi-ii";,"uSpecial Paper 366' Boulder' colorado' Kirkham,R.M.andScott,R.B.,2oy,]ntroductiontoLateCenozoicEvaporite' rccronism r;; t;;i;rrism inw";r;:;;;;;J, Cotorrdo, in Kirkha:n R M', Scott" R' B. and Judliins, T. W. eds- Larc Cei,iroii Evaporite Tectonism and Volcanism in w e s r -c entr al t ol or a do: Geologif J'i "ri"ty oi a-oi ", Speci aI P aper 3 66' J t Tweto, O. and Others, 7978' Geologt \ap of t'he'Lteadville I oX 2 o Quadrangle' N orthw e st er;' ; ;;;;;,- u3. ceotogi ca survey Map I-999 - WidmannB.L.andOthers'7998'PrelintintyOuaternaryFaultandFoldMapartdData Base of CoUloai-,-boioraao C""i"gi"a;S*"y Open File Report 98-8' Boulder, Colorado JobNo.l05 652 c&5ecrl , ,,! BORIN 2 -.: i: ,,.. BORING 9 NG 13 tltBORING 3 tlltl BO I 1 riil NGl ii I BORIN 15 I t i--='-.i il' i! i! ;i i_-ui l--r-,i ;t ii [.i.-l ii ii ) APPROXIMATE SCALE 1" = 300' FIGURE 1LOCATION OF EXPLOBATORY BORINGSH HEPWORTH.PAWLsK GEOTEC HNICAL 1 05 652 BORING 1 BORING 11 iE BORING 1O il ii i! rl k l: TT liBORING 5 ililltult lll ll t1tltl l\ r.tll Jo(rr o)N(rt E, * E aE 3oI E & E:t Bums Brldget% Wolcoll r\ Avon Eaole CoTlapse Genter (980 sq. ml.) Vall a Explanatlon: fi ero;ea Slte Shallow Evaporfte ln Eagle Valley Formatlon and Eagle Valley Evaporlte. Rtd \Mtire River Uplifl Uplifl Dotsero Piceance Rifle New Glenwood River a Poled DSlte Eoa o I =og o o,oo m o)!o olv €05 sirt Basin Ca Gollapse Center (100 sq. ml.) l0 Mlles .Tt 6'tr d Rcterenccc: JffinT#J:?ffiB U) G, €o, o= 1 0,J(oo :, r,: =(I, Basall Aspen - _ ---- nilr 63l5 ^.-rr,U'S 65t5 cr2s Lron 63r3 ttn 4?+Glc2/Fee BI O ) ( QaSa Lh. QeSs h I :, I t.l I III,t, m'r. (n" EI =lctlai n.0t; o = 5r{tol @o o J Erplmellon: gp al Qol Oc2 Grawl Plt Floor MrnPlaced Flll GolltMum: Collwlum on lndsed gullY Cdca. Colluvlun: Shallovr, collwlum ovrr fomallon mdt. Youngcst Trlbutery Alluvlum: lntermedlalc Age Tilbdary AlluvlumOr Tilbutrry Alluvlrrm: Ots Bull Ltke Outwrch Tb Brsalt Flowr eld Scdlmcnts Fcc EeglcVrllcYEvePoilte Conttct: Approxlrnatc boundary ol mep tnrlte. -9...... Rcolonrl Frdts:o lpirxlmtc locatlon, dotlcd whctc oonoltled, U - uPthrwn ddc, D 'downthmun dde' 0 !tr Shltc end Dlp: Strlke rnd dlp ol beddlng ln dcgees. Elplolltory Borlngs: Appoxlmatc locetlon. 400 tt. rll Scale: | fi. = {[ F Contour llta-q3[ I o GIg A Oat o2 QaSa- 'lcnra lcvcl, b hlghcr tcnacc lalcl - BI ''.Btt BORTNG 1 BORING 2 BOBING 3 tsORING 4 tsORING 5 0 10 15 20 30 0 tr E 18112 WC=5.1 DD=95 32112 2516 WC=5.6 DD=110 50/6 WG=7'3 DD=112 -200=91 5014 BOTTOM OF BOBING AT 48 FEET 40t12 40112 WC=7.8 DD=115 50/6 50/6 5ore WC=7.7 DD=t1B -200=66 23112 WC=6.0 DD=107 27112 WC=6.0 DD=123 -2OO=70 LL=24 Pl:6 5016 s0/3 50/1 s0/3 Note 12/12 WC=7.0 DD=100 30n2 WC=8.9 DD=102 -2OO=94 LL=3!t Pl=15 25112 38112 45112 WC=8.6 DD=121 7112 16i12 WC-5.8 DD=,'13 10 19n2 15 23112 WC=l 52/12 DD-_ -200= 60112 38112 35 40 BOTTOM OF BORING AT 59.5 FEET 2A 30 o)o)l-L I !aor oo)lr I 25 25 50/1 atr 5012 ci symbois is shown on LOGS OF EXPLOFTATOBY ESFINqS- _105 652 40 5014 4. Figure 3 a TOPSOIL; sandy silt' root zone' brown srLT (ML); srighry sandy to sandy, crayey zones, stifi to very stifr, s,ghry moist, light brown' slightly calcareous' GLA' (cL); srigrrry sandy to sandy, sirty, stiff to very stiff , srigh,y moist, lighl brown to brown' low plasticity' slightly LEGEND: w calcareous. srLT AND SAND (ML-SM); scatrered graver to graveily, very stift to hard, srigrrtly moist' light brown' subangular basalt rock, slightlY calcareous' W :ffi,t3fffifiJ:iil GM); s,tY' sandY'scattered cobbles, sandy silt layers' medium dense' slightly moist' ffi SILTSTONUSANDSTONE BEDBOCK; some gypsum', very harci' dry' grey' Eagle Valley Evaporite' IHffi h Retatively undisturbed drive sample; 2-inch l.D. calilornia liner sample' l' t Drive sampre; standard penetration test (sPT), 1 3/8 inch l'D' split spoon sample', ASTM D1586' r Drive sampre ipHstJrlJli,lfalrsJ+,JJjJ[?H?leH: pound hammer rarrins 30 inches were o': ;:ffi],ffffffi;Ti',l,,ilr0"," oro"m or roe indicates murtipre attempts were made to advance I tnt boring' ,. lr,rr"til, or exproratory borings were not measured and the logs or exproratory borings are drawn to depth' 4. The exproratory boring rocations shourd be considered accurate onry to the degree implied by the method used' 5. The rines between materiars shown. on the exproratory boring rogs represent the approximate boundaries between , ffi1'J]jtr**l'ffJ.I;]'J.l:il',:"H ",the time or dri,ins. Fructuation in water rever mav occur with time' NOTES: 1. Exproratory borings were drired between october 6 and 14, 2OO5 w*h 4-inch diameter continuous'igrd power auger 2. Locations of exproratory borings were measured approximatery by pacing rrom reatures shown on the site plan 7. Laboratory Testing Besults:" Wa = Water Content (7d -o8o=ifl, BBli'y, 9r", ^0t N o' 200 si eve LL = Liquid Umit (%) Fi= PtasticitY lndex (%) Figure 4 LEGEND AND NOTES 1 0s 652 Moisture Conlenl = 5.1 Dry DensitY = 95 Sample of: SandY Silt From: Boring 1 at 4 Feet percent pcl )-.f Compression upon wetting \ \ \) 0 1 2 4 tsS trot)ooo Eo(J 1.0 10 100 0.1 APPLIED PRESSURE - ksf Moisture Content = 5.6 Dry DensitY = 110 Sample ol: SandY Silt and ClaY From: Boring 1 at 14 Feet perceni pcf I Expansion upon wetting \) ES C .9otr6ox UJ Icoao(I)o Eoo 0 1 2 10 APPLIED PRESSURE - ksf Figure 5SWELL-CON SO Ll DATION TEST REqULTS-H GEOTECHN]CAL105 652 0.1 1.0 100 ( Moisture Content = 7'8 Dry DensitY = 115 SamPle of: SandY SiltY GlaY From: Boring 2 at 10 Feet percenl pcf ExPansion upon wetting Moislure Content = 6'0 Dry DensitY: 1O7 SamPte of: SandY Silt and ClaY From: Boring 3 at 5 Feet percent pcf upon wetting oN TESr-EESULT9-DATISWELL-C NSOLIo 105 652 2 ESc -9oC IEox UJ I Co -oo @Lo EoO 1 0 1 2 10 100 100 0.1 1.0 APPLIED PBESSUBE - ksl IcofrC .Eoxul Icoao'o o Eoo 1 1 0 2 3 0.1 1.0 APPLIED PRESSUBE - KSf 10 Figure 6 Moisture Conlent = 7.0 Dry DensitY = 100 Sample of: SandY Silt and GlaY From: Boring 4 at 5 Feet percenl pcI (L t expansidn t upon wetting \ \ I ) 1 0 1 2 i, beco'6coox trJ I Coaooo EoO 10 ---*PP{=|EDf'AESSUBE -}sf' -. ' 1001.00.1 4 2 1 0 I Cofrc(6ox I.JJ Icoaooo Eoo 10 APPLIED PBESSURE'ksl Moisture Content = 8.6 Dry DensitY = 121 Sample of: SandY SiltY ClaY percent pcf Boring 4 at 30 FeetFrom: \ \\ \ \ )Expansion upon wetting_ SWELL.CON SOLIDATI ON -TESIBESIIITS Figure 7 H 1 05 652 0.1 1.0 100 I \ 1 Moisture Conlent = 5'8 Dry DensitY = 113 SamPle of: SandY SiltY CtaY From: Boring 5 at 10 Feet percent pcf upon wetting Ic -9oc(Eoxlrl I cooo 0)o Eoo 0 2 10 APPLIED PRESSURE. KSf0.1 1.0 100 Figure I SWE LL- C O N S O LI DATI O NJE_ST_BESULTS - - HNTCAL105 652 1 SECTION a:70 (B) SU PPLEMENTAL INFORMATION SCS SOILS MAPPING r06 55 SITE e scHMuESEr L SeBpoil_ll!- E SECTION 4: SCS SOilS 7o(B) ilTAP f7,:U-UlClNllY)Onta by JKJd lld otnzr lu*05-08-06 6nooN ME/ER, tNc I l 8 W. 6TH STREET, SunE 2Oo GLENWOOD SPRINGS, COLORADO 8 I 60 I(970) 945- I OO4 FAX (970) 945-5948 ASPEN, CoLoRADo (97O, 925-6727 CREsrEo Bu.l-rE, CO (97O) 349-5355 SCHMUESER --ETilNffis-l nRvEYoRS ,1 ,t i-:'t +g *r5yrry1," a ^+i :L :, r d* +t \ n ro \ 6-Ah4v loom- I to 12 perccnt ?lopeq, fhis- deep, tcll druined sorl is .on fons ond dominontly ftom colcorcous tcdbd sondstonc ;;";iA;: Et;;t ; t" -O,Om to Z80O fcet. lhlc ovcrogo onnuot precipitotion is t2 io- tl lncne", the ovcmge onnuol oir tempercture is 12 to 16 dcgrccs E ond t6c overuge ftost-free Perid is 8!i-lo5 dap- fiqicolty, thc suiace lolor is rcddish brcvn loom obout E inchcs thick. lhc uppcr s'i;;i; i sonay cby'loom. fhe louer 15 inche- is sondy clq loorn' fhc iri"liiui {iiacpU of 6O inchcs or mone is frnc sondy loom..lh.c soil ie ,Zrit*r*r" to o' dcpth of I I inchcs ond calcarcous blov thot dcpth' lncluded in this unit orc smoll oteos of &npedmdo sorls. lncludcd oteos moke up obout 2O perccnt of thc totol ocft,oga Pcrmeobility is moderute in the Almy soit Awitoblc votcr coPocio/ it .high. .fhe'"riitil-'i"ing aiiti i" tu inchei or mote. Runoff is mcdium, ond thc hozord of voter etosion is modemta fhis unit is used os rongelond or hoylond. fhc potentful plont communi$r .is -.moinl OiicOuncn uhcotgross, lidion riccaruls, boftlcbritsh squineltoil .DougPl mbfitbrush, iii-ttW.,rC iii *d.Orurn. Prcihe iunegmss, nadlcotdthrcod, ond Sondbctg.- 6i;";fr;-;i;-z; i;auaa. me ov6msi onnuot.-ptoductio.n of oir_-.dry vegctotion is iUit-iSO pounds Nr ocne. tf thc roigc cqndition dctcriorote, lQoming- big igcOruen, -Douglos' tobbi:tbrush, cheotgms, ond onnuol tccds increos in obundonce. fhc suitobl of this unit for runge secding is good. l.oq of the .surfocc lolor ;,ren - fuuccs thc obitity of the unit to prcducc plonb suitoblc for gmzing. fhis unit is uell suited to hoy and posture. lt hos fcu limitotions. Orosses ond bgr;;; jrci vctt if odcguoie fertiiizcr is uscd. lf ptopctty monogcd, thc unit con ploduce 5 tons of furigot6d gross hay Nr ocne onnuolli- Ihis unit is rctl suitcd to homeitc dcwloprncnt fhis mop unit is in copobility subcloss Me irrtgtotcd ond noninigotcd. ft is in thc Rolling Loom rungo sita. S,-Gvosum land-@psiorthids com4bx- 12 to &5 P?,rccnt slory,_ fhis nop unit is o" mourtoi"s|d.", on hitls, ond olong dissected droinogcuolo (Fig. 5). ft is on hills ond conlan sidc sloPcs thtoughout thc suruey oteo. fhis unit is obout 65 pcrcent G)rpsum lond ond 2o pcrccnt Gypsiorthids. lncluded in this unit ore smoll oreas of Toniorthente ond Combotthids. lncludcd areos mokc up obout 15 prcent of thc totol crcncogtc- Ihc Glpsum lond coneists moinly of exposed porent moteriol thot hos o very high content of glpsum- lhc Gy,psiorthids orc shollou ond modcratcly-dccp and.ucll .aryi?A:..7hcy formcd. in ,*fih and colluium deri6d dominontly ftom' mixcd motcrful vith o very high-'iniini of Wp"u.. Stop is 12 to 5! phrccn; No singlc ptofilc of thcsc soils is twical. but-one commonb observed in'the surwy orco hos o surfocc lopr of wty-fiii- 6iin ine sondy tiom obout I inches thiCk 1hc substtotum is finc eondy loom. Soft gltpsifetois sholc is ot o dcpth of obout 39 hchcs' Permeobility is modcrote in thc Glpsiorthids. Awiloble votcr copocity is loy or moderutc. \he affective ryottlg $2th is lO to 40 iiiies. Runoff rb 'yery'ropi4 ond the hozord of toter ctosion is slight to sevete on thc stceper slopcs. fhis unit is used os vildlife hobttot fhe notive vcgetotion on thc Glpsbrthids is';i; ;;;;,- ri*, ona Utuh junipcr. fhe 61'pium tond suppotts wtv littlc notiw wgctotion. This unit is poofu suitcd to homesitc dcvclopmant. |hc moin limitotions ore the "apr, in" iorort of crosion, piping, ond lob soit stnngth during vet pcrfo&' This mop unit is in copobitity clo* W. No runge sitc b assigncd' e SCHMUESER I GoRooN I MEYER I IA W. 6TH STREfr, SUTTE 2OO GLENW@D SPR|NG5, CoLoRADo B I 60 I(970) 945-l OO4 FAX (970) 945-594e ASPEN, CoLoRADo (970) 9"5-67"7 CRESTED BurrE, CO (97O) 349-5355 SCHMUESER GORDON ME'/ER, 05-08-06 ry,b tip. 01502F JK Fb: SOruS SECTION 4: @ons lo6-Tn'dcll-Bmvnsto storv sndv lams- l2.to 50 Ftant sloryr=erttvgL Sorlt'a,wtbn ir d@ to ZvD fact iii-ir{-ic onnuol pecip16ion is 12 t9 11 incha, tl,' owrogo onnuol-oir ii.piitii is ii t5 4 arsrce E od thc overuso M-fra Ftta b as to lO5 dolts. fhis unit is obout 15 pctccttt rridcll soil ond J5 Pctcont Brounsto soil. Aboat 5 to 10 perccnt of thc surfoce is cowrd vith stoncs. lncluded in this unit ore smoll onBo!, of Fotcllc ottd Ewnston sils in thc l8 ;l"ilrg- "l*r"d ircos, lso indudcd onc smcrll onects of bosolt Rock outq ond ihs'na orc similor to thc Tridcll soil but how l8 grzvcl ond fcrcr stono. lncludcd oreos mokc up obout 20 pcrccnt of tha totol ocncogo. hc fridctt sot'l is dccp ond sontcyhot exccssivety doind. ft fotmcd in ollwium ond i1unim dcnlpd doiiiny fiom sondstonc oia Ust. OO1NU thc upcr port of ni-iii.* t n, is groybi bmrn stony xndy loom oboit 2 inchs thick fhc t6vcr-pi is'gro*n'rtr, vsy coodi fine -sondy-lom obut 7 inch* thid<' fhc'iwZii ncn.3 5f thc eubtroium is lery abbf-ltttc sondt bom- ry ??rt Nd i3 ffbby-indy loom obut ll inches thk*. tulot this b 12 incha of ryry stqny nhi'""nay-toon. fhc lorar porl of thc substztum to 9 !9etl! ol Q! !*te b_ >cty stonv loittzv sond. Hord U6on is commonly bclot o dcpth obout 6O inchs. f6c An'P it6"rwus thtottghou1 A thin lolnr-of Portioly dcompd nccdl6, @' ond laotrc is on thc wrfocc in mony Ptoc€s- Pcrmcobility is modcrotcty topid in thc Tn'dcll sotl Awiloble totcr copocity ic initfw rooting dcith i; 6o ittchcs or mono- Runoff is raPid' ond tlo of uotar ctosbn is mo&rotc. Thc Erovnsto soit is dccp ond rell dmincd. ft formad in olluvium derind domimndy fim coow tcxtured, cblarcous sondstonc and bcolt, Tmicolh thc upcr-.port of ii" "irfoi On, e,'fignt Omrnisn gray stony sondy loom o@ut- f. incff t'ick fhc loucr potl is slighy -fuornish groy-stony sindy lcbm obottt 7 indta thi*- fhc'iio.r1e- n"n; oi tt- su*trituin is icty gtirwlly sondy loom. lhc ngxt 12 incha i|'iry gror€tly loomy sond. fho lorer pdrtlo o.dqth of 6O. incha.is gavd| *ii tdo-. A tnin ialor of portiolly dicompo*d nadlg, tvi?g, ond lcovga' is on tho surfoce in mony Ploa. Pcrmcobility is modctotcly mPid in thc Brcunsto sot'|. Avoibbb totcr copoctly is lot ne iftiif"e rooting ac;n is d0 incha or mone. Rutpff b mpr4 ond the homd of uotcr ctosion is modcrota fhis unit b usad moinly for liratock grozing limitcd homesite dcwloprnent, for Christnos posts. b lot hozord or titdlifc tobid ft olo is u*d for traq, or os o &uhaa of finvood ond fhc ootcntiot olont conmunity on thc Tridcll soil is moinly pinnn pinc ond lltoh juhifi-rtTh 6n unaeotory 6f UucOurAt vhcotqw, lndion riagtas, l)loming .big . soobOru.*, ond muttongtis. Othcr Pbnb tho{ choroctcn'zc this sttc orc bottbbtusl'-iuliioi, intclow biitctbrlgh, ond truc mountoinmohogqny. Ihc owtogo onnuol of notite undcrctory Ycgatotion is obout &0 pouMs per ocrc' lf thc runEc condition dcteriomta, l4yoning big sogabrlslr, ond annwl ,dt ;iins in obundoncc. tlccho;icot tteotmcn{ b not pmcticol bcous of thc wy stoo/ surfocc ond thc slopc. suitoblc monogcmcot.-2to.ctice includc.propcr _ortrno it* ond o olonncd cizirrg qystcm. fhc-elopc liinib occc* by lit166lt96.,k fhc Tinitai occ*ibitity'tgults ii ovefudzirg of thc lc56 sbping otuos..Sclcctivc thinnino of thc ofnwn ond iunipci stoncts impovs tlc gwly of thc un&rstoty for g;zing ond'proviaes fireudod, posts, oN Christnos troos. fhe Tridelt soit is suitcd to timitd ptoduction of pinlon pinc ond uoh iunipr.-lhc onigi ornwl prduction t:s 5 cords ry ocre: ihc- ovuoge stocktttg rotc is 150 ioti'pt, ocre.'7o cnsunc sustoined ytelds- ond- continucd usc, thc kind of tod ordiction shoutd b considqed bcf6rc the ston& orc thinncd or claord. Sryial'""n it nded to minimize qosion rhcn the etords ote thinncd or clcorcd. ithning the stonds gcncmtly promotcs thc grotth of undcntory gftrsrq, ord louttg trpas. onl thc lcstr sloping ora,os of this unit orc suited to hom*itc development lhc i6in timitotions'oti uc sbry ond stonincsr.. Etosbn is o hozord in thc stccpcr ooos. biy the port of th'stlc thot is used for consbttction should bc dbturbd. Topsoil cin Oa itoc*pca ond usd to rccloim oreos dtlstuded d-uring utstntction. Ttie gruwl ond cAOt* in disturbcd oraos shdrld bc tunoved if thc sitc b londicopcd, poriiculorty in oreos uscd for layns. Anos odioccnt .to hillsids ore ""coiir"ib -offcctcd 'by runofti rhich moy bc occornponiid by tlte mowrnail of i* a"Or6. Populobbi gtotth hos tcsuftbd in irrcrcobcd consb1rction of honrc in oreos of this unil This mop unit Pinyon-Junipcr sitc. is in capobility subcloss Wle, nonitigotcd. fhc Tn.'dell soil is in the voodlahd eiie, od thc Brovnsto soil is in the Stony Foothills rungc SECTI2N a:70(B) SOruS DESCRIPTIONS 57sU-ttldNlnDrout U JK015O2F lmt,OS-oa-oo,b tb. SCHMUESER GORDON MEYER, INC. I I 8 W. 6TH STREET, SU|TE 2OO GLENW@D SPRINGS, COLORADO B I 60 I(970) 945-lOO4 FAX (970) 945-5944 ASPEN, CoLoRADo (97o) 9?557"7 CRESTED BurrE, CO (97O) 349-5355NGIN e 151 Aspen-GYPsum Area, Colorado TABLE 4.--ACREAGE AND PROPORTIONATE EXIENT OF THE SOILS So11 name tl I Eagle lGarfield I County I county AreaP itk in County ntExt€ Map I syrnbol I AcreEI Acres Acr€s 0 0 13? 1,184 65 Acres 1 2 3 4 t 6 I lAcree very stony sandy loan' lAcree very 6tony sandy foam' lAcree loaln, 3 to 6 Percent sI I 369 I 413 I 1, 455 I 820 I 2, ?50 I lAcrec loarn,6 to 12 Petcent a I 12 percent sloPes--- | 25 percent sloPes I ---------l---------l ---------l 3to 12 to oPes- lopes 0 0 183 325 289 702 369 413 7?5 329 104 723 1 I 9 Pct I I 2 4 R 0. 0. 0. o. 0. 1.lAcree loam, 12 to 25 percent sIoPe lAl loanr, 1 to 12 sI oan,to Pe opes----- I Anse l-Anvik association,12 to 25 Percent slopes------ | (?40 881 590 I 6,820 I I 8, 133 I I 18,410 I I 5,068 I 2, 550 I 2,614 I 231 I 600 I 3, 80? I I t6, 842 I I 10, 216 I 6,112 I 1, 031 I 2,951 I ?811 780 I 21,3411 2, 086 I 1291 2,488 I I 1, 425 I I 3,174 I 7,212 I 1, 590 I 16,?991 53? I ?38 I 156 I 0l 1,3?1 I 1,5?8 I 1, 611 I I 1, 538 I I 3,135 I I 3, 80? I 3, 585 I 0t 0t 0l ?31 3?l 2, 859 I 2,205 11, 2 90 10,462 2?,508 10, ?43 9 lAncel-Anvik association' lO lAnvil-skylick-sligting a 25 to 45 Percent sloPes-----'- | ssociatjon, 10 to 25 Percent I slopee-----association, 25 to 50 Percent I11Anvlk-SkYl ick-sl igt lng slopes--'------- l2 ArIe-Ansari -Rock outcroP conPlex, 12 to 50 Percent s 1 ope c-- compl ex, 3 to 6 Percent sloPes------- I13 lAtenclo-Azeltlne 14 lCalllngs-YelJack comPl ex, 25 to 55 Pelcent sloPes----- 15 lCharcol-Mord comPlex,12 to 25 Percent sloPes--------- 16 lCharcol-Mord comPlex,25 to 50 Petcent sloPes--- 1? lcochetoPa-Antrobus as sociation, 6 to 12 Percent s 1 opes 18 lcochetoPa-Antrobus as soclatlon, !2 to 23 Pe!cent I slope6---- 19 lCochetoPa-Antrobus ass ociation, 25 to 50 Percent I slopes--------ro lCoulterg loam,12 to 50 Percent sloPes--- Cutecantl-Fughes comPlex,6 to 12 Percent sl opes--- Curecant i-Fughes cornPlex,72 to 25 Pelcent sloPes--- .J Cushool flne candy loam,12 to 25 Petcent sloPes- 25 to 50 Percent sloPes------ 197 5,963 1,868 480 2,343 0 0 0 21, 903 6,615 4,931 23't 600 3,880 12,852 6,242 1,031 2,951 ?81 ?80 27 ,645 2,086 ?85 3,230 24 lCuohool fine sandY loam' 25 lCushool-RentsaccomPlex' I 5,061 I I 2,635l| 130 I 0t pr 0t ot ! ,127 I 0t 56 t 't 42l| I 491 0 0 0 0 0 0 0 4, 583 015 to 65 Percent sloPes------ 26 lDahlqu lat-Southace comPlex,5 to 12 percent sloPes---- I 21 lDahlqul st-Southace conPlex,12 to 25 percent sloPes--- | 2A lDahlqui st-southace comPlex,25 to 50 Percent sloPes--- I 29 lDollard-Rock outcrop, shale conplex, t2 lo 25 Percent I -----lI slopes 30 lDollard -Rock outcrop, shale comPlex, 25 to 65 Percent I slopes-- . 31 lDotseto gravellY sandY 1oam,5 to 25 Percent sloPes--- 32 lDotsero sandy loam, 1 to l2 Percent sIoPe6---- 33 lEarsmen-Rock outcroP complex, 12 to 55 Petcent slopes 34 lEnrpedrado loan, 2 to 6 percent sloPes----- 35 Empedrado loam, 6 to 12 percqnt sloPes----- 36 Empedrado loam, 12 t o 25 percent EloPes--- 3?Etoe foam, 15 to 50 pelcent sloPes----- 38 lEvan ston loanr, I to 6 Percent slopes----- 39 lEvans ton loam, 6 to 25 percent slopes----- 40 lEvanston loarr,25 to 45 Percent sloPes----- 41 lEvanston loanr,45 to 65 Percent sloPes- 42 lFluvaquents, 0 to 10 Percent sloPes- 43 lForelle-Brownsto cohP lex, 6 to 12 Pe rcent sloPes------ 44 lForelle-Brownsto comP lex, 12 to 25 Percent sloPes----- 45 Forsey cobblY loam, 3 to 12 Percent sloPes- 45 Forsey cobblY loam, I 2 to 25 Percent sloPes----- 41 Forsey cobblY loam, 2 5 to 65 percent sloPes----- 48 lFughes stony loah, 3 to 12 Percent sloPes-- '' 49 lGoslin fine sandY loam'3 to 6 P€rcent sloPes--------- 50 lGoslln fine sandY loam'6 to 25 Percent sloPes-------- 51 lGothlc loam, 1 to 6 Per cent sloPes t \2 lGothic loam, 6 to 25 Pe rcent sloPes---------- Gothic loan, 25 to 65 Pe lcent 6loPes---------- lGrotte g ravellY loam,25 to 65 percent sloPes-- I and siortbids opes------ 1?5 0 0 R ( ( 52s I 88? I 8?9 t 894 I 1, 528 I 0t 7,72'l I 126 I 695 I 0t 742 I 627 I 619 I 383 I 81t 0t 0t 0l 1,6841 I 2,955 I 0t 0l 6,085 I 260 I 801 I 32 I 0t 781 I 534 I 1, 531 I 5421 1, 455 I 0t 0t 19 t 1,612 I 3,397 I 0t 389 t e88 I 0l 1, 309 I 5, 118 I 544 t I 143 I 2,336 1?,193 !,272 1,590 29,012 5,058 6,164 ?13 88? 3,031 628 13,844 0 0 188 261 223 4 ,259 Eqo 161 ,930 ,451 ,499 ,494 ,811 ,806 841 2,841I 3, 731 I 6,123 I 4, 400 I 12s I 3,3481 8, 804 I 1, 475 I ?,?881 162 I 1,9201 3,245 I 544 I 1 5 4 o 1 't 11 2,692 4 ,214 544 2,604 8,439 5,415 a5 I s See footnote at end of table' ex 12 to 65 rcent 7,295 I 3,321 I 4,18?l I 2'1 ,933 I 30, 94 1 0.3 1.8 1.6 4.3 3.4 1.? 1.0 0.8 0.1 0.6 2.O 1.0 0.2 0.5 0.1 0.1 4.3 0.3 0.1 0.5 0.4 2.'1 0.2 0.3 4.4 0.9 1.1 0.1 0.1 0.5 0.? t.2 0.1 0.9 0.7 r< 0.2 t.t 1.8 0.1 0,4 0.? 0.1 0.4 1.3 1.0 4,8 I 152 TABLE 4.--ACREAGE AND PROPORTIONATE EXTENT OF THE SOILS--Contlnued Soil name tot a Map ymbo I Eagle I County Acres Gar fie ld County Acres PitkIn County Ac!es Area res 56 5? 58 59 60 61 6t 63 64 65 66 I I Ipson cobbly 1oam, 3 to 25 Percent slopes------------- | I tpson cobbly loam, 25 to 50 percent sloPes------------ | I lrrauaddy very stony loam, 25 to 65 percent sloPes---- | llyers loam, 6 to 25 percent slopes-- -------l llyers ]oam, 25 to 55 percent slopes-- ------l llyers silty clay loam, 6 to 25 percent slopes---------l llyers silty clay loam, 25 to 65 percent slopes--------l lJerry Ioam, 12 to 25 Percent slopes-- ------l lJerry loam, 25 to 65 percent slopes-- ------l lJerry-Mil1er1ake 1oams, 1 to 6 percen! slopes---------1 lJerry-Millerlake loams, 6 to 25 percent slopes--------l lJerry-Millerfake loams, 25 to 45 percent slopes-------l lJodero loam, 1 to 12 percent sloPes-- ------l lKllgore silt loam-- ------------- | lKobar silty clay loam, I to 6 percent slopes----------l lKobar silty clay loam, 6 to 12 percent slopes---------l lKobar sllty clay loam, 12 to 25 percent slopes---:----l lKobar silty clay loam, dry, 3 to 25 Percent sloPes----l lLeavittville loam, 4 to 25 percent slopes-------------l lMillerlake Ioam, 15 to 30 percent slopes--------------l lMine loam, 12 to 25 Percent slopes-------------------- I lMlne loarn, 25 to 65 percent slopes--------------------l lMlracle ]oam, 3'to 30 percent slopes-- -----l lMoen stony Ioam, 1 to-6 percent slopes----------------l lMoen stony Ioam, 6 to 12 percent slopes---------------l lMoen stony ]oam, 12 to 25 percent slopes--------------l lMonad fine sandy loam, 12 to 25 percent slopes--------l lMonad fine sandy loam, 25 to 50 percent slopes--------l ?401 233 I 33? | 2,419 I 1,656t 1,410t 968 I 949 t 5, ?03 I 2,294 I 6,6'16l 0,895 I 211 I 1, 415 I 226 I 1,014 I 591 I 9111 1561 2,1861 0l 90 I 3.394 I I ,293 I 1,944 I 505 I 1,0?4 I 843 I 3501 351 I 353 I 462 I 1,123 I 280 I 1,0491 5,159 I 50? I 494 I 3,212 I 2,119 I I 1, 100 I 337 I 134 I 3,991 | I 42,196l| I 12,t28 I 402 s31 1, 855 689 0 0 0 98 395 341 138 698 I 3,112 I 1, 953 I 306 I 2,162 2,994 2,792 3,108 1,656 1,410 968 2,488 18, ?35 36 7't 22 1? 91 o2 30 18 11 95 1 z 3,2 11, 9 16,1 8 3r0 1r0 3r g 1,9 9 1,8 020 230 0 0 0 0 0 944 035 919 924 0 0 0 28 0 516 0 lMorval Ioam,1 lMorval Ioam, 6 lMorval loam, 25 595 I 3,996 I 2441 2,1891 3,264 I 234 I 693 I 188 I 436 I 49 t 0t 1, ?391 1, 650 I 0t 0t 0t 0t 0l 0t 0t 0l 0t ?31 I 139 I 4,1191 0t 178 I s31 I 401 t,727 | 0l 2,605 | 9,254 I 989 588 2, 480 1,218 0 0 0 309 1, 321 o 0 0 0 0 0 360 9 61 68 69 ?0 ?1 12 13 74 ?5 16 't7 18 19 80 81 82 83 84 85 86 8? 88 89 90 91 92 93 94 95 95 9'l 98 99 100 to6to 25to4 percenL slopes-------------------- |percent slopes------------------- | 0 pelcent slopes------'-----------l s19 I 66t 35? 691 t24 3,836 309 1,411 3,394 1,293 1,944 505 1,0?4 843 710 2, o6t 7,426 5, 115 5,948 2, 411 1,793 502 3, 966 280 4,204 14,932 5?1 1,246 4,244 2, 981 lMorval-TrldeIl complex, 12 to 50 percent sJoPes-------l lMoyerson-Rock outcrop complex, 15 to 60 percent slopesl lMussel loam, 1 to 6 percent slopes--- ------l lMussel loam, 6 to 12 percent slopes-- ------l lMussel loam, 12 to 25 percent slopes-- -----l lRedrob loam, 1 to 6 Percent slopes--- ------ | lRogert very stony sandy loan, 25 to 65 percent slopes I lshowalter-MorvaI complex, 5 to 15 percent slopes------l lshowalter-MorvaI complex, 15 to 25 percent slopes-----l lsouthace cobbly sandy loam, 1 to 6 Percent sloPes-----l lsouthace cobbly sandy loam, 6 to 12 percent slopes----l lsouthace cobbly sandy loam, 12 to 25 percenl slopes---l lsouthace iobbly sandy Joam, 25 to 65 percent slopes--- lstarley-starman very channery loams, 3 to 25 percent I slopes---- lTanna-PinelIi complex, 1 to 6 Percent sloPes---------- lTanna-PineIli complex, 6 to 12 percent slopes--------- lTanna-PinelIl complex, 12 to 25 percent slopes-------- lTorrlorthenLs-Canltorthids-Rock outcroP complex, 6 to | 65 percent sloPes----- lTorriorthents-Rock outcroP complex, 45 to 95 percent lslopes--.-- 991 | 5,948 I 2,299 I 1,234 I 550 101 L02 103 104 1,351 0 0 0 o 0 0 0 2, 45t 337 ?34 3,99? 105 4,17 4 0 044,1 1,450 Soil Su 0.3 ,0.50.J 0.5 0.3 0.? 0.2 0.4 2.9 0.5 1.9 2.5 0.1 0.5 0.2 0.6 0.30.I 0.3 0.6 0.2 0.5 o.2 0_1 t -- 0.1 0.3 0.2 0.8 0.9 0.4 0.3 0.1 0.6 I 0.7 2.3 0.1 0.2 0.7 0.5 0.4 0.1 0.1 0.6 n ) ?.5 2.L ?o 0.4 o.2 106 Tridell-ston sand loams, 12 to 50 opes,reme ys 107 lUracca, moist-Mergel comPlex, 1 to 5 percent slopes, I I extremely stony------ ---------- | lUracca, rnoist-Mergel complex, 6 to 12 percent slopes, I I extremely stony------ ------- I lUracca, moist-Mergef complex, 12 to 25 percent slopes, I I extremely stony------ ---------- I lUracca, noist-Mergel comPlex, 25 Eo 65 percent sloPes, I I extremely stony------ ---------- | see footnote at end of table. 108 109 51,6?4 13,5?8 24,901 2,543 1,535 1,400 3,836 I 770 65 195 146 '149 ?05 450 ?11 1 113 295 543 52 110 1,280 I 16 40 0.6 'ri Exte P": ony----------- I Sol! Survey 154 TABLE 5.--LAND CAPABILITY CLASSES AND YIELDS PER ACRE OF CROPS (Yie]dsintheNco]umnsarefornonirrigatedsoi]s;thoseinthelcolumnsareforirrlgatedsoils.Yields are those that can be expected utd"i t high 1evel-of management' Absence of a yield lndicates that tbe soll ls ,,ot .rrfi.a to th; crop or a;"-";;; generally is not grown on the soll) Grass haY BarleyLand capabilitY Alfalfa haYSoiI narne and map sYnrbol I N IN Acree Acree Acree Acree N IVe vIe IVe Ive VIe Ive Ive IVe Ive Ive Tons 5.0 5.0 5.0 6.0 Tons ons 4.0 4.0 4.0 5.0 Bu 90 80 80 Anse I -Anvlk 9---- ------ Ansel-Anvik 1 Anvik-SkYI ick-Sl i9t ing 1 1 -- ------- Anvik-SkYI ick-Sl igt ing t2, -------- Ar 1e-Ansar i-Rock outcroP 1 3- --- ----- Atenclo-AzeIt ine 14--------- Callings-Yeljack 1 5 -------- - Charcol-Mord 1 6--------- Charcol-Mord 1?,18----- CochetoPa-Ant robus 1 9- -------- CochetoPa-Ant robus see footnote at end of table' e Ie Ie fe Ie vIe vI v vI VI vI v VI VI vI Ie Ie Ie Ie Ie VIe VI VI e Ive 5.0 4.0 ?0 II 30 30 30 156 Soil Su IABLE 5.--LAND CAPABIL]TY CLASSES AND YIELDS PER ACRE OF CROPS--CONIINUCd So11 name and map symbol Land capabl Ilty Alfalfa hay Grass hay Bar ley NIII N I N I N I 42--------- Eluvaguents {3--------- Fore I le-Broxnst o q4--------- Forel le-Brounsto 4 6--------- For6ey Forsey 4 8-- ------- Pughes 55-----------------------:- Iev VI Ie I I VIU IVe VIe vIe Ve Ve e e e fe Ie II VI VI VI v1 VI VI eVI IVe IVe VIe VIe Vfe Tons Tons 5.0 4.0 04 4.0 {.0 Tons Tons Bu Bu 4.0 3.5 3.0 ?q 3.5 ?5 G un s iorthids 58 I r rawaddY Iyers see footnote at end of table' e Ie Ie VI VI VI VI IevI eVI e 159 Aspen-GYPsum Area, Colorado TABIJS.--LANDCAPABILITYcLAssEsANDYIELDSPERACREoFcRoPs.-continued Land capabi 1 i t Alfalfa haY Grass haY BarleY soll name and nap symbol ,J05r------- Torr I orthent B-Rock outcroP 105-------- Trldel l-Brounsto Ie ]I VI VI 4.0 ?q {.0 5.0VIs vIc IVe l0?-----------------------| vrs Uracca-Mergel I I 108-----------------------l vfe Uracca-Mergel I I vIe vI Ie VI 1e VI Ie :09-------- Uracca-l'lergel :1 0-------- Uracca-Mergel 1 1 1-------- Vandanore I 12-------- tioodha I I .3---------- tloos leY vIe 5.0IVe vIe I t.. [, I 11 q- Yarno Yeno Yel Jacl-Ca ll lngs 1l 8-------- Youga Zlflnan : 1.1, VI VI C VIe le [, r see descrlption of the maP unlt for conposition and behavlor characteristice of the map unit lI NII Tons Tons ons BuBuTons 160 TABLE 5.--RANGELAND AND WOODLAND UNDERSTOR (OnIy the soils that support rangeland or woodla I So11 name and I Range or woodland siLe map synbol I I Loamy Slopes 1303----- Mountain Loam 1228-- lLetternan needlegrass---------l 10 lMountain big sage-------------l 10 , lldaho fescue----- --l 10 I saskatoon servlceberry-------- I 5 Almy 8r, 9r : Ansel------ Anvlk- 10r, 11r: Anvlk------ skyl 1 s1 tgt lng--- lRolling Loanr fl298-- lFavorable I I lNormal I I - lUnfavorable I t,llllrtrl ISpruce-Flr- lFavorableI lNormal I Unfavorable I I ISpluce-Fir- lFavorable lNormil I Unfavorable I I I I IAspen.------ lFavorable I Norma I I Unfavorable I I I I lNormal I Unfavorable Favorable Norma I Un favorable I Bluebunch wheatgrass---------- | I Needleandthread--------------- | I Sandberg bluegrass------------ | lwyohing big sagebrush--------- I I Bott lebrush sguirreltail------ | I Indian ric ass-------------- | lt I Sedge----- --------- | I Slender uheatgrass------------ | I Boxleaf myrtle---------------- | I Dwa!f blueberry--------------- | I Heart Jeaf grnls6----- I lElk sedge- I Slender wheatgrass- lBoxleaf myrtle----- lDwarf blueberry-- I Heart leaf arnica----- Nodding bromegrass- lThurber fescue----- lParry oatg!ass--- I Idaho fescue----- lNodding bromegrass- I Muttongrass---------- lBearded wheatgrass- I lThurber fescue----- lParry oatgrass--- I Idaho fescue----- lBearded wheatgrass- lNodding bromegrass- I Muttongrass---------- lMountain snowberry-- I lArizona fescue----- lNodding bromegrass- lBearded wheaLgrass- I Snowberry- I 1, 100 950 650 300 250 1?5 300 250 1?5 3, 5oo 3,000 2,000 3, 500 15 10 10 10 EJ( 15 15 10 10 10 15 15 10 10 10 R 10 10 10 5 q 5 3, 000 2,000 10 10 10( q 5 q see footnote at end of table. 2,000 1,500 1, 000 30 20 10 10 -., 1 SurveyjSoil Tot a I Procluct l. on I I Compo- I sition I lKind of year I II Dry I weight Characterist ic vegetat ion Favorable No rma I Unfavorable Favorable No rma I Unfavorable LDlacre I Pct 1,200 15 15 10 10 10 10 10 10 900 500 1, 800 1, 500 1, 000 Aspen-GYPsum Area, Colorado JI,E 5.--RANGELANDANDwooDLANDUNDERSToRYPRoDUCTIVII]ANDCHARACTERIsTIcPLANTCoMMUNITIES-.continued Soll nane and nap sYnbol litarman---- lr, 102r, 103r: 05r : Trldel 1---- Brownsto---------- I S tQlr, t08r1 109rr 110r: Uracca----- Hergel----- I 11--------- Vandamore Tota Range o! woodland slte Xlnd of Year Dry ExPosure {235-----Favorable Norrna l I Unfavorable I I I I clayey Foothills f28s--------- li:;;:i"'" I Unfavorable I I Clayey Foothills il289--------- lFavorable I Norma I I Unfavorable I P inyon- JunlPer--------Favorable Norma l Unfavorable tony Footbills {28?--- lFavorable I Norma l I Unfavorable Stony Loam 1231-------Pavorable Nornal Unfavorable Stony Loam {23?------- lFavorable lNormal I Unfavorable Loamy Slopes {303----- lFavorable I Norma l I Unfavorable See footnote at end of table' 169 Characterlst 1c vegetetlon Bluebunch wbeatgrass- Needleandthread--'---- Indian ricegrass-- I ninter fat- lFringed sagebrush-- I I I tlestern htheatgras6- I Mountain big sagebrush-------- I Indian rlcegrasG-- I BottlebruEh squirreltall------ I lvle6tern wheatgrase- lMountaln blg sagebrush-------- I lndian ricegrase-- I Bott lebluEh squlrrelttll------ I I Compo- I slt lonDry we I ght Lb/acre 1 500 400 300 1,200 900 600 400 300 200 800 600 400 2, 000 1,200 1, 000 000 200 000 1,200 900 500 200 900 600 20. 15 1s 10 10 40 20 5 5 10 10 10 5 5 5 R I Muttongtaa lwyoming b19 sagebrush----- lBlack sagebrush-- ----t----l 40 20 E E 20 10 10 C 5 5 Bluebunch h,heatgraaE----------l 20 saskatoon 6ervlceberry--------l 15 Antel blt erbrush-- I l,iestern Hheatgresa- I Needleandthread------- Inyoming big sagebrush--------- I Indlan !icegtaB6-- I Bott lebrush squ1rreltall------ lUtah JunlPer------o-- lMountain blg sage------------- | I Indian ricegrass-------------- i I Needlegras lAntelope bltterbrush I I Bluebunch wheatgrass- I Saskatoon servlceberry-------- lMountain bi9 6a9e--- I Mut t ongra s s- -----'--- I lndian rlcegrass-- I Needlegras lAnteloPe bitterbru6h I I True rnountainmahoganY lAnteloPe bltterbrush lBeardless wheatgrass- I tlestern lrheatgra ss- lPrairie junegrass-- I Indian ricegrass-- lMountain big sage--- 10 B q R z 1 I 20 15 10 10 t E ( 15 15 10 10 10 10 10 on ctP Bluebunch uheatgrass---------- | Indlan rlcegtaas-- Need J e a ndt hre ad- -- - -- - Nevada bluegrass-- 172 Soil TABLE ?.--WOODLAND MANAGEMENT AND PRODUCIMTY--Conti.nued soif name and map syrnbol I I Ordi- lnation I symbol I P- ment limita- tion Management concerns I Seedllng I wlnd- mortal- | throw ity I hazard PIant compet i - tion Potent iaI produc t ivi ttl Comrnon trees lSite lProduc-l index I t ivlty I classr Trees to plant 3 ?-- ------ ------ Etoe ?6,77------- Mine 8?tr: Morval. Tr idel I -------- 88rr: Moyerson------- Rock outcrop. 106ir ! Trldel l'------- BrownBto. 1 1 2------------- Iloodhall 4A 5A ights1 ightSI Moderate Moderate I Moderate I I Moderate sIi thr Severe 19ht ight s s Douglas fir--------- Ponderosa pine------ lwhite fir I I lLodgepole pine-----. lEngelmann "prr".---llSubalpine fir------- lQuaking aspen------- P inyon----- Utah juniper-------- 72 4 q 4 2 Douglas fir, ponderosapine, white flr. Lodgepole pine, Enge lmann spruce, subalpine fir. '16 70 Severe Severe Severe - reveSe reveSe Severe ightsl Seve!e tt I Severe Itl sli s11 tht 19hts1 P inyon----- lUtab juniper-------- I ttght lPinyon--------------l I Utah juniper-------- | Douglas fir--------- lPonderosa pine------ I 2F ights1 ghtsl 48 r productlvlty class is the yield ln cublc meters per hectale per year calculated at the age of culnrlnatlon of mean annual increment for fully stocked natural stands. il See descriptlon of the map unlt for composition and behavlor characteristics of tbe map unit I I I I 173Aspen-GyPsum Area, Golorado TABLE 8.--RECREAT]ONA! DEVELOPMENT (some terms that descrlbe re6trictlve soil features are deflned 1n the Glossary' see text for deflnltions of rsllght,r Dmoderate,'and nBevere.' Absence of an entry indicates that the aoll was not rated) P laygrounds Paths and tral]s Golf falrwaysCamp atea6 Picnic areasSoll name and map sSrmbol Moderate: large stones Severe s1ope. Hoderate: dusty. Moderate: c I ope. dusty. Severe: slope. Moderate: large stonea. Severe: s1 ope . I Moderate : dusty. Moderate: s I ope, dusty. Severe: slope. I Moderate : I dusty. Sevete: large 6ton€4, slope. Seve!e: large stones, s1 ope . Moderate s I ope, dusty. S€vete: slope. Severe: slope. I severe: I slope. sIight---------- Moderate: slope. Moderate: dusty. Moderate: dusty. I Moderate I slope, I du6ty. I Moderate 3 I dusty. Moderrte: large stones. Severe: slope. Moderate: slope. I Severe: I slope. I I sI tght I lghts1 lllloderate : I dustyrlmy 1 Almy 8r:Ansel------ Anvl L ot. Ansel ------ l0t: Anvlk------ skyl i ck-- ---- sl i9t 11i: Anvlk------- Severe: slope. Severe: slope. Severe: slope Sev€te: slope. Severe: slope. Severe: slope Severe: slope. Sevele: slope. Severe: elope. Severe: alope. Sevele: slope Severe: elope. I severe: slope. I Severe: slope Severe: slope Severe: s1ope. Severe: Severe: slope. Severe: sl ope Sevele: slope. Severe: slope. Severe: slope. Severe: slope. Severe: slope. Severe: large stones, s I ope, small stones. Severe: I Moderate: I slope, I ducty. I I I Severe: erodes easllY. Moderate: slope. Severe: s 1 ope, erodes easllY. Severe: slope. Moderate: slope. Moderate: slope I Moderate: large stones, s1ope. Severe: Sevete: slope. I Severe: alope Severe: slope. I Severe: slope. Severe: slope. I Severe: sl ope Severe slope. Severe: large stones, slope. Severe:Sevele: slope. See footnote at end of table slope.s1ope.slope.slope. 178 Soil Survey IABLE 8.--RECREATIONAL DEVELOPMENI-.CONt1nUCd So11 name and rnaP symbol Camp areas Picnlc areas P I aygrounds Pat hs and tra lls Golf falrways Pughes 55r: Gypsum land. Gypslorthid Irrawaddy sl ight--- -------sl 1ght---------- s 1 1ght ---- -- -- --sl ight ---------- Severe: lSevere:slope. I slope. Is1ight---------- I sIlght---------- I I I Severe: lSevere: slope.slope. Severe:Severe: slope.slope. Severe:Severe: slope.sIope. Iyers Severe: s I ope, depth to rock Moderate: s 1 ope, large etones, dusty. Severe: slope. Severe: sIope. Severe: slope. Severe: slope. Seve!e: slope. Severe: slope. Severe: slope Severe sIope. Severe: s I ope, depth to rock. Moderate: s I ope, large stones, dusty. Severe: slope. Severe: slope. Severe: slope. Severe: slope. Severe ! slope. Severe: slope. Severe: slope. Severe: Severe: slope. Moderate: s I ope, srnaf I stones. Severe: slope. Moderate: s lope, small stones. Severe: s1ope. Severe: slope. I Severe: I slope, I small stones Severe: s I ope, depth to rock. Severe: large stones, slope. Severe: large stones, slope. Severe: Iarge stones, slope. Severe: slope. Severe: slope. Severe: slope. Severe: slope. Severe: slope. Severe: sl ight---------- s I ight---------- I Moderate: slope. s I ight ---------- I Moderate: slope. Seve!e: slope. Severe: slope. Severe: slope, erodes easlly. I Moderate: large stones, dusty. Severe: slope. Severe: slope. Moderate: slope. Severe slope. Mode!ate: s lope . Severe: slope. Moderate: slope. Severe: l I 6 Jerry See footnote at end of tab]e. slope.s1ope.slope.slope. ightSI ightsl Moderate: large stones. I Severe: slope. Severe: slope. Severe: slope. Severe s slope. Severe: s I ope,thin Iayer. Moderate: large stones, slope. Severe: slope. Severe: large stones, slope. Severe: slope. Severe: slope. Severe: slope. Severe: slope. Severe: sIope. Severe: Soil Survey 182 TABLE I.--RECREATIONAL DEVELOPMENT--Continued So11 name and map sYmbol 102r: Tanna------ P lne 103': Tanna------ P 1ne1 I l---- 104r: Torriorthent s-------- Camborthlds Rock outcroP. 105r: torr Iorthent s-- -- ---- Rock outcroP. 105r: fridell---- Brot nsto--- 10?r: Uracca----- Merge 1----- 108': Uracca----- lIt-------- | Moderate: slope, dustY. Camp areas Moderate s 1 ope, dustY. Severe: slope. Severe: slope Severe: s 1 ope, depth to rock. Va r I able------- - Severe: s I ope, depth to rock. Severe: slope. Severe: s1ope. Moderate: large stones- Moderate: Iarge stones, dusty. Moderate: s lope, large stones see footnote at end of table' Plcnlc areas Mode rate : s1ope, dusty. Moderate: slope, dustY. Severe: slope. Severe: slope. Severe: slope, depth to rock- Varlable-------- S€vere: s Iope, depth to rock. Severe: s1ope. Severe: slope Moderate: Iarge stones I Moderate: large stones, dusty. Moderate: s 1 ope, large stones P laygrounds I Severe: slope. Severe: elope. I Severe: s lope . Severe: slope. Severe: s I ope, snall stones, depth to rock. Va r iable-------- Severe: s Iope, snall stones, depth to tock. Severe: smafl stones Severe: s I ope, small stones Severe: 1ar9e stones Severe: large stones Severe: large stones, sloPe. lPaths and tralls I I I I I I Moderate : I du8ty. I I I Moderate : duBtY. Moderate: s lope, dusty. Moderate: slope, dusty. I Severe: sIope. Variable-------- Moderate: large stones. Severe: s Iope I Moderate: Iarge stones. Moderate: Iarge stones, dusty. I Hoderate : I large stones. I l Golf fairwaYs Moderate.: sIope, depth to rock. Moderate: slope. Severe: slope. I Severe: slope. I severe: slope, depth to rock. Variable. Severe: slope, depth to rocl. s lope . Severe: Iarge stones, s1ope. Severe: large stones, droughty. Moderat e : large stones, droughty. Severe: Iarge stones, droughtY. I I I I I I I I Severe: | . slope. I I I I I I severe: 184 Soil Survey TABLE 9.--I{ILDLIFE HABITAT (see text for definitlons of "good," "falr,'"poo!," and "very poor." Absence of an entry lndlcates that the soil was not rated) Potentlal for habitat elernents I Potential as habitat for-- Soil name and map synrbol I I Gra sse s I and I legurnes alnGr r{lld I Iherba-lConif- ls ceous I erous I plants lplants I I I I Open- tbs I WetlandlShaIIow I Iand I plants I water I uild- I lareas I 1lfe and seed croPs uhr wood- land wi 1d- 1l fe I I Range- lWetland I Iand I wild- | wild- I llfe I life lr21314 Acree I I5------ | Poor I Fa 1r I I I Falr I I I lPair I Very POOr. I I lFair I Very POOr Fair.Very pool 5, 7--------------- lPoor Almy I Ot. Ansel------ 10r: Anvik------ skyl ick---' 11r: Anvlk------ skyl ick---- .sl t9t ing--- Very POOr. Poor Very poot. Vdry Poor ! I Very POO!. Very poor. Very Pool. Very POOr. very lPpoo!. I Very POOr. Very Poor. lVery lVery Poor. Very POO!. Very POOr. Very POOI.POOr. VeEy pool. Very POOr. Very POO!. poor. Very poor. Very I Very I poor. I I VeryI poor. I I Very POol. Very POO!. Very poor. Very PoQ'r. very POOr Very Poor. Very POor. ir lverypoor. Very POOI. Very poor. I Very poor. I Poo! I lFalr I Good Good lFal! I Good Good I Poor I I Very I poor. I Poor Pair Falr Poor Poo! Poor Poor Poo! Very poo: lFair. I I IF I I Good I I I Good I I I I Good I I I Good I I I I Good I I I Good I I I Poor I I I I Good I I I Good I I I Poor I I It--- I I I I I I It--- I I t--- I I Poor Poor air Good lra 1r 'air Poor odGo Palr irFa Good Fa 1r Good Fa 1r lr Fair r Fair Fair Very POOr. Very poor. ooIP Fair P P Good Good Fa ir Fatr Good Good Very POor. Very POO!. Poor Poor Very Poor. Very poor. Very Poor. Very' Poor Very POOr. IF oo! oor POOr. Good Good Good Veryod od Go Go sl igt ing--- Poor Poor Good air I Fair Fa I Very I poor. I I Very I poor. I I I Very I poor. I I Very I poor. I I Very I poo!. I I I Very I poor. I I Very I poor. I I I I I Poor lrPa Fair Pa 1r Fa Very Poor Very pool Very POO! Very poor Fa Poo VeryAnsarl-----Very Very poor.poor. Rock outcrop. t 2t. Atenclo---- AzeIt ine--- r a IP I I I I I IF I I IF I I t Falr oor air.Fair Poor 1r oor Fa PIF I I Very POOr Very poo see footnote at end of table. poor.ir Soil Su 186 o IABLE 9.--$ILDLIFE HABITAT--Continued Potent ia or habitat e lement s a I ndi1Soame ymbo Grain and seed herba- I Conlf- ceous I erous plants lPlants shrubs l{et land plants Shallow Hater areas maP Gra sses and legumes Open- land wi Id-'Ilfe ,otentlal as land ui Id- 11fe tat tlet Iand wi ld- ]1fd Range- ]and ui Id- Ilfe oPscr 22t. Earsman---- Rock outctoP 34,35,36--------- Empedrado 3 8------:-- Evanston 39, 40, 41--------- Evanston 42' -------- Fluvaguent 6 43r, 44r: Forel Ie---- Brounsto--- 45,46,41---'--"- ForseY 48 Fughes GosIin 51, 52------------- lPoor Gothlc I .' I S3--------- lvery Gothlc I Poor' I 54_-_-_-_---------- | very Grotte I Poor' oorP Falr Fair 1r ood Fa 1r Fa 1r Fair Fair 1rirFa air alr Good Good Fair oolP I I I Poor I I I It--- I I I Good I It--- I I t--- I It--- I I It--- I I I I I Poor I It--- I It--- I It--- I It--- I It--- I I I Poor I r Poor VerY POoi Poor Poor I Poor I I I very I poor. Fa G P P Po oor oor orI I Poor I I I I Poor I I I Poor I I I Poor I I I Poor I I I Fair I I I Poor I I oo!P Fal r rooP I lFa Fair cood IF I I IF I I Good I I I Poor oor I I IP I I I very I poor. I I Very I poor. E(t. Gypsum 1and. Gyps iorthlds------Very 56----------------- | Poor Ipson POor Very POOr. Very Poo!. Very rPoo poor. See footnote at end of table' r alr Good Fair Fa 1r cood Fair rooP Fair Fair taI ir 1r ir Fa Pa Fa lr 1r ir Fa Fa Fa Fa Very POOr. Very Poor. I Very Pool. Very POor. Very Poor. Very POor. I I I Poor I I I I lFair I I I Poor I I I Poor I I I Poor I I I Poor I I I I Poor I I I Falr I I I Fair I I I Falr I I I Fair I I I Poor Very Poo Very Poor r Poor Fa 1r Very poor Fa 1r Very POOr. Very poor. Very POOr. lVeryI poor. I I Very I poor. I lVeryI poor. I I Very I poot. I I VerY I poo!. I lveryI poor. I I Very I poor. I I Very I poor. I I Very I Poor. Very poor. P oor 1r lVerY POO!. Very POo Po or Poor r Very poor. Very POor Very poor. tPoo Very poor. I very I poor. I I Very I poor. I Very POor. r Very poo I Poor I I I Poor I I Po Fair or lrFa Very poor. Fa ir Very Poot. Very POOr. Very POor Very poor. Very poor. Vety Pogr. Very poor. Very POOr. Very. poor. Very POOr. Very POOr. Very POor. I Very poor. Very poor. Very poo Very poo Very Poo r r r ir II Fa Fa Fa Poo Pa ir Falr. r Fair Fair 1r. Good ir Fair. ir. Fair. oorP Pair. Fair. Fa Pa lFair I I lFair I I Aspen-Gypsum Area, Colorado TABLE 9. --TULDLIFE HABITAT--CONIINUCd 189 SolJ name and map symbol Gra 1n and seed croPs I I Grasses I and I legumes Potentla 1 tor habl tat eleme nts I Potent 1a.l as habltat for-- r{1ld herba- ceous p1 ant s Conl f- erouE pl ants rubssh I tietland lshallout Open- I and ui ld-lifepl ant s hrater area s Iiood- land wi 1d- 11f e Wet land wi 1d-life Range- I and ul ld-life 101': Plnelli---- J02r: Tanna------ r Pinelli-- l03r: Tenna------ Plnelli----J------ J04r: To.rrlorthent 6---'- Camborthlds Rock outcrop. l05r: Tottt orthent c----- RocI outcrop. 106r: I Trldel l----------- I VerY I poor. I Brounsto---------- | Very I poor. t0?r: uracca-----Very POOr. Mergel ---- - :09r, 109r, 1l0r: Uracca-----Very POOr uergel ---- Po Fa or ir olPo P P ool Fa 1r .rPoo Ve!y Very Very OIPo Poo I or oor Po Poor ool OI P Po oorP Poor pool I lVery I poor I I Very I poor I I Very I poor orPo oolP Fa ir Very Poor. Very poor. Very POOr. Ve!y POOr. Very poor. Fair I I 1:------- vandamore r 12-------- woodha I l al rF Fa 1r ItFa 1r ! r Poor raiF Poor 1rFa Poot Fair Fair Fair ir ir Fa Fa Fa alF -lF I I Very I poo!. I I Poot I rPoo Poor Poor see footnote at end of table. Pa 1r Fa 1r Pa 1r Fair Fair ootP Fa 1r 1rFa Fair Fair Fair Fa oor oor oor P P P rr ir Fa Fa poor lVery POOr. Very Very poor. Very PooI. Very POor. Ve!y Pool. Very Pool. Very POor. I very Poor. I I Very I poor. I I Very I poor. poor Very Poor. Very Poor. I V€ry poor I Very I poor I Poo r Poor Poor oorP fatF Very ftFa rooP r Fair Poor. Very poo Poor Poor Poor I I very I poor. I I Poor I Very Poor. poot Very poor. Very Poot. Poor Poor Poor Very poor V€ry PooI Poo r Ve!y Very orpo r Very poo Poo Poo r Poo I Fair Very Poor. Very POOr. I!aI Fair Pair. Falr. Falr. lr. oor IFal oor ir. Fair. ir. lr. ry Poor orPo ootP Ve Very poor Very POOr. Very pool. Very POOI. Very Pool. V€ry POO!. Very poor. Very poor I I Poor . r Very Poo: Very Fa P P Pa Very Poor Very Poor r r ooP Fa F Io,,.*n**, Area, Golorado 191 So11 nane and naP slrnrbol Icree ,Acree ShalJou excavat i ons Moderate: too claYeY. Severe: slope. Moderate: too claYeY. Modetate: too claYeY, elope. Severe: slope Dwel1in9s $,i thout ba sernent s Severe: shrlnk-swell Severe: shrink-strell, sloPe. I Severe shrink-suel1. Severe: sbrink-sweIl. 's"rer": shrink-sweIl, sloPe. Acree re€ TABLE 10.--BUILDING SITE DE\IELOPMENT termE that descrlbe restrlctlve solr features are defined ,n the Gl0ssary. see text for deflnrtions of "stisht,, ,mod€rate,,';;;-i"iu"r"." Ab";;;; of an entrv i";;";;;"-;iii-t-rt" soil tras not rated' The infornration in this tabre indicare6 the'i.ii"I"a-""ii.'."aiii."-ira-I""" iot eriminate the need for onsite lnvest lgat I on) DueI I ings uith ba sement s Severe: shr I nI- sue I l Sevete: sloPe, shrink-sue11 uoderat€: shrink-suel1. Hoderate: slope, shrink-swe11. Severe: slope I small I commercial I bulldings Severe: ihrink-swell I Severe: shrink-swe11, s1ope. Severe: shrink-strel J . I severe: shrlnk-sue11, slope. Severe: shrlnk-svre1], sloPe. LocaI roads and 6treet6 Severe: lou strength, shrink-swel1. I Severe: l,os strength, s I ope, shrlnk-suell. Severe: fou Etrength, ehrink-sglel1. Severe: lob, Etrengtb, shrink-sue11. Severe: low strength, slope, shrink-swell ' Launs and I andscapi ng I Modetate : large stones. Severe: slope. Moderate: slope. Severe: slope. s tht AInY AImY 1r, 91 3 Anse I ------ 1gr, 11i: Anvik------ skyl icI---- sl lgt ing--- 12r z ArIe------- Sevele: slope. Moderatc: shrinl-awe1I. I Severe : I slope. I I I S€vere : I sIoPe. I I Severe: Severe: slope. Severe: slope. Sevele: slope. Severe: slope Severe: large stones, slope. Severe: large stones, slope. Severe: depth to rock, sloPe. slope Severe: slope severii: slope. Severe: sloPe, large stones Sevete: s1ope, large stones ' Severe: slope, depth to rock 1n6ar i ----- see footnote at end of table slloht--------- I Modetate :- | shrinl-suell' I sloPe ' Severe: slope. Severe: slope. Sevele: slope. re slope. Severe: slope. I Severe: sIope, large stones. Severe: slope, large stones. Severe: sloPe, depth to rock. Moderate: shrlnk- suef f Severe: sl ope Severe: sl ope . I severe: slope. Severe: slope ' I Severe: I slope. I I Severe: s1ope, large stones I Severe: s I ope, large stones Severe 3 depth to rock sloPe. Severe 3 s lope . Severe: s1cpe. Severe: sloPe. Sev€ re slope. Severe: slope. Seve!e: s1ope, Jarge stones. Severe: slope, .lar9e stones. I Severe: depth to rock, sIope. Seve s1 ight S€vete: slope. Severe: sIope. Severe: slope. Severe: slope Severe: slope. Severe: Iarge stones, s1ope. Severe: lar-oe stones, s1ope. Sevete: slope, thin layer. rii Aspen-Gypsu m Atea, Colorado 195 TABLE 10.--BU]LDING S]TE DEVELOPMENT--CONIINUCd Soll name and rraP synbol Shallow excavat I ons Drel 1 ings rrl t hout basement s Dwellings ulth ba 6ement s Snall comrnerc i a J bui ldings Local roads and streets Lar,rns and landscaping Sevele: shrlnk-swe1l. Severe: shrink-suell. Severe: shrink-swe1l. Seve!e: low strength,shiinl-suell. 1ght I I Sl--------- lModerate: Gothlc I too clayey' I I 52,53'---- lSevere: Gothlc I sloPe' I I I 54--------- | severe: Grotte I sloPe' tcr. Gypsum land. Gyps lorthid I rrauaddY 59, 50, 61, Iyera 63, 6{----- Jerry 65r:Jerry------ MlllerlaIe- Mlllerlake- Severe: depth to rock, elope. Moderate: slope. Severe: s1ope. Severe: deptb to rock, slope. Severe: slope. Severe: slope Moderate: too claYeY. s I lght -- ------- Sevete: s1ope. Severe: sloPe. SI ight--------- 52- I Severe: strrink-svrell, slope. S€vere: slope. Sever€: slope. Moderate: shrlnk-svre11, s1ope. Severe: slope Sevete: sIope. Seve!e: shrink-suell, slope. Severe: shr lnk- swe I 1 , slope. Severe; shrink-swelJ. Moderate: shrlnk-suelI. Severe: shrink-swe11, slope. Severe: slope. Slight--------- see footnote at end of table' tht Severe: slope, shrinl-swell Severe: slope. Severe: depth to rock, s1ope. Moderate: s I ope, shrlnk- swel I . Severe: slope, Severe: deptb to rock, slope. Sevete 3 s 1 ope, shrlnk-suell ' Severe: s I ope, shrink- swe I I S€vere: shrink-suell. Moderate: shrink-sweIl. Severe: slope, shrink- swe I l S€vere: slope. sligbt--------- S€vere: shrlnI-suelI, s1ope. Sever€: slope. Severe: slope Severe: slope Sevete: slope. Severe: sIope. Severe: ehrink-svrell, slope. Sevete: shr 1nI-swel 1, s1ope. Severe: shrink-swel1. Moderate: shrJnk-swell. Sev€re: shrink-swel1, slope. I Severe: slope. Moderate: sJope. Severe: low strengthl s f ope, shrlnl-suel1. Sevete: slope. Severe: slope. Moderate: shr ink- swel l, s 1 ope, frost actlon. I Severe: l. slope. I lEevere: s1ope.' Seve!e: lohr Gtrength, slope, shrlnl-sueL l . I Severe: Ion strength, s I ope, shrinl-swe1 J . I Severe: lou strength, shrink-sue11. Moderate: shrink- swel l, lox strength. Severe: low strength, s I ope, shrink-swe11. Severe: slope. Moderate.: frost action, Sevete: slope. Severe: slope Severe: s I ope, thln layer. Moderate: large stones, s1ope. Severe: sIope. Severe: Iarge'stones, slope. Severe: slope. Severe: slope. slope. Severe: slope. thr tht sli sli Severe: slt s1 Soil Survey 198 TABLE 10.--BUILDING SITE DEVELOPMENT--Continued Soll nanre and map synbol Shallou excavat 10ns Duelllngs wlthout basenent s DweIllngsulth ba semenL s Small commercla l bui ld1n9s Local roads and streets Launs and I andscaplng 100r: starl€y---- Starnan---- 101r: Tanna------ PlneIll---- lMode!ate: 102r: Tanne------ PlnelIl---- 103r: Tanna------ PlrieIIi---- 104r: lorr i orthent s---- canborthlds Rock outcroP. 105r: Torri orthent s---- Sever€: depth to rock. Severe depth to rock. Moderace: depth to rock, too claYeY. too cIaYeY. Moderate: depth to rock too'cIaYeY, slope. Moderate: too clayeY, slope. Severe: slope. Severe: slope. Severe: depth to rocl, sIope. Variable------- Severe: depth to rock, slope. Rock outcroP. I I 106r: I Tridell---- | severe: I cutbanks cave' I sIoPe ' Severe: depth to rock. Severe: depth to rock. Severe: shrink-suell. Moderate: shrink-sweI1. Severe: shrink- sue I I .lModetate: shrink- swell, slope. Severe 3 shrlnk- swe I 1, slope. Severe 3 sIope. Severe: s 1 ope, depth to rock. Variable------- Severe: s I ope, depth to rock Severe: See footnote at end of table slope.slope.slope slope slope. Severe: depth to rock. S€vere: depth to rock. Severe: shrlnk-sweIl. Moderate: shrink-swell Severe: shrlnk-swe1l. Moderate: s I oPe, shrink-swe1l. I Severe: s l ope, shrlnk-sweIl. I Severe: slope, depth to rock Severe: slope, depth to rock. Severe: shrlnk-sYell. tlode rate : shrlnk-swel'1. Severe: shrinh-suell, slope. Severe: slope. Severe: shrlnk-sue I 1, s lope . Severe:Severe: slope slope. Severe:I Severe 3 depth to rock, I sloPe, slope. I dePth to rock' I Variable------- | Variable------- I I I I Severe: I Severe: depth to rock, I sloPe, sltpe. I dePth to rock' Severe:Severe: Severe: depth to rock. Severe depth to rock. I Severe: shr lnk-sueI 1, Iou strength. Moderate: shrink-sue1 1, Iow strength. Severe: shrink-sweI 1, low Etrength. Moderate: shrlnk-swe I 1, lor strength, slope. I Severe: shrlnk- swe I 1, lon strength, slope. Severe: slope. Severe: deplh to rock, slope. Variable------- Severe: depth to rock, slope. Severe: SI Severe: small stones' depth to roch Seve re 3 small stones, depth to rock Moderate: depth to rock Mode rate : s 1 ope, depth to roclt I Moderate: slope. Seve re: slope. lSevere: slope Severe: s Iope, depth to rocl Variable. Severe: s I ope, depth to rocl Severe: lght Aspen-Gypsum Area, Colorado TABIJ 11. --SANITARI FACII,ITIES (Sorne terma that describe restrictive soil features are defined ln the Glossary. See text for definltions of.sllght,. "good," and other terms. Absence of an entry indicates that the soll uas not rated. The lnfornatlon ln thls table lndlcates the domlnant soil condltlon but does not elimlnate the need for onslte lnvest198tlon) 201 Soll name and maP slrmbol septlc tank absorptl on ftelds Seuege lagoon area6 Trench sanltary I andfi I I Area sanitary landfi I I Daily cover for Iandfill Severe 3 percs slourly. Seve!e:percs slouly, s1ope. Severe: percs slotrly. Severe: perca elowly. Severe l percs slowly, slope. Severe 3 slope. Severe: slope Moderate: slope. Severe: eJope. Severe: slope. Severe: too clayey Severe: s I ope, too clayey. Severe: too clayey. Severe: too clayey. Severe 3 s 1 ope, too clayey. IS1ight----- lPoor:'' I too claYeY. ISevele: lPoor: s1ope.too clayey, slope. sl i ght-----Poor: too clayey. I Moderate:Poor: slope.too clayey. Severe:Poor: too cf,.ayey, slope. slope. 5---------- lModerates Alny I Percs slotrlY. Ot Ot. Ansel------ 10r, 11r.s AnvlL------ skyl tck---- sl igting--- Severe: slope. Severe: percs slowly, slope. Severe: slope Sever€: slope. Severe: percs slowly, slope. Severe: percs slowly, s I ope, large stones. Severe: depth to rock, c I ope, large stones. I Severe: I seepage. Severe: 6eePa9e, slope. Severe: slope. Severe: slope. Seve!e: slope. Severe: s1ope. Severe: s I ope, large stones Severe: depth to rock, sIope, large stones. slope. Severe: s I ope, too clayey, large stones. Severe ! depth to rock, s I ope, large stones. S€vere: slope Severe: slope. Severe: slope, Seve!e: depth to rock, sJope. lPoor: Iarge stones, slope. Poor: large atones, s lope . Poor: slope. Poor: too clayey. .large Ftones, slope. Poor: area reclalm, large stones, slope. lslight----- ls119bt---- lGood.lrt lSeverre:Poor: slope slope. Severe: slope,slope Severe: slope. oor see footnote at end of table. I Severe: I slope. I I I I severc: I slope. I I I Severe : I slope. I I I I severe: I slope. I I I Severe: 205 Aspen-GYPsum Area, Golorado TABLE 11..-SANITARY FACIL]TIES--CONIiNUEd SolJ name and nrap synbol Septic tank absorPt i on fields seuage lagoon are86 Trench sa ni t arY I andfi 1 I Area sanltary 1 andfi 1 I Dally cover for Iandfill I {5-----'--- | Moderate: Forsey I Percs sloulY' I large atone6. I 45, A?-'-" lSevere: Forsey I sloPe ' I I 48--------- lSevere: Fughes I Percs slow1Y' I 49--------- ls11ght---- Goclln I I SO--------- | Severe: Gos I 1n 52, 53----- cothic sIope. Sever€ percs slottlY- Sevele : percs slowlY, slope. Seve!e : percs sloulY, slope. Severe: slope, large stones I Severe: slope, larg€ Etones. Severe: slope Severe: aeePa9e. Severe: 6eePa9e, slope. Moderete: seePa9e, slope. Severe: slope S€vere: slope. Severe: lalge 6tones. Sevele: sIope, large stones I Severe: too clsYeY. Sl ight - ---- Sevc!e: slope S€vere: too clayey Severe: s I ope, too claYeY. Severe: slope I sl ight----- lPoor: I snrall EtoneE ' I I sevele: lPoor: slope. I srrall stone6, '' I sloPe' s1ight----- lPoor: I too clayey. I slight----- lFalr:I small atoneE. I Severe: lPoor 3 slope. I sloPe. I I s1ight----- lPoo!: I too claYeY, I hard to Pack. I Severe: slope. lPoor: too clayey, lrard to PacL, slope. I Sevete : I slope. I Poor: sma11 stones, 6loPe. 55r: I Gypeun land. I I Gypsiorthtd I Severe: I depth to rock, I sloPe. Moderate: percs slowlY, slope. Seve!e: slope. Sev€le: depth to rocl, slope. Sevele: depth to roc}, percs sloulY, slope. Sevete: percs slowlY, slope. Severe: depth to rock, sl I Severe: I slope. I I I S€vere: slope. I severe: depth to rock, s1ope. Seve re : depth to rock, slope. Severe: IpEon 5 8--------- - I r r atraddY 59,60,67,62'--'-- Iyers 63, 54 Jerry see footnote at end of tabl€' slope.slope Severe: deptti to roc)i. sl Moderate: slope, large Etones. I Severe: slope Severe: depth to rock, s lope . Severe: depth to rock, sIope, too claYeY. Severe: slope, too cIaYeY Seve!e: depth to rock, slope. Moderate: s)ope. I sevele sJope Sevete: depth to rock, sIope. Severe: depth to rock, sJope. Sev€re: Poor: area reclaim, s1 lPoor: smaII 6tones. Poo!: small stones, slope. I Poor : area reclaim, small stones, slope. oor: area reclaim, too clayey, hard to pacl. Poor: too clayey, hard to pack, small stones. P Aspen-Gypsum Area, Golorado 209 TABIf 11.--SANITART FACILIT]ES.-CONtiNUCd Soil narne and nap symbol Septic tank absorpt lon fields Sewage lagoon areas Trench sanitary l andfi l l Area sanitary landfill I I I I Dally cover for landfill 103r: Plnelli---- 104r: Tot!lorthent E------ Severe: percs slowlY, slope. Severe 3 depth to rock, slope. Severe: slope. Severe: <iepth to rock, slope. Severe: slope. Severe: depth to rock, slope. Severe: slope. Severe: sJope. Po or slope I Poor : depth to rock, small stones, slope. Brorrn6to--- | Severe: I slope. I I t0?r: [Js66g5----- Carnborthlds Rock outctoP. 105r: forrlorthent 6------ RocI outcroP. 106r:Trtdell---- Mergel ----- l08r: Uracca----- Mergel--'-- 109r, 110r: Uracca----- Mergel ----- Va r i able--- Severe: depth to rock, slope. Severc:poor filter, slope. Severe: poor fil.ter, large stones. Severe: large atones. Severe:poor f11ter, large stones. Severe: large stones. Severe: poor fllter, s I ope, large stones. Severe: s I ope, Iarge stones Variable--- Seve!e: depth to rock, slope. I I I I severe: I seepage, I sIope, I large stones. I Severe: I seepage, I slope, I large 6tones. Severe: seepa9e, la!ge stones. Severe large stones. Severe: seePa9€, s I ope, large stones. Severe: s I ope, large stones. Severe: seePa9e, slope, large stones. Severe: s 1 ope, 1ar9e stones Varlable--- Severe: depth to rock, slope. Severe: s I ope, large stones I Severe: slope Severe: seePa9e, large stones. Severe: large stones. Severe: seePa9e, large stones. Severe: large stones. Severe: seepe9e, slope, large stones. Severe: slope, large stones. Varlable--- Severe: slope I Severe: slope Severe: slope. I I Severe: seepa9e. s1 ight----- Variable. I Poor : I depth to rock, I small stones, I slope. Poor: slope Poo!: smaIl stones, sl ope . Poor: seePa9e, large stones Poor: Jarge stones Poor: seepa9e, large stones. Poor: large stones. Poor: seepa9e, large stones, slope, I Poor : llarge stone.c, I slope. I Severe: s eePa 9e I Moderat e: s Iope I Severe : seepa9e, slope. Severe; sec footnote at end of table s)ope. z'.|-1 Aspen-GYPsum Area' Colorado TABLE 12..-CONSTRUCTION MATER]ALS (some terns that describe restrlctive soir features are defined in the Glossary. see text for definltl6nE of .goodr" rfair,"-"ia-otrr., terms. 1i""r,". of an entry indicates that the soil nas not rated' The lnformatlon 1n this tabre 1ndrc"a."-ai.-aomlnant solr condttion but does not erlrrrnate the need for onslte lnvestlgatlon) Sand Gravel Topsoi I Soll name and naP sYmbol Roadf I 1 I 6--------------------- | Alny I I Good------- I ImPrdbable: I excess fines. I Foor: low strength, shr lnk- sue I I . Poor: lou Ettength, shrinh-suell. Poor: low strength. Poor: lon strength. Fair: slope. Falr: s I oPe, shrinl-swel I . Fair: shr I nk- stre 1l , fou 6trength, s1ope. Improbable: excess fines. , I Improbable: excess finec. Improbable: excess fines. Improbable: excess fines. I mprobable : exce6s fines. lmprobable,: excess flnes lmprobable: exces6 fines. I lmprobable: €xcess fines. Improbable: excess fines. Improbable: excess fines Improbable: exceas fines. Improbable: excess fines, Iarge stones. lrnprobable: excess fines I lmprobable: exceEa fines. lmprobable: excesB fines. Improbable: excess fines. I Inprobable: I excess flnes I Improbable:, excesB flnes. - lmprobable: exceE6 fines. Improbable: excess fines lrnprobable: excess fines lmprobable: excess fines lnprobable: excess fines lmprobabl e : excess fines. Inrprobable: e:.cesa fines, large stones. I lPoor:'I snall Etone6. I I I Poor : lsrnall stones, I slope. I lPoor:I small Etones. I I Poor: l snrall stones, I sloPe, lFalr:I too clayey, I srnall Btones I Poor : I slope area reclaim, srnal J stones, slope. large stones, slope. area reclaim, snalf etones, slope. area reclaim, smalf stones, slope. slope. I Poor : large stones, area r'eclaim, slope. lmy 8r: Anae I------ Anvl L I I I Poor: I large 6tone6, I slope. I I Poor : Ol. f, iI anvi 10t: Anvlk------ skyl lck---- slope Pool: slope. Fair: shrink-sue1l, loH strength, slope. Fair: slope. Poor: large stones. Poor I Poor : I Poor: I Poor : Poor: Sligtlng--- See footnote aL end of table' 216 Soil Survey TABLE 12.--CONSTRUCTION MATERIALS--Continued Soil name and map symbol Roadfi I I Sand Gravel Topsol I 44a . Brownsto--- For sey Falr: s lope . Fair: Large stones. Falr: large stones, slope. Poor: s1ope. Poor: .Iow strength. Good------- Fair: slope Poor: l.ow strength, shrlnk-sweII. Poor: Iow strength, shrink-swell. Poor: low strength, s 1ope, shrink-swel I . Improbable: excess fines. Improbable: excess fines Improbable:. excess fines. Improbable: excess fines. Improbable: excesB f1nes. Improbable: excess flnes. Irnprobable: excess fines Improbable: exceaa fines. Improbable: excess flnes. fmprobable: excess fines Improbable: excess flnes. Improbable: excess fines. I Improbable: I excess fines. I I oor: slope. 55r: I Gypaum land. I I I area reclaim, I slope. 56--------- lFair: Ipson I shrink-swell. I I See footnote at end of table Improbable: excess fines. Improbable: excess fines. Inrprobable: excess fines. Improbable: excess fines. Improbable: excesa flnea. Improbable: excess fines. Irnprobable: excess flnes. Inprobable: excess fines. Improbable: excess flnes. Improbable: excess fines. Improbable: excess flnes Improbable: excess flnes. I Improbable: I excess fines. I I I Poo!: small stones, area reclaim, siope. Poor: sma1l stones, area reclaim. Poor: smalI stones, area reclaim, s Iope . Poor: smaIl stones, area reclaim, slope. Poor: too clayey. Poor: smalL stones Poor: small stones, slope. I Poor : slnall stones. Poor: small stones, slope. Poor: small stones, slope. Poor: stnaLl. stones, area reclaim, slope. I I I I Poor : I area reclaim, I slope. Poor: small. stones, area reclalm. 221 Aspen'GYPsum Area, Colorado So11 name and nap sSrmbol TABI,E 12.--CONSTRUCTION I4ATERIALS--Continued Sand Grave l Topso I I Roadfl I I 105r: Torr iorthent s-------- Rock outcroP. 106r:rridell---- BrounBto--- 197r, 108r: Uracca----- 112-------- Woodha I l Pool: depth to rock, slope. Foor: sloPe. Poor: s lope . Poor: large stone6. Poor: Iarge stones. area reclain, large stones, slope. Poot: depth to rock, lou strength. Poor109r: Urecca----- Eollc I , one stoD€ st st 6t ecl I large I I IMereel----- l"i:l;. I I I 110r: I Uracca----- lPoor: I lar9e I sloPe, I I Mersel----- l';:;;. I slope I I 111-------- lPoor: vandamore I area'. I sloPe I s s n one ai I Poor See footnote at end of table' excess fines. Irnprobable: excess fines. lmprobable: excess flnes I Improbable: excess fines. Improbable: large stones Improbable: excess f1nes, large stonec. lmprobable: large stones. Improbable: €xce6E fines, large 6tone6. lnprobable: large stones - l rnprobabl e : exce6s fines, large stones. Inprobable: excess fines. Irnprobable: excess fines, Jarge stones. lmprobable: excess fines. Improbable: excess fines lmprobable: excess fines Inprobable: excesE fines. Improbable: large stones. Irnprobable: exceas flnes, large ston'e;. Improbable: larg€ 6tones. Irnprobable: excesE flnes, large stones. Improbable: large stones. Irnprobable: excess flnes, Iarge stones. Irnprobable: excess fines lrnprobable: excess fines, large stones. I Inprobable: Pool: depth to rock, sneIl stone6, slope. I I I I Poor : smalf stones, slope. lPoor: I smal1 atones, I area reclaln, I sloPe. Poot 3 farge stones, area reclaim. I Poor : I large stones, I area reclaln- I I l?oor: farge stones, area leclaln, slope. lPoor:large stone6, area reclalm, e1ope. Poor: large stones, area teclaim, sloPe. Poor: large stones, area reclairr, slope. I Poor : sma1l stones, slope. I Poot : large stones, slope ' Poor: small stones, slope. Aspen-Gypsum Area, Colorado 223 TABLE 13.--IiATER MANAGEMENT (Some termE that describe reattictive soil features are defined in the Glossary. See text for definitjon! o{ "sllghtrilmodelate," and'sevete.' Absence of an ently lndicates that the soil was not evaJuated. The lnfornatlon in thls table lndlcates the domlnant soil conditlon but does not ellminate the need for onsite lnvest lgat i on) ],tat ons or--Feature6 affect n9-- Soll nane and map symbol Pond re servoil arees I Eribankments, I dikes, and I ]evees Dr a i nage I rr igat i on I Terraces I and I diverslons Gra s sed uateruays I I 1---------- lModerate: Acree I sloPe' I I 2---------- | Sevele: Acree I sloPe' I I 3---------- lModerate: Actee I sloPe. Ill,5------- lsevere: Aclee I sloPe' slight--------- sl 1ght --------- Moderate: plping. I Moderate : I ptping. Soll bloulng, percs slowly. Slope, sol1 blouing, percs slouly. Fercs slorly--- S I ope, percs slowly Percs s1ouIy. Slope, percs slouly. Percs slowly. Slope, percs slowly. Deep to seter DeeP to water Deep to water DeeP to water Soil blowing, percs slouly, slope. Soll blowing, percs slowly, slope. Percs sJouly, s1ope. Percs slowly, slope. 6---------- | severe: Alny I seePage I Severe: I plplng. Severe: piptng lHoderate: piping, large stones. I Moderate : piplng, large stones. Moderate: piping, large stones Severe: PrPrn9 Seve re : large stones. Severe: large stones. Severe: DeeP to $ater lSloPe, I excess salt. Deep to uater Slope, excess salt. lDeep to uater lErodec easlly lToo s!1d, I I elodes easlly. o, ot. Ansel------ 10r, 11r: Anvlk------ skyl lck---- sligt in9--- Severe: seePa9e, s1ope. Sevete: sl ope . Severe: slope. Sevete: s1ope. Severe: sl ope. Scwe re : slope Severe: slope. Severe: depth to rock, sJope. Deep to uater Deep to rdater Deep to uater Deep to wate! Deep to Hater Slope, erodes easiJy Slope---------- Slope---------- Slope---------- Large stones, droughly, percs slowly. Large stones, droughty, <iepth to rock Depth. to rocl, slope. S I ope, erodes easlly S 1 ope, Iarge stones, erodes easily Slope, large stones. S I ope, large stones Sl ope-:-------- S I ope, Large stones, percs slowly. Slope, large stones, depth to rock. Slbpe, large stones, depth to lock. lToo arid, slope, erodes easily Large stones, s 1 ope, erodes easlly. Large stones, slope. Large stones, slope. Large stones, slope, Crought y . Lalge stones, slope, droughty. I Large stones, sl ope Rock outclop. see footnote at end of table prpr n9 . Deep to vrater slope.Ansari----- Soil Survey 226 TABLE 13.--wATER I{ANAGEMENT--Contlnued Features a ctLimltatons for-- SolI nane and map sYmbol 46,41----- ForseY Pond reservoir areas Enba nkment s, dlkes, and levees Severe: seePage, large stones. Severe: seePa9e, large stones. s1ight--------- Severe: plping. I Severe: piplng. Moderate: hard. to Pack- Moderate 3 hard to Pack. sItght--------- Dralnage I rr Igat i on Deep to uaLer Large stones, droughty, slope. Deep to Hater lLarge stones, drought y, s1ope. Deep to eater I Slope, I percs slowlY I lSo1l blowln9,Deep to uater slope lDeep to xater Soll blowing, sIope. Deep to water Percs slowlY, slope. Deep to water Percs slowlY, slope. DeeP to h,ater Droughty, s1ope. Large stones---Large stoires, d!oughty. I Slope,Large stones, s I ope, drought y . large stones. Percs slourly---lPercs slowlY. So11 blouing---Favorable. Slope, soll blovring Percs slowIY---Percs sloulY. Terraces and divers ions c!assed waterwaYs S I ope, percs sloulY. Slope, droughty. 4 Goslln Ea (2------------ Gothlc Moderate: seepa9e, slope. Severe: s1ope. Moderate: s1ope. Severe: seepage. Sev€re: seePa9e, s1ope. Moderate: slope. Severe: s1ope. Severe: s1ope. sl ope I S1ope, I percs slonlY. I I Slope---------- 55r: I Gypsum land. I I Gyp6lorthid lSevere: I dePth I sIoPe. 56, 5?----- Ipson 58--------- I rrauraddy 59,60,61, Iyers 63.64----- Jerry 65r: Jetry------ I I I I Severe: to rock, I seePage, l PiPtng. I Moderate : large stones. Severe: seePa9e. I severe: hard to Pack. Severe:thln Iayer. Severe: lltltl Deep to rdater lDePth to rock, I I slope, I I erodes easlIY. I Deep to Hater Slope---------- Deep to htater Droughty, depth to rock, slope. lDeep to uater Percs slow1Y, depth to rock lDeep to lrater lPercs slowlY, slope lDeep to water Percs slowlY, sIope. Large stones--- S I ope, depth to rock, erodes easlIY. S 1 ope, Iarge stones. S I ope, large 6tone3, deplh to rock. S I ope, depth to rock, percs slowlY. Sl ope, large stones. S1ope, excess saIt, erodes easl I Too arid, large stones, slope. Large stonea, .s1ope, droughty. Slope, depth to rocl percs slowlY. Large stones, s1ope, percs slowlY Large stones, percs slorrlY 62 Severe: s1ope. Severe ! s1ope. Sever€: slope. Sevele: slope Moderate ! seePa9e, slope. thin laYer Severe:Millerlake-Moderate: 5eepa9e, s1ope. See footnote at end of table' thin laYer. Deep to water lSloPe----------Favorable------ | Favorable . Aspen-Gypsum Area, Colorado 229 TABLE 13. --}iATER I,IANAGEMENT-.CONtiNUCd Llml tations for--!ea tures a It ect 1n9-- Soll name and nrap slzmbol Pond reservoit areas Errba nkment s, diles, and levees Drainage Irrigat ion SerraceE and di vers I ons Gras sed uate!trays 102r, l03r: Tanna------ Plnel11---- 10{, : Torrlorthent E---- Carrbortbids Rock outcrop. 105r:forrlorthent s---- Sever€: slope. Severe: slope. Severe: depth to rock, sIoPe. Vari able------- Sevete: deptb to rocl, slope. Severe: thin layer I Severe: piping. Severe: piping. Variable------- lDe€p to Hater Deep to Hater Deep to uater Var i able------- Deep to uatelSevete ipP Slope, pelcs slovrlY, depth to rocl ' Slope-----:---- S I ope, droughty, depth to rock. S I ope, depth to rock, erodes easily. Slope, erodes easily. Slope, large stones, depth to iock. Too arid, s]ope, eroilee easily. lToo arid, slope, erodes easily. foo arld, farge Etones, slope. Variable Too arid, large stones, slope. Va ri able-- -- -- -Varlabfe----'-- Slope. lSloPe, droughty, I large 6tone6, depth to rock. I dePth to roc}. Rock outcrop. 106r:Trldell----S€vete 3 seePa9e, slope. Btownrto--- | Sevele: I seePage, I sloPe. 10?r:uracca;----Severe: seepa9e. Mergel-----Moderate: seePa9e, s1ope. 109r, 109i, 110r: Uracca-----Severe: EeePa9e, slope. Mergel'----Severe: slope. tltltl lsevcre: lDeeP to Hater I large 6tonea. Itl lsevere: lDeeP to htater I seepage, I I large Btone6. I Severe: aeepa9e, large stones. Dcep to uate! Severe: piplng, large stones Deep to $ater Severe: aeePa9e, large stones Deep to Hater Severe: plping, Iarge stones. Deep to wate! Severe: 6eePa9e, slope. Severe: seepa9e. Severe: piping, large etones. Deep to l,ater lDroughtY,111-------- vandattrore 1 12-------- Iioodha I I 1 I 3-------- lloosley Sevete: slope. Sevet€: slope. Deep to Dater Deep to Bater see footnote at end of table Severe: sl ope . Large stoneE, d!oughty, slope: S1 ope, large stones. S I ope, Iarge 6tone6. Too arld, large stones, slope. lSlope, lloo arid, I large Gtones. I large Etones, I I slope. Large stones, droughty, slope. Large stones, droughty, slope. Large stones, droughty, slope. Large 6tones, drought y, slope. depth to rock, s1ope. lLarge atones, I depth tc rock, I slope. I lDepth to rocl, I slope. I Large stones--- lLarge atone6'-- S I ope, large stones. S I ope, large stones. S I ope, large stones, depth to rock Sl ope, large stones, depth to rocl. Large stones, droughty. Large stones, droughty. Large stones, s I ope, droughty. Large stones, slope. droughty. Large stones, sl ope, droughty. Large stonea, sl ope, depth to roc Slope, lSlope, depth to rock. I depth to rock. Aspen-GYPsum Area, Colorado TABIJ 14.--ENGINEERING INDEX PROPERTIES (Ihe slzmbol < means less thani > mean6 more than' Absence of an entry lndicates that data trere not estlmated) asslflcation Frag- I ment s >3 Fetcentage Passlng sieve nunbet-- 231 Liguid I Plas- llmtt I ticitY I lndex c Soil narre and map clmbo1 Depth USDA textule Unl iedf AAS H30 Ili tlI 10 I 40nches4 200 1n Acree Acree I O-5 lvery stonY sandY I loam' 5-lOlLoan, claY loam iro-golcray, claY loan I 0-10 lLoam-- 1o-2? lclaY, clay loam, gravellY claY I oan. CIeY 1oam. claY, gravellY claY 1oan. 27-60 lsl{, sP-S}rt IGP.G1II, GM ICL-ML, CL ICL, CH ML, CL-llLct, cH I lA-2, A-1 I lA-6, A-4 lA- ? A-4 A-? A-6, A-? lA-4 I A-? I IlA-6, A-? I I CL 0-10 I Loam------------- lML, 1O-2?lclay, clay loam, | gravellY claY I loam. 2?-60lclaY loam, clay, | 9ravellY claY CL-ML CHCL, CL Pct I 0-4 0 0- 15-?0 tl tl I 15-10 I 10-50 tl I 90-100 | ?0-95 | ?5-100 | ?0-95- ll I 90-100 I 85-100 | 70-100 I 60-95 lltl ?5-1001?0-100160-80 ll ll ll I 90-100 | ?5-1OO I ?o-1oo I 6o-95 llltll | 75-100 I ?0-100 | 50-80 lll 55-?5 I 90-100 I 85-100 I 60-80 5-30 Pct 20-30 25-35 40-50 NP-5 0-5 0-5 B 15 0-15 90-100 ?5- I 00 90-100 75- 1 00 60-80 65- 95 5- 15 2 0-35 60-80 55- 90 55- 90 55-?s 20-30 40-50 NP-10 2 0-35 1 0-25 NP.1 O 20-35 1 0-25 4530- 0 0- 15 20-30 40-60 30-45150- I loan. 0-8 lLoan------------- lcL 8-25lClaY loam, candY lCL, lA-6 cL-!'o., lA-6, A-47------------- Afmy 30-35 25-400 0 | 8O-100 | ?5-1oo | 5 5-80 I 50-65 I 50-?0 I I 40-55 I 10-15 5- 15I I I l2 I I clay foarn, Ioan- | gr, 9r : Anael ----------- Anvlk----------- 10r, l1r: Anvlh----------- 6-50 I Fine eandY loam, lsM-sc, sM, I loan.I CL-ML, ML 1l O-23 lLoarll-- lcL-!!L 23-48lstonY claY loarr, lCL, SC I ctony aandy clayl I loam. I 48-60 lclaY loan-------- ICLgl 0-12 lLoan-- lcL-l4L 12-18 Sandy loan, loam CL-HL, Clay loam, cobblY loam, cobblY clay loam. Loan, cobblY claY loam, sandY claY I oam. sc A-4 I I A-4 IA-6 A-6 sH- ML, CL CL, cL-!,1L CL-ML, su-sc, 1.1L, SM CL A-4 A-4, A-2 A-4, A-2 sc SM Il1 I I l4 I I I I I 42 50 A- A- 6 6 A-40-12 I Loam-- 12-18 lSandy loam, loant t8-42 Clay loam, cobblY Joam, cobbJY clay 1oan. Loarn, cobblY claylcL, sC A- A- 6 542-60 loam, eandY claYl loam. I I See footnote at end of table' 5-30 q-100 o(0-?0 30-40 10-20 I 80-100 t 75-'100 I ss-80 tl''t 180-100175-1ool55-80tll 300-2 3530- 4030- 10NP- 0-5 5-35 0-5 tl | 100 I 90-100 I 100 I 90-100 lltlI 100 I 90-100 tl I 90-100 I 85-100 I 90-100 I 85-95 tlll I 90-100 | 75-95 I I ?5-100 I ?5-95 I I I I 90-100 I 85-100 90-100 I 85-95 65- 85 5s-85 50- ?5 35-70 50-?0 30- 60 50-7 0 30-60 25-30 30-35 2s-30 20-30 5- 10 10-15 10- 15 5- 10 NP-1 O 10-20 10-20 5-10 NP-10 10-20 0 0 ?5- 95 65-?5 8565- 90?0- 55- 85 55-?5 55- ?5 ?00- R(-'7q 4 30 30 (- t 4 0 0 I I I I | 75-95 | 65-?s I I | ?0-90 I I | 55- 85 I I I aq-o( ?5- 00I90 1 30-40 25-30 20-30 4030-5-30 Aspen-Gypsum Area, Colorado 237 TABLE 14.--ENGINEERING INDEX PROPERTIES--ConIinued Soll nane and map symbol Depth USDA texture class tt 1 cat ion AASHTO I Frag- I ments l>3 I inches I10 I 40 I I 200 Percentage Pa6Elng sieve nurnber--I Liguid I irnl t 4 Uni fled Plas- ticlty index {9,50----- Gosl 1n 51, 52, 53------- Gothi c ln 50-60 0-5 stony loam- 6-50lclay, clay loan, silty clay loam. Clay Ioam, silty clay loam. Fine sandy loam Fine sandy loam, gravelly fine sandy loam. A-? sM-sc, sM, lA-2, A-4 GM-GC, GMI cL-rl],cL, cH, GC GC A-6, A-? ll lML, CL-ML, lA-4 I sM, sM-sc I lcl.-ril]., ct, lA-4, A-6 I sc, sM-scltl IGM-GC, GC I lltltlll MLcL- CL CL A-4 A-5 A-6 0-5 5- 50 sM-sc, sM CL A-2, A-4 0- 12 72-34 Loam------- CIay, clay loam, gravelly clay I oam. 34-60 lClay Ioam,gravelly clay I oam. 0-4 4-'l Gravelly loam---- Gravelly clay loarn, channery I oarn. Very channery loam, very channery clay loam, very gravelly loam. A-4 A-? 1 60 A-4, A-6, A-2 ctP q-rq 0-5 0 0 0 0 0-5 0-5 0- 10 0 0-5 I I I 95-100 ?5-100 55-100 90-100 50-100 0050-1 55-80 55-80 t(?(- I 90-100 I ?0-90 I 95-1oo I 9o-100 | ?5-95lt 95-100190-1001?5-90 I I ?5-100 150-?0 50-100 t50-?0 I I I 85-100 I 70-85 50-100 I 45-95 50- 50- 50- I 00 ?5 ?5 45- 45- oq 65 65 450-5 45- 25-0 I I I 50-80 | ?0- 90 I I 65-80 I I 120-{0 t20-40 50- 65 {0- 90 0-80 q-RR 4 0- 0-4 3 4 2 60 0 Pct 25-3 0 35-50 30-40 l5-2s 15-25 20-25 {0-55 35-50 15-25 20-30 20-30 NP.lO NP-10 5- 10 15-30 1 0-20 5-10 25-35 (-1q 5-11 25 10NP- (qr. Gypsura land. Gyps I orthids----0-8 ?o 8 -23 ,?-?o Fine sandy loam Fine sandy Ioam, I oam. Fine sandy Ioam, I oam. Ileathered bedrock Ir{L, SH, CL-ML, sM-sc ML, SM, CL.ML, sM-scitl,, sM A-4, A-2 A-4, A-2 A-4, A-2 0-5 0-5 0-5 001 100 100 90 80 0- 0- 0- 5 E 5 90- i 00 90-1 00 90-1 00 65 60 60 25- 2S- x5- 20-35 20-35 20-35 10NP- NP-10 NP.1 O Ipson I rrauaddY 0-14 lcobbly loan------ ICL-I{L I 4-2 5 | very gravel ly I GC sandy clay loan, I very gravelly I cl ay l oarn. I Very gravelly I sandy clay loah, Igravelly sandy I cJay loam. I I v€ry stony loam I A-4 A-6, A-2 A-6, A-2 sM-sc, sM, lA-4 I ML, CL-MLI IGH, GM-GC IA-1, A-2, A-4 25-60 5-14 scGC 0-5 1 an4- 34 very chennery I oarn. Very channery I oam. Unueathered bedrock. See footnote at €nd of table. GM, GH-GC A-1, A-2 0-40-5-50 20 -4 15-35 20 NP-I T 15-30 15-30 10-15 20-50 R 0- 10 55- 65 ?50- 100 q q- 0- 8 50 60 I 80-9s | ?s-90 I ss-?o 50-50 30-50 0-53 045-?0 8S- I 00 q 80 q 60- 30-500-54 50- 65 25-45 00-42 65 20- 40 45- 25-30 30-35 30-35 20-30 -30 5-10 10-15 10- 15 20-30 I NP-10 10NP- Soil Survey 242 TABLE 14.--ENGINEERING INDEX PROPERTIES--Continued c assl Soil nane and map sYmbol Depth USDA texture Uni fied cat on I Frag- I ments >3AASHTO nches Percentage. Palt ng sieve number-- I I Ligutd I lin1t I41040200 PIas- tlclty index 104i: Torr 1 orthent s--- Camborth I d s - - - - - Rock outcroP. 105r: Torr 1 orthent s--- I 0-4 4-30 Va r 1 able--- Pine sandy loam, loan, clay loam- Unweathered bedrock. va r i able--- Loanr, claY loam ML, SM, cL, sc sM, CL, CL-ML, sM-sc CL, !ill,, SM, cL, sc ISM, CL, CL-ML, sM-sc 30 0-4 4-30 CL-ML ML, 3O lUnueatbered bedrock. 0-4 Varlab 4-30.lFine sandY loam, 30 1oam, clay loan. Unweatherbd bedrock. Pct 0-20 0-20 05-4 0-5 0-20 0-20 A-4 A-4, IA- A-2 A.5 A-4, A-6 A-2, A-4 4A-A-2 A-6 I I 55-90 | 50-85 I 65-95 | 60-90 I Il--- I I t--- I ?5-100 It--- I I I I I 100 85 90 0-65-90 I 6 I 65-95 I 5 I I I I 0 I I I 25-60 I I 25-?0 I It--- I It--- I 50-80 I I I I I I I 2s-60 I I 25-?0 I It--- I 75 50-80 ?5 50-80 35- 55-90 35- Pct 20-35 15-35 25-40 20-35 1 5-35 NP- NP 15 -20 5-20 NP-15 NP-20 Rock outcroP- 106r:Trldell--------- Br oun st o-- - -- - - - see footnote a t end of table. 0-2 stony sandy Ioam Very cobblY fine sandy loam, ext remelY gravellY sandY loam, verY stonY fine sandY loam- Very graveIlY sand, extremelY gravelly sand, extremelY cobblY sand. Stony sandY loan Very gravellY sandy loam, verY cobbly sandY I oam. loamy sand, gravellY sandy loam, very gravelly sandy I oan. CL-ML, sM-sc GH, GM.GC sM-sc GM, SM, GP.GM, SP-SM 2-31 3?- 60 11 11-30 0- GP GM-GC GM 30-60 lVerY gravellY I I I 120 -4 30 35-50 5 0-45 15-35 20 0t3 I I I I I l3 0-1 A-2 A-2 A-4, A-2 4 1 e- A- 1A- 1A. A- 90 50 I I I I ?0- I 140- 40 65 -B< -60 30-, 55- 45 4 5 ?5-95 45-55 35-45 ?0 50-60 50-65 50- 50 30 30- 15- 45 -23 20 0-5 25- 15 10- 50-80 40 30 45-55 5 35 30- 0- -? (- 2 2S 2 20-30 15-30 25- 30 NP '10 NP 5-10 5- 10 NP NP1 246 Soi! Survey TABLE 15.--PHYSICAL AND CHEMICAL PROPERTIES OP THE SOILS (The symbol < means less thani > means more than. Entries under 'Eroslon factors--T' apply to the entire profile. Entries under "tfind erodibility groupn and "Organic mattern apply only to the surface layer. Absence of an entry lndicates that data were not available or were not estimated) tll lDepth lClaY I tlltll lt I Salinity I Shrlnk- Erosion I vri ndl So11 nanre and map symbol Moist bulk Permea- lAvailable I soil bllity I Hater lreactlon lcapaclty I factors I erodi- I Organic I lbi f.ity I tnatter X lTlgroupltyInsde I swell I potentlal IN n/hrt-tr- 0-5 | 8-17t1.40-1.s01 2.0-6.0 5-1ot2o-35 11.35-1.401 0.2-0.5 10-50 I 35-45 I 1.35-1.45 I 0.06-0.2 ttt 0-10 I 15-2? t1.35-1.{0 I 0.6-2.0 L0-21 | 35-50 I 1.35-1.45 I 0.05-0.2 21 -50 .,30-45 I 1.35-1. 45 | 0.06-0.2 lll o-10 I 15-2? 11.35-1.{o I 0.6-2.0 1o-2? | 35-50 I 1.35-1.45 I o.o6-0.2 21-60 I 30-45 I 1 .35-1.45 I 0.06-0.2 lPctl glcc I I In/ 1n IPH nmn os cml 1, 2---- Acree r-l 10.10-0.14 16.6-?.3 t0.13.r0.1616.5-?.3 t0.13-0.16 l?.9-8.4tl 10.1?-0.2116.6-?.8 10.13-0.1616.5-7.8 t0.13-0.161?.9-8.4tl 10.1?-0.2116.5-?.8 I 0.13-0.16 15.6-? .8 I 0.13-0.1 5 | 7.9-8 .4 -ttt <2 I Lor'------- I 0.32 I<2 lModerate 10.281<2 lHish------10.281ttt<2 lLow-------10.281<2 lHish------ 10.28 I<2 lHoderate 10.281ttt<2 lLow------- I 0.28 |<2 lHish------ I 0.28 I<2 lModerate I 0.28 I 5 E 5 5 5 Pct 4-8 2-4 2-4 6, 1------- I 0-8 I 20-2511.15-1.25 I 0.6-2.0 AImy I 8'26120-3511.25-1.401 0.6-2-0 1|26-601 10-20 11.35-1.50 | 2.0-5.0 10.1?-0.1917.4-8.4 I 10.19-0.2117.4-9.0 I I 0.13-0.15 I >7.9 I I Lotu------- I 0 .32 IlModerate I 0.3? | I Low------- I 0 .3? | 4 5 II gr, 9r: Anse I -----'----- Anv i k -'--- -- - -- - 10i, 11r: Anvlk - --- - - -- -- - skyl i ck--------- sl i9t 1n9-------- 12*: Arle------------ Ansa r1---------- Rock outcroP. 12t. Atcncl o--- ------ tt 0-12115-2511.25-1.30 12-18 I 10-25 I 1.40-1.50 18-42 I 20-35 I 1.25-1.40 42-60 I 20-35 I 1.2s-1.40 tttt 0-12115-25t1.25-1.30 12-18 I 10-25 I 1.40-1.50 18-42 I 20-35 I 1.25-1.40 42-60 I 20-35 I 1.25-1.{0tt 0-31110-2511.25-1.35 31-48 120-35 I 1.20-1.30 48-60 I 20-35 I 1.25-1.35 tl o-24120-21t1.35-1.{o 24-60 [35-45 I 1.15-1.20 ttrt 0-10115-2511.35-1.45 1o-30 | 1o-25 I 1.40-1.50 30 t---ltt 0-8 118-2511.35-1.45 8-14 116-2011.35-1.45 I 0.14-0.16 I 6.1-?.3 0.12-0.1 6 | 6.1-?.3 0.1?-0.2016.1-7.3 I 0.15-0.1816.1-7.3 0.1{-0.1?16.1-?.3 0.18-0.2016.1-?.3 0.12-0.15 I 6.1-? .8 I I 0.16-0.1816.1-?.3 tt I Low------- ; lModerate I lModerate Ilt lLorr-------; lLow-------; lModerate I lModerate Itttt lLon------- I Lor------- I Moderate I Low------- I Lou------- I 'ttt o-23 I 15-25+1.35-1.451 0.6-2.0 23-48 128-35 11.40-1.s01 0.2-0.5 48-60 128-35 11.40-1.45 I 0.2-0.6 2 <8 <2 <2 <2 <2 <2 <2 <2 <2 <2 0.3? o.24 0 .3? I4ts I I Ists I I I I I5t5 I I I Ists I I I3t8 I I I218 I I I114 I I I I I I313 I I I I 2 .0-6.0 0.6-2.0 0.6-2.0 0.5-2.0 2.0-6.0 0.6-2.0 0.6-2.0 0. 6-2 .0 2.0 0.5 0.6 I 0.28 0.28 0.28 0.28 280 0.1 4-0.17 0.18-0.20 0.12-0.15 0.09-0 0 .0?-0 0.07-0.091?.4-8.4 0.06-0.091?.9-8.4 <2 lLow------- | 0.28 <2 I Moderate I Moderate I I Low------- I Moderate I Moderate I I Low------- lModerate I I I Low------- I Low------- l---------- I I Low------- I Low------- <2 <2 <2 <2 0.10 6.1-? .3 6. 1-? .3 6.1-7.8 2 0.28 0.28 0.1? 0 .32 0 .28 0 0 0 6- 2- 2- 0.14-0 0.1?-0 0.10-0 6.1-? .3 6.1-? .3 6.1-? .3 ? .9-8 .4 ?.9-8 .4 16 20 L2 L2 11 2 0 .6-2 . 0.06-0.I 2 ?.3 6.5 6- 6- 6 5 0.10 10 0 0 6-2 2_1 0 0 0.6-2.0 0. 6-2 .0 0.12-0.14 0.08-0.12 0.10 I----t Io.2l I0.ls I ----l I I I I 0.1? I 0.20 I 0.15 I 0.101 I 14 0- 10 10-20t1.45-1.551 t0-24 tl8-35 I 1. 40-1.50 I 24-30 I 15-25 I 1 .40-1 .55 I 30-601 0-2 11.60-1.?01 lll 0.12-0.14 0.11-0.13 0.o?-0.09 | ?.9-8 .4 0.03-0.05 | 7 .9-8.4 I 1 .4-1 .8 7 .4-'t .8 <2 <2 <2 <2 see footnote at end of table- 2.0-5.0 0.6-2.0 2.0-6.0 6.0-20 2-4 1-3 <1 2-4 2-4 2-5 4-6 2-4 2-4 249 Aspen'GYPsum Area' Colorado CA], ATID CHEM]CAL PROPERTIES OF THE SO]LS--CONtINUEd So11 name and nrap synrbol TABLE 15.--PHYSI oepth lClaY I l'loiat lAvallable I soll lsalinitY uater I reactlon EroG on Shrlnk- | factorc suell I I ntlallX l1 Permea- bt 1 lty erodi- bl 1 ltY 9roup org.nlc matter I bulk I densltY ca lty I I n 10.11-0.151?- 10.11-0.151?. I 0.13-0.15 I 5.6- 0.16-0.1816-6- 0.1?-0.1916.5- I 9-9.0 9-9.0 0.14-0.18 | 6 - 6-? ' 8 0.14-0.1616.6-7.8 0.14-0.161 6.5-8.4 I 0.12-0.15 | ?.4-8 -4 0.12-0.151?.4-8.4 o.o9-0.131?.9-8.4 lnl PHInlPct l-l o-1Ol1s-2511 gl cc .2s-1.35 o.1O-0.1316.6-?'8 o.o?-o.12I6.6-?'8 o.o6-0.1ol?.9-8'4{5,46,4?"---'- ForEeY | 10-22 I 20- I 22-60 I 10- 3511.25-1-3s 25 I 1.3s-1 .45 0.6-2 .0 0.5-2.0 0 .6-2 .0 ll0-6 120-21 I 1.25-1 '35 6-50 1 35-50 1 1.20-1 '30 so-go tz'l-lo I1.25-1 '35 0 .6-2 .0 .06-0.2 0 .2-0.5l0 ?.8 ?.8 ?.8 0 5 8-18 I 1.25-1 .35 8-1811.35-1-45 20-2'1 11.35-1.45 35-5011.40-1.s0 35-4011.40-1-50 1s-25 11.35-1.4s 2.0-6.0 2.0-5.0 0 .5-2 .0 0.06-0.2 0.05-0.2 0.6-2.0 0.6-2.0 5- 60Gosl ln 51, 52, 53------- Gothl c | 34- 60 5 {-----------.r--- I 0-4 lpote cml tl 1ll. <2 i:,o,-------lo'1?l 5 <2 |Lorr-------I0'10I<2 lLou-------10'101 <2 <2 <2 <4 <4 <2 <2 <2 <2 <2 gl l!ou-------10'1? IHlqh------ I0'32 lModerate 10.32 1l lLovr-------10.32 l:,ow-------|0'32 1l I Low------- | 0.211 I Hleh------ | 0 ' 10 lHigh------ l0'10 1l I Low------- | 0.1 0 Low------- 10.10 Lotr------- 10.10 I l5 I I Its R C I 8 3 5 6 Pct 2-4 2-4 <2 2-q 1-? Grotte 55r: GyPsun land' GlPs I orthlds---- 25-35 I 1.30-1 -40 25-3s11.30-1.40l4-?lI ?-60 I 0.2-0.6 tlllll 0-8 l1o-2011.3s-1'50 8-23110-2011-40-1'50 23-39 I 1o-20 I 1.40-1's0 .0 .0 .0 0.6-2 0.6-2 ''!:1 I I I 0.14-0.181?.4-8.4 0.14-0.181?.4-8.4 0.14-0.181?.4-8'4 I ---I <2 I I I I Lou------' I LoY------- I Lou------- | --;------- 0 0 : 31 3? 31 22-8 4-8 4-8 4L <1 39 l---lu';.ll ill.iii 20-25 I 1.25-1.30 2?-35 I I .25-1.35 25-3011.30-1-40 0 .6-2 . 0.6-2. 0.6-2. 0.6-2 .0 0.6-2 .0 o '!:'-'' 0.6-2 .0 0.05-0.2 II 0.2-0.6 I o .06-0 .2 t--- I| 0.6-2 .0 | 0.6-2.0 I | 0.6-2.0 0 l00 l00 t0 0.6-2 .0 0.6-2.0 0 .6-2 .0 -13-o.15|6.6-?'8 .09-0.111?.4-?'8 .08-0.101?.9-8.4 I o.1O-0.13 l? .4-8 .4 o. o9-0.10 l? .4-8 .4 o.o8-o.1Ol?.4-8-{ I ---I I 0.14-0.181?.4-8.4 t0.14-0.161?.4-8'4 5 8-- - ------ I rrauaddY 59, 60----- IYers 67, 62----' IYers 63,54----- JerrY 65rr 66r.5?r: JerrY---------- tlo-s 112-2511.25-1.35 s-14112-2511.30-1-40 4-34112-2511.30-1'4034 l---ltl o-3 l2o-2?11.40-1-45 3-3?135-5511.35-1.45 3? l---ltlo-6 128-3511-30-1'40 6-33135-5511.35-1'45 33 l---l I I I l1 l--- I 0.12-0.161?.4-8.4 10.14-0.161?.4- ll o-11115-3511.35-1'4s 11-34 120-40 I 1.40-1.50 ic-so t t5-2211 .40-1 '50 ttlrll -i o-rr 115-35 11.3s-1.45 i rr-sa I 2o-40 I I .40-1 'so i rr-e o 0s-2211 .4 o-1 ' so lll-- Millerlake------ 1,3:i? lli:31 li :ii:i :3i I 44-60 I 18-2? I 1 '25-1 '35rll^-..r--------__----- I o-15 t18-2? r1.?l-i.19';";;- irs-so|1s-2s|1'3o-1'4ottl See footnote at end of table' | 0.6-2.0 I I 0.2-0.6 I 0.6-2.0 | 0.6-2.0 | 0.6-2.0 I I 0.15-0.18 16.6-l '8 0.13-0.1516.5-8'4 o .1 O-0.12 | ? .4-8 .4 I I 0.16-0.1815.6-?'8 io.rs-o.rsl5.5-8.4 o .1 O-0.12 17 -4-8 -4 I 0.16-0.1816.6-?'8 0.19-0.21 | 6.6-? '8 o.1O-0.121?.9-8.4 I 0.15-0.1S15.1-?.3 0.13-0.1515.5-8'4 I <2 <2 <2 <2 <2 _:'- <2 <2 Lou--I---- I 0.. 1o I 5 Mod€rate | 0.10 I iModerate 10.101 rll I Low------- | 0.10 I I Low'------ I 0.1? I I Low------- I 0 .15 I t----------l----l ltl i r,ow------- I 0.32 lHlgh------10.32s----------l----rl I Moderate I 0.28 IHigh------I0'321----------l----l lro,-------lo.rnl u lModerate | 0.24 I ILotr-------|0'1?I lll l"o*-------lo-rnl' lModerate | 0.24 I lLow------- l0'1? I lro,-------lo.rnl u I lloderate | 0 .32 I ILow-------I0'10I lro,-------lo-,'l u ILou-------I0'24I 1ll 8.4 <2 -:1 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 a I I C 4 5 6 ( ( t 2 2 1-3 2-5 <1 <1 a-q 3-5 2-3 2-5 I 0-121 | 12-34 I I I I I I I I Aspen-Gypsum Area, Colorado 251 TABLE 15.--PHYSICAL AND CHEMICAL PRoPERTIES OF THE solls--continued Soll nane and nrap symbol Depth lClay I I Moist bull density Permea- bl11ty I I I I I lAvailable uater capaci ty ISoil I Sal r€actlon I I I ty I Shrink- I swe11 I potent I al lni Eros I on factors x T Wind erodi - btllty 9roup Organic matter 94r, 95r : Shova I ter------- Horva J'------- -- 96, 91, 98, 9 Southace 100r:starl ey--------- St a rhan--------- 101r. 102r, 103r: Tanna -- --- ------ Pinelll--------- 104r: Torrl orthents--- Camborthi ds- ---- Rock outctoP. 105r: Torrl orthentc--- o-- In I Pct t-0-6 I 5-1s 6-1? I 5-181? I --- I I0-8 120-2s 8-39 I 35-45 39-60 I 20-30 1.30-1.40 1.40-1.50 9/ cc 1.30-1.35 1 .15-1 .20 I .25-1 .30 1 .25-1 .35 1 .45-1 .55 1.40-1.50 1.25-1.35 1.25-1.35 In/hr 2.0-6.0 >6.0 0.6-2.0 0.06-0.2 0.6-2 .0 0-? 1-23 23-60 !5-21 25- 35 25-35 7e-21 18-35 1.30-1.{0 1.40-1.50 1 .40-1.50 0.6-2 .0 0.6-2 .0 0. 6-2 .0 2.0-6.0 0 .6-2 .0 2.0-6.0 0-3 3-14 1{-60 0-8 8-19 19 10-20 15-25 10-27 0-6 6-16 16 0-3 3-13 13- 31 0-? 7-22 22-50 31 15-23 I 1.25-1 .35 20-27 I 1.35-1.45 ---l I I 20-27 | 1.15-1 .25 0.2-0.6 35-4s | 1.20-1.30 10.06-0.2 35-45 I 1.20-1.30 -'-l I 18-2? I 1.15-1.25 35-5011.15-1.30 18-35t1.20-1.35 I I 10-30 I 1.20-1.30 5-35 I 1 .30-1.50 0.06-0.2 0 0 0 0 0 0 6-2 O-a 6-2 2_1 0 0 6-2 6-2 6-2 0.6-2.0 0 .2-0.6 0.2-0.6 0-4 4-30 30 0. 6-2 .0 0.6-2 .0 0-4 4-30 I 20-35 30 1.40-1.50 10-30 | 1.20-1.30 5-35t1.30-1.50 ---l 4 30 0- 4- 30 0 0 I in 0.05-0.0? 0.05-0.0? 0.0?-0 .1 0 0.09-0.12 I 0.03-0. ? 0.08-0.10 0.08-0 .1 0 pH 0.08-0.12 0.1 0-0.12 I 0.08-0.13 0.1 4-0.1? | ? .4-8 .4 0.14-0 .2111 .4-8.4 0.08-0.181?.4-8.4 6.1-?.8 6.1-7.8 6.6-?.8 5.6-?.8 7 .4-8.4 7 .4-8.4 1.4-e.4 7.9-9.0 6.6-?.8 1 .4-8.4 0.09-0.11 17.4-9.0 0.09-0.11 7.4-9.O 0.16-0.18 0.15-0. I ? 0.15-0.1? 6.6-?.8 5.6-? .8 ? .4-8 .4 6.1-8.4 6.1-8.4 10.15-0.18 | 6.5-?.8 6.6-8.4 ?.9-9.0 0.19-0.21 0.19-0.21 0 .06-0.1 0 0.10-0.18 0.12-0.16 0.05-0.10 0.10-0.18 5.1-8.4 5.1-8 .4 5.1-8.4 6.1-8.4 I nnhos cm <2 -:: I I Lou------- I Lou------- I Lou------- I Moderate I Lou------- I I Low------- I Moderate I Moderate I lLout-- ----- 0.10 0.05 0. 10 0.05 0.15 I 5 I 1 a 5 1 4 <2 <2 <2 <2 <4 <2 <2 <2 <2 _::_ <2 _:1 0.3? 0.3? 0.28 <2 <2 <2 0.10t 5 lLou,------- 10.101 I Low------- 1 6. 1 6 I I I Lor------- I Lout------- t---------- I I Low------- I Lou-------t-----'---- I I I Low--=---- I High------ I H19h------ t---------- I I Low------- I Moderate 0.05 0.10 Moderate Low-------0.32 Moderate 0.28 0.05 !_!l 0.28 0:32 !:ll 2 <2 <4 o.32 0 .3? 0.3? <2 <2 28 <2 <2 <2 _:1 0 28 I Low-------0.32 I ----l 8 8 4 ? 1 6 6 1 7 Pct 2-4 Z-s 7-2 J,-J 2-4 t-2 2-4 t-2 <1 <l <1 RocI outcroP. 106r: TrldeIl--------- tlllttlttlllI o-2 I 1o-15 I 1.25-1.35 II 2-31 I 5-1s I 1.35-1 .55 | I 3?-60 I 0-5 I I .35-1.55 Ittll 0 I 6 5-2 0-6 0 0.11-0.13 0.06-0.10 0.05-0.10 <2 <2 <2 llrltrllr I Lout------- I 0.15 I 3 lLou-------10.101 I Low------- I 0.02 Iltr I See footnote at end of table 0-20 0 1 .4-8.4 7.9-9.0 7.9-9.0 7-4 tl t----llttt I I I I I I I I I I I I I I I I I I I I I I I I I I I I I t, I I I I I I I I I I I I I I I I I I I I I I Soil SurveY 252 TABLE15.-.PHYSICALANDCHEMICALPRoPERTIESoFTHEsolLs.-continued ll Soil nanre and lDePthlCIaY map symbol I I-ll l4o i st bulk densltY Permea- lAvailable I Soil bl I lty hrater I reaction I SaIinitY I Shrink- I swell I Potent ia l I Eroslonl I factorstT-IK T e rod i- bl I tty 9rouP organic tnatter In I Pct I0-4 I 18-25 4-25 I 28-35 25 I --- Io-8 | 15-25 s-14 I 20-30 14-60 I 20-30 I I 0-10 I 15-20 10-32 I 27-30 32-60 0-6 6-t2 72-34 34-60 30-35 sl tnlhr o.6-2 0. 5-2 1.45-1.551 2.0-6 capac itY In/in 0.09-0.10 0 .11-0.12 lo.o4-0.091?.9-9.0 I o.08-0.1116.6-?-8 1 .25- 1 .30 1.25-1.30 1.30-1.35 1.35-1.45 1.35-1.50 PH ll- 106r: I I-Brounsto-- | 0-11115-20- 111-30115-20 I 30-60 I 5-10 5- 15 18-35 0-5 0 0 0 6.6-8.4 7.4-8 .4 7.9-8 .4 1 .9-8.4 7.9-8.4 7.9-8.4 ?.9-8.4 5.6-?.8 5.6-8.4 ? .4-8.4 197r, 108i: I uracca---------- I o-8 | 8-15 I 15-60 I I 199r, 1l0r: I Uracca---------- I 0-6 I 6-12 I 12-60 I Mersel---------- ! 9-?- | ?-18 I 18-601 18-25 ll111-------- | o-? l10-15'iina'.or" l1-211 6-25 121 t__-ll1rr-------- I 0-5 I15-25'iloar,"rr | 5-25120-35123 t-__ I 1 .40-1.50 I 1.30-1.401 1.55-1.65 2 .0-6.0 2.0-6.0 6.0-20 o.o6'-0.08 0.04-0.05 MergeI---------- I 0-8 I 8-20 I 20-60 10-25 18-25 1 8-25 0.6-2.0 0.5-2 .0 0 .5-2 .0 0.12-0.14 0.06-0.08 0 .04-0 .06 0.13-0.17 0.13-0.1? 0 .13-0 .1? 0.1?-0.19 0.18-0.20 0.18-0.20 0.06-0.18 0.12-0.18 0.12-0.14 0. 1 0-0 .12 0.08-0.10 0.08-0.10 5-15 I 1.40-1.50 18-35 11.30-1.40o-5 11.55-1.65 I 10-25t1.30-1.35 1 8-25 I 1 .35-1 .45 0 .6-2 .0 0. 5-2 .0 0 .6-2 .0 2.0-5.0 2 .0-6.0 0. 6-2 .0 o 'i:l'o 0.6-2 .0 0.5-2.0 0 .6-2 .0 0.5-2.0 0.2-0 .6 0 .2-0 .5 0.5-2.0 0 .5-2 .0 0 .6-2 .0 0.6-2.0 2 .0-6.0 0 .6-2 .0 0 .6-2 .0 2.0-6.0 2.0-6.0 6.0-20 0.08-0.11 I 0 .06-0 .08 o.o4-0.65 0.12-0.14 o.o6-0.08 0.08-0.11 0.06-0 .08 10.10-0.14 I 0.10-0.14 ?.9-8.4 ?.9-8. { lo. o4-0 .06 l?.9-8.4 I I 7.4-8 .4 | ?.4-8.4 I I 6.1-7 .3 I 6.1-? .3 0.16-0.18 0.19-0.21 6.1-?.8 ''l:l''1 vlooEleY 11{,115,116---- Yano 117r: Yel Jack--------- ca 111 11 1.05-1.25 I 1.15-1.35 I I I 1.35-1.401 1.35-1.40 I 1.40-1.tl5l I I 1 .15-1 .25 I 1.20-1.30 I 1 .20-1 .30 I tl I 1 .3s-1.45 I 1 .35-1 .45 I 1 .35-1 .45 I I 1 .35-1 .40 I 1.45-1.50 I 1.35-1.401 1.35-1.401 I I 1.35-1.50 t 11.40-1.45 I 1.35-1.45 t--- 25-1.35 35-1.45 I 11. 11. 0.6-2.0 0.6-2 .0 I I I I I I I l: I I I I I l,l I I I | 0.13-0.15 t0.08-0.10 4-8.4 4-8.4 9-8.4 1-? .3 1-? .3 1-? .3 1-? .8 1-7 .8 6.1-?.8 6.1-?.8 6.1-? .8 ? .4-? .8 ?.4-7.8 ? .4-? .8 7.9-8.4 l?. 17. l?. I I t6. t6. t5. I t5. t6.14-1810.94-0.98 1 0 -6-2.O 10-15 l1.oo-1.021 0.6-2.0 35-45 I 1.05-1.0? I 0 -05-0.2 25-3011.10-1.151 o -2'o'6 o.o9-0.1116.1-7.8 0 .0?-0 .09 5.5-7.8 o-. I| 0-12 172-28 I 28-60 II 0-5 I s-12 172-24 124-60 I I 15-2? l: 20-35 I 20-35 I I 10-2s I 5-181 20-35 I I 18-30 Itl Youga 1 1 9-------- ZiIlman 10.12-0.14 r see descrlption of the map unlt for composltion and behavior characLerlstics of the naP unlt- 1-3 mmhos/cm <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 I Low------- | 0.15 I I Lou------- I 0 - 10 I lLow-------10.051 3 llllLow------- 10.10 I 2 I Lor------- I 0.1? I I Low------- | 0.10 I ltl lLow-------10-151 4 I Lou------- I 0 .10 I I Low--'---- I 0 .05 I tlltll lLow-------10-101 2 lLow-------10.1?l ILow-------I0-10Itll lLow-------10.151 4 I Low------- I 0.10 I I Low------- | 0.05 I tll lLou-------10.101 1 I Los------- | 0.20 I t----------t----ltll lLou-------10.171 2 I Low------- I 0 .20 I t----------l----tl I Low------- I 0.3? lModerate I 0. {3 t----------l----tl 2 lLor-------10.281 5 I Lou------- I 0 .28 I I Lorr------- | 0 .28 I lll tll lLow------- 10.3? I 5 lModerate 10.32 I lModerate 10.321 tll lLon------- |0.241 2 lLotr-------10.1?l lModerage 10.15 I I Lon------- | 0 .15 I tll lLon-.------10.241 5 lModerate 10.201 lModerate l0-1? I lll lLos-------10-101 4 I Low------- I 0 .10 I I Low------- I 0 .05 I I Low------- I 0.05 I tll <2 -:1 <2 <2 I 5 4L 5 4L 8 8 6 5 5 5 5 5 Pct L-1 1-3 2-4 1-3 2-4 t-2 2-4 2-3 2-5 4-6 2-5 <1 TABLE 16.--SOIL AND - FEATURES (rFr'--^ng' and iwacer tabrer and Eerms such as 'Ealer' 'brlef, r anu pparent. are explalned ln the text. The symbol < meanaless thani > means more than. Absence of an entry lndlcates that ihe feature ls not a concern or that data were notest, lmated) t,E'o =ao-t,u,c 3 oPooo 9) CLo DepthMonthg Hlgh rater table I Eedrock Rlsk of corroslonSolI nane and map symbol Hydro- loglc 9rouP Frequency Duratlon Klnd lt l{onths lDeprhlHard- | | ness Uncoated lConcreeesteel I Potentlal frost actlon 3, 4, 5---- Acree tt I None-------- |tttt I None-------- |tt c c FE In lttttt I Low-------- I H19h----- Itttttt I Low-------- I H19h----- 1ttt >6.0 60 Low > 6.0 >50 Moderat,e 6,7--------------l Almy I I None-------- |tt >5.0B >60 I Low-------- I Hlgh----- | Lowttt I I ModeraLe--- 8t, 9t :AnseI------ 10" 11': Anvlk------ skyl lck---- Sl 19t 1n9--- Lzr , Arle------- Ansarl ---l- Rock outcrop. L3r: At enclo---- Azel t lne--- 14r: CaI I lngs--- YeI jack---- 15r, 15t: Charcol ---- Mord------- None-------- None-------- None-------- I None-------- None-------- None-------- None-------- None-------- None-------- None-------- None-------- None-------- B B B B c c D B B c B B c None- >5.0 >6.0 >5.0 >6.0 >6.0 >6.0 >6.0 >50 >50 >60 >50 >60 Moderate Moderate Low Low Lotr Low Low Low Low Low Low LovJ Moderate--- Moderat,e--- Moderage--- lModerat,e--- Low-------- Low-------- I Low-------- Low-------- Moderat,e Moderat.e Moderate Hlgh----- H19h----- High--- -- High----- Moderace. 20-40 -210 >60 60 fr, rdHa '6 'to >6.0 >5.0 >6.0 60 60 >5 >50 >50 Moderat e---l.toderate Moderate--- | Moderate I I Low-------- | Moderate I Moderat,e--- | Moderate I Moderat e Low See footnote at end of table. >6 Nur(, Eloodlng t--- I l--- I 0 0 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I TABLE 16.--soIL AND WATER 3S--Contlnued R1 sk of corroslon F1 nE Hlgh uatcr table Potentlal Uncorted eoncreteD€pt h Hard-frogt actlon I steelHonth3DePthKInd lMonthsDurttlonSolI nane and map sYmbol 42. Fluvaquents 43r, 44r: ForeI Ie---- Brounsto--- 45, 4 6, q1-------- Eorsey 49, 50----- Gosl ln 51, 52, 53-------- cothlc 54 GrotLe 55r: Gypsurn Iand Gypslorthlds----- 56,5?----- Ipson I r rawaddY 59,60,61, Iyers 63,64----- Jerry 65r,66*,6?r: Je ETY Ml I lerlake- 62---- Hydro- loglc 9roup FrequencY D occaalonal-- I None-------- I I None-------- I I None-------- None-------- None-------- None-------- None-------- B lNone--------l None-------- I lNone-------- I I I None-------- None-------- I None-------- I lNone-------- I I Brlef----- B B B c B e B I I I I I I I I I D c D c c B B See footnote at end of teble' >6. r.-SePMa FT 0. 6-2.0 >6.0 0 >6.0 >6.0 >6.0 I >5 >6 0 >6.0 0 trenAppa llne I I -l a!(D =Io !,aE = (D .P ooo ot CLo Har-SeP 60 60 60 60 60 60 60 Htqh----- tow------ Low-------- Hoderate--- Moderate--- Low-------- I HoderaLe--- I I I Lou-------- I tllgh----- I Lou. I I I HIEh----- I Lou. I Hlgh----- I Lor. I HtEh----- I }loderate ' I I Hoderate lLor. I I Hlgh----- I Low. I I Hlgh----- I Low. I I Hlgh----- I Low. I lLou. I ILon. I I >60 rlltllttl I 10-{0 I soft I Lou-------- l Htsh----- l Hlgh ' Modertte--- I HlEh----- I Hoderat e Hoderate---Hlgh----- I Lor. I Moderate---Hoderate lLou. I Uoderate---Hlgh----- I Lor. Moderete---Hlgh----- I Lor. Hard I >60 I I I 20-40 I I I 20-10 I I I >60 I I I I >60 I I >60 I I >60 i I I uoderate--- I Hlgh----- tl I Moderate--- I High----- tlql N(n(, In I I I I I I I None-------- | I >6.0 I I >6.0 I I >6.0 I I >6.0 I I >6.0 I I >6.0 I tltltlI >6.0 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Soft t It--- I I It--- It--- It--- I I I I I I I I I I I I TABLE 16.--soIL AllD rAtER FBAft RES--Contlnucd Soll name and nap synbol Ploodlng Frequeney I Duratlon lt{onths I Depth I Xlnd l}{onthg lDcpthlHard- | I I I I I I lneaal eeter table I Bedrock I Potentlal frost ectlon ilak of corroelon llydro- loglc 9roup Uncoated ateel concrcte 94r,95*: Morval ----- 96, 91, 98, 99- Southace 100r: Sta rley---- Ste rman---- 101r,102r,103r: Tenna------ Plnel I 1---- 104r: Torrl orthent B---- Camborthlds Rock outcrop. 105r: Torrlorthents---- Rock outcrop 106r: Trldel I ---- Brownsto--- 10?*,108*,109*, 110*:. Uracca---------- ite rge 1 ---------- 1 1 1 -------- Vandanore LL2-------- [foodha 1I 1 I 3 -------- lfoos I ey B B None-------- I I None-------- None-------- None-------- None-------- None-------- None-------- None-------- None-------- tt I None-------- |tt I None-------- | None-------- None-------- None-------- None-------- None-------- D D D D D B D B B B B B c c See footnote at end of table >6.0 20- PT >6. 0 0 >6 >6 >6 >6 >6 >6 >6.0 >6.0 0 0 >6 ttI >6.0 IttI >6.0 I >6 >6 0 0 >?. o fn >60 >60 8-20 I Hard I 5-20 I llard 4-30 I tlard I I I I Moderate--- Lou-------- I Hoderate--- I I I Los-------- I I Low-------- Low-------- Lor-------- rd lLow-------- I I Htsh----- lltgh----- Hlgh----- Hteh----- Htsh----- lll9h----- Htgh----- at,(D =Io !,aC = (Dp oo o o, CLo I Low-------- I Hl gh----- Lou, Lor Lor Lorr Low Low Los Lou Low 4020- >60 6015- 4-40 1020- 20-qo 0 f.tSo Ha High----- ttl I Hoderate--- I Hl9h----- I Moderate.lrl I Hoderate--- I Hlgh----- I l,or. >60 >60 >60 >50 lltl I Low-------- I Hiqh-----tt I Moderate--- I Moderate Loo Moderate--- I Moderate Lolr. tlll Low-------- I Hoderate I Low. llll Ha rd I Mode rate--- I Hlgh- ---- | Low.tttltt Low rdHa llard N Or iil I I I I I I I I I I I I I I I I I I I I I I I I I I I I I