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Home My WebLink About1.09 Soils informationr • fF P> F(/ % r SOIL INFORMATION MAP FOR RTZ GRAVEL PIT ro A � ■ A 10 -" ALE: DATE: SHEET- -300' Sept. 10, 2008 1 OF 1 riV BY: - DRAWING: RVFr jCHKD BY. JAPPD BY. AWZ TAZ solt.dwg cz Cu I CD v W ciii, " .- \3 011i OF TOTAL ARi /A 73 021% OF wrx IIIIII RTZ INDUSTRIAL LLC Post OFMCE BOX 1906 – 1011 GRANO AVENUE CLEF WOW SPRINGS. COLORADO 51602 (970) 945-5700 FIGURE NO. PROJECT: 26419 f 72 —GRAVEk PIT 130UNDRY Map Unit Description Rifle Area, Colo redo. Pon d Gw1i and M as a Counties 72 Wan I sandy 102 11 to 3 percent a I OPOID Soffing comp"Won DIS cii Pliorr of wann sefiliv La"Myx Tema-s. valley Rots DoAndupesl,&": Cojivexkiwir Acr=11i Mali Convex. linear III Malarl;il- ARMurri derived from III or< Sli p(opartles and C)0N9W24 Spill: I IQ 3 Fame rot ❑rminAge EIM Poorly drAned Capfi* 0II nx)A 14ii layer 10 Iran4mir water 01K m): Hqh (2-Do tD 6 Do "W) III I* Water bWw About 0 to 0 11111 Frequency *(Whg: Occasional FMuaWQfPxx4V; None CnJdumautoriftmaxlrnurn: 10perue(A GYP4- mri a peux-N Avadfibld VrWer capliI ty-. Ho (ADMA 1 .7 W110W lnk?FWM "ILIP111 I-Wid C*M[tyds&uftvfiw (h4alftft 4w Le"' (non trNillaWy- Sw ew=x Sii Memdaw (RUMY2000) Tw" effime 0 to 8 W-1i S"Y loom 8 le W kKbw Be sandy III sandy loam, 0I sandy NUM Map Un ft D esciii o n RU Arsk Cdoi Parts or Gmi acrd Mass CouryUm 3 Arado ban I to 6 percent slaiiii sett ElevviIiort 5100mlii Composbon Dondpli of jki ustfing LarKli T6,j $1 rum Dami-ftposNpe; Qwvsx. Iiii ==1=cmveg' linear III a1W um derived roam sandstone ad *W* Propel i III QuWi SIDIM 110 a PdMOrd Oriii oftes. Wd iii Mod&vMykworw*dft=WyN0(0.(Ala FregrrengaiikoSMQ: Nana IM 10 PKMI Gi m"Mm.- zoo peem Salli * miukimm Vo4v iiiii serve or moderately saline (4 0 to 1a "0 w*czkm) Sodii edaorpEen mrpafnaI 30.4 Avalii writer capoW. Mod"s (41bM LO iirchazj ln*rpw&o Groups I 0i d"aft"on (jerwliti,4 76 UI cepribli (non killilded). 7* 401 =.:r1 ti= SALT FLATS (04aXY261C0) TywwPMft 0 to 3 iw-Au: bW 3 to 17 InW*r III day hFam 17 to So in&"! gTol d•y loam Minor Components wonn Pafe" Or MAP Urit 5 11 Lmdlwn: Taft'W4 Division of Reoiamation Mining & Safety Permit Application RTZ INDUSTRIAL SAND & GRAVEL MINING OPERATION GARFIELD COUNTY, COLORADO 6.4.1 EXHIBIT I — Soils Information SOIL SURVEY OF RIFLE AREA, COLORADL , .,ARTS OF GARFIELD AND MESA COUNTIES R`iZ Industrial Meters Feet 0 50 100 200 0 150 300 600 900 1,2 00 USE)A Natural kc, wre Wc:b Soil Survey 1.1 1131/2007 fonwrsacam tiemce National Cooperative Soil Survey Pagge 1 of 3 SOIL SURVEY OF RIFLE AREA, COLORADO, PARTS OF GAR FIELD AND MESA COUNTIES r MAP LEGEND MAP INFORMATION S64 Map Units v Cities Source of Map: Natural Resources Conservation Service Detawd Counties Web Soil Survey URt_: hfp : //Websoilsurvey.nres.usda.gov Detailed States Roads Coordinate System: UTM Zone 12 �'— Baas Soil SurveyArea: Rifle Area, Colorado, Parts of Garfield and Water Mesa Counties rtydrography Spatial Version of Data: 1 ❑canna Soil Map Compilation Scale: 1:24000 ATATATAT Escarpment bedrock vnvnvnv. Escarpment, non-bedmck n Gultey 011111141101 Levee ........ Slope v ftwout Sorrow Pit X Clay Spot Depression, closed — Eroded Spot X Gravel Pit Gravelly Spot 4 Gulley A Lava Flow ® Landfrii 4 Marsh or Swamp Map comprised of aerial images photographed on these dates: ® Miscellaneous Water 912111583 V Rocs[ Outcrop Saline Spot Sandy Spot 3� Slide or Slip 0 Sinkhole 9 Sodic Spot Spoil Area The orthophoto or other base map on which the soil lines were compiled and o stony spot digitized provably differs from the background imagery displayed on these maps_ {p Very Stony Spot As a result, some minor shifting of mar) Unit boundaries may be evident Wet Spot USDA NaturARew� Web Soil survey I A 1/31/2607 ctaxw rarimm scrrice Nalional Cooperativc Soil Survey Page 2 of 3 Soil Survey of RiDo Area Colorado, Parts ofkiarfield and Mesa Counties Map Unit Legend Summary Rifle Area, Colorado, Parts of Garfield and Mesa Counties Map Unit Map Unit Name Acres in AOI Percent of AOI Symbol 3 . Arvada loam, 1 to b percent slopes 127;4 4 Arvada loam, 6 to 20 percent slopes 9.4 5.6 65 . `Corrwuveirits, nearly 1�yei';'j. 2.9. :. 1.7 72 Wann sandy loam, 1 to 3 percent slopes 15.1 9.0 - f. YY, i- .. - RTZ Industrial USOA IMs arm} Re rm Web Soil Survey 1.1 1/31/2007 cowrYMIOA Smile Na[ianal Cooperative Soil Survey Page 3 of 3 Chemical Soil Properties Rifle Area, Colorado, Parts of Garfield and Mesa Counties Map symbol megIT00 g meq/100 g Cation. Effective cation - Arvada 0 -3 Calcium 3-17 20 -35 - -- Sodium and soil Warne Depth exchange exchange Soil reaction carbon Gypsum Salinity adsorption 4.0.16.0 10 -30 capacity capacity 0 ate 0 7.4-8.4 ratio in megIT00 g meq/100 g 3: mmhoskm Arvada 0 -3 10 -25 3-17 20 -35 - -- 17-60 15 -30 - 72: 5 -10 Wann 0 -8 10 -20 - 8 -60 5.0 -15 pN Pct Pct mmhoskm 7.9 -9.0 5 -10 0 0.0 -4.0 0 -10 8.5 -11.0 5 -10 0 -1 0.0 -4.0 10 -30 71-9 -0 5 -10 0 -2 4.0.16.0 10 -30 7.4 -8.4 5 -10 0 0.0 -2.0 0 7.4-8.4 5 -10 0 0.0 -2.0 D USDANatural Resources This report shows only the m ajar soils in each mapun;t. Others may exist. Tabular Data Version: 3 Conservation Service Tabular pata Version Date: 01/10/2007 Page 1 of 2 Chemical Soil Properties This table shows estimates of some chemical characteristics and features that affect soil behavior. These estimates are given for the layers of each soil in the survey area. The estimates are based on field observations and on test data for these and similar soils. "Depth" to the upper and lower boundaries of each layer is indicated. "Cation- exchange capacity" is the total amount of extractable bases that can be held by the soil, expressed in terms of milliequivalents per 100 grams of sell at neulratity (pH 7.0) Dr all some other stated pH value. Soils having a low cation- exchange capacity hold fewer cal ians and may require more frequent applications of fertilizer than soils having a high cation -exchange capacity. The ability to retain cations reduces the hazard of ground -water pollution. "Effective cation - exchange capacity" refers I the sum of extractable bases plus aluminum expressed is terms of milliequivalents per 100 grams of soil: It is determined for soils that have pH of less than 5.5. "Soil reaction" is a measure of acidity or alkalinity. It is important in selecting crops and other plants, in evaluating soil amendments for fertilily and stabilization, and in determining the risk of corrosion. "Calcium carbonate" equivalent is the percent of carbonates, by weight, in the fraction of the soil less than 2 millimeters 1n size. The availability of plant nutrients is influenced by the amount of carbonates in the soil. Incorporating nitrogen fertilizer into calcareous soils helps to prevent nitrite accumulation and ammonium -N volatilization. "Gypsum" is expressed as a percent, by weight, of hydrated calcium sulfales in the fraction of the soil less than 20 millimeters in size. Gypsum is partially soluble in water. SDiIS that have a high content of gypsum may collapse if the gypsum is removed by percolaling water. "Salinity" is a measure of soluble salts in the soil at saturation. II is expressed as the electrical conductivity of the saturation extract, in millimhos per centimeter at 25 degrees C. Estimates are based on field and laboratory measurements at representative sites of nonirrigated soils. The salinity of irrigated soils is affected by the quality of the irrigation water and by the frequency of water application. Henoe. the salinity of soils in individual fields can differ greatly from the value given in the table. Salinity affects the suitability of a soil for crop production, the stability of sail ilused as construction material, and the potential of the sail to corrode metal and concrete. "Sodium adsorption ratio" (SA R) is a measure of the amount of sodium (Na) relative to calclum (Ca) and magnesium (Mg) in the water extract from saturated soil paste. It is the ratio of the Na concentration divided by the square root of one -half of the Ca + Mg concentration. Soils that have SAR values of 13 or more may be characterized by an increased dispersion of organic matter and day parlicles, reduced saturated hydraulic conductivity and aeration, and a general degradation of sail structure. USDANatural Resources This report shows only the m*r seism each map unit. Others may exist. Tabular Data Version: 3 Conservation Service Tabular Data Version Date: 01/1012007 Page 2 of 2 Soil Survey of Rifle Area, Colorado, Parts of Garfield and Mesa C:ounI ies RTZ Industrial Map Unit Legend Summary Rifle Area, Colorado, Parts of Garfield and Mesa Counties Map Unit Map Unit Name Acres in AOI Percent of AOI Symbol 3 Arvada loam, 1 to 6 percent slopes 127.4 76.1 4 Arvada loam, 6 to 20 percent slopes 9A 5.6 65 Torrifluvents, nearly level 2.8 1.7 72 Wann sandy loam, 1 to 3 percent slopes 15.1 9,0 73 watei . 12.8: 7.7 ISDA NmtnrA Re- w m Web Soil Survey 1.1 1/31/2007 IM 'Umwrsadon Sen#ce National Cooperative Soil Survey Page 3 of 3 Map Unit Description Rifle Area, Colorado, Parts of Garfield and Mesa Counties Arvada loam, 1 to 6 percent slopes Setting Elevation: 5100 to 6240 feet Composition Arvada and similar soils: 80 percent Minor components: 5 percent Description of Arvada Setting Landform: Terraces, fans Down -slope shape: Convex, linear Across -slope shape: Convex, linear Parent material: Highly saline alluvium derived from sandstone and shale Propert ies and Qualities Slope: 1 to 6 percent Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ks at): Moderately low or moderately high (0. 06 to 0.20 lydhr) Frequency of flooding: None Frequency of ponding: None Calcium carbonate maximum: 10 percent Gypsum maximum: 2 percent Salinity maximum: Very slightly saline or moderately saline (4.4 to 16.0 mmhoslcm) Sodium adsorption ratio maximum: 30.0 Available water capacity: Moderate (about 8.0 inches) Interpretive 0roups Land capability classification (irrigated): 7s Land capability (non irrigated): 7s Ecological site: Salt Fiala (R04BAY261 CO) Other vegetative classification: SALT FLATS (048XY261CO) Typical Profile 4 to 3 inches: loam 3 to 17 inches: silty clay loam 17 to 60 Inches: silty clay loam Minor Components Wann Percent of map unit: 5 percent Landform: Terraces USDA Natural Resources Tabular Data Version: 3 Conservation Service Tabular Data Version Date: 0 111 012 0 07 Page 1 of 2 Map Unit Description Rifle Area, Colorado, Parts of Garfield and Mesa Counties 72 Wann sandy loam,1 to 3 percent slopes Setting Elevation: 5000 to 6500 feet Composition Wann and similar soils: 85 percent Description of Wann Setting Landform: Terraces, valley floors Down -slope shape: Convex, linear Across -slope shape. Convex, linear Parent material: Alluvium derived from sandsione and shale Properties and Qualitlas Slope: 1 to 3 percent Drainage class: Poorly drained Capacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6,00 in/hr) Depth to water table: About 4 to 0 inches Frequency of flooding: Occasional Frequency of ponding: None Calcium carbonate maximum: 10 percent Gypsum maximum: 0 percent Available water capacity: High (about 8.7 inches) Interpretive Groups Land capability classification (irrigated): 4w Land capability (non irrigated): 6w Ecological site: Sall Meadow (R048AY285CQ) Typical Profile 0 to 6 inches: sandy loam 8 to 60 inches: fine sandy loam, sandy Ioam, coarse sandy loam USDA Natural Resources Tabular Data Version: 3 Conservation Service Tabular Data Version Date: 01/10/2047 Page 2 of 2 Irrigated and Nonirrigated Yields by Map [Unit RIi3e Area, Colorado, Parts of Garfield and Mesa Counties Map symbol Land capability Alfalfa hay VVwat and soil name — N I N I N I Tons Tons Su Su 3: 3.00 - -- 40 Arvada 7s 7s 72: - 3.50 -•- - -- Wann 6w 4w JSDANatural Resources This report shows" IN major sas In each map unt Others may aid st Tabular Data Version: 3 Conservation Service Tabular ❑ata Verslon Date: 01A012007 Page 1 of 3 Irrigated and Nonirrigated Yields by Map Unit The average yields per acre that can be expected of the principal crops under a high level of management are shown in this table. In any given year, yields may be higher or lower than those indicated in the table because of variations in rainfall and other climatic factors. The yields are based mainly on the experience and records of farmers, conservationists, and extension agents. Available yield data from nearby counties and results of field Trials and demonstrations also are considered - The management needed to obtain the indicated yields of the various crops depends on the kind of soil and the crop. Management can include drainage, erosion control, and protection from flooding; the proper planting and seeding rates; suitable high yielding crop varieties; appropriate and timely tillage; control of weeds, plant diseases, and harmful insects; favorable soil reaction and optimum levels of nitrogen, phosphorus, potassium, and trace elements for each crop; effective use of crop residue, barnyard manure, and green manure crops; and harvesting that ensures the smallest possible loss. I€ ylelds of Irrigated crops are given, it is assumed that the irrigation system is adapted to the soils and to the crops grown, that good - quality irrigation water is uniformly applied as needed, and that tillage is kept to a minimum. Pasture ylelds are expressed in terms of animal unit months. An animal unit month {AUNT} is the amount of forage required by one mature caw of approximately 1.400 pounds weight, with or without a calf, for 1 month. The estimated yields reflect the productive capacity of each soil for each of the principal crops. Yields are likely to increase as new production technology is developed. The productivity of a given soil compared with that of other soils, however, is not likely to change. Crops other than those shown in the table are grown in the survey area, but estimated yields are not IIsted because the acreage of such crops is small. The local office of the (Natural Resources Conservation Service or of the Cooperative Extension Service can provide information about the management and productivity of the soils for those crops. The land capability classification of map units in the survey area is shown in this table. This classification shows, In a general way, the suitability of soils for mast kinds of field crops (United Slates Department of Agriculture, Soil Conservation Service, 1961). Crops that require special management are excluded. The soils are grouped according to their Iirnitations for field crops, the risk of damage if they are used for crops, andlhe way they respond to management. The criteria used in grouping the soils do not Include major and generally expensive landforming that would change slope, depth, or other characterisllcs of the soils, nor do they include possible but unlikely major reclamation projects. Capability classification is not a substitute for interpretations designed to show suitability and limltatlons of groups of solIs for rangeland, for forestland, or for engineering purposes. In the capability system, soils are generally grouped at three levels -- capability Gass, subclass, and unit. "Capability classes," the broadest groups, are designated by the numbers t through S. The numbers indicate progressively greater limitations and narrower choices for pfactical use, The classes are defined as follows: Class 1 soils have slight limitations that restrict their use. Class 2 soils have moderate limi tell on$ that restrict the chaise of plants or that require moderate conservation practices. Class 3 soils have severe limitations that restrict the choice of plants or that require special conservation practices, or both. Class 4 soils have very severe limitations that restrict the choice of plants or that require very careful management, or both. Class 5 soils are subject to little or no erasion but have other limitations, impraclical to remove, that restrict their use mainly to pasture, rangeland, forestland, or wildlife habitat. Class 6 soils have severe limitations that make them generally unsuitable for cultivation and that restrict their use mainly to pasture, rangeland, forestland, or wildlife habitat. Class 7 soils have very severe limitations that make them unsuitable for cultivation and that restrict their use mainly to grazing, forestland, or wildlife habitat. Class 8 soils and miscellaneous areas have limitations that preclude commercial plant production and that restrict their use to recreational purposes, wildlife habitat, watershed, or esthetic purposes. "Capability subclasses" are soil groups within one class. They are designated by adding a small fetter, "e," "w," "s " or "c," to the Gass numeral, for example, 2e. The Letter "e" shows that the main hazard Is the risk of erosion unless close- growing plant cover Is maintained; W shows that water In or on the soil Interferes with plant growth or cultivation (in some soils the wetness can be partly corrected by artificial drainage); "$" shows that the soil is limited mainly because it is shallow, droughty, or stony: and "c," used in only some parts of the United States, shows that the chief limitation is climate that is very cold or very dry. In class 1 there are no subclasses because the soils of this class have few limitations. Class 5 contains only the subclasses Indicated by "w," "s," or "a" because the soils in class 5 are subject to little or no erosion. They have other limitations that restrict their use to pasture, rangeland, forestland, wildlife habitat, or recreation- "Capability units" are soil groups within a subclass. The soils in a capability unit are enough alike to be suited to the same crops and pasture plants, to require similar management, and to have similar productivity. Capability units are generally designated by adding an Arabic numeral to the subclass symbol, for example, 2e -4 and 3e -6. These units are not given in all soil surveys. Reference' JSDANRtural Resources This report aroma unPy tha major sotls in each map unit. Others may exW. Tabular Data Version: 3 Conservation Service Tabular Data Version Date: 0111012007 Page 2 of 3 Forestiand Planting and Harvesting Rifle Area, Colofado, Parts of Garfield and Mesa Counties [The information in this table indicates the dominant soil condition but does not eliminate the treed for onsite investigation. The numbers in the value columns range tram 0.01 to 1.00. The larger the value, the greater the potential limitation. The table shows aniy the top five (imitations for any given soil. The soil may have additional limitations] 3: Arvada 80 Moderately suited Stickiness; high plasticity index 72: Wann 85 Well suited Moderately suited 0.60. Stickiness; high . . . plasticity index Weil SOW Moderately suited 0.50 Low strength 0.50 Well suited JSDANaWral Resources This report shows only [her major soils 0 each map urNt- Others may exist. Tabular Data Version: 3 Conservation Service Tabular Data Version Date: 0111012007 Page 1 of 2 Pcl. Suitability for hand planting Suitability for mechanical Suitability for use of harvesting Map symbot of planting equipment and soil name map unit Rating class and Value I Rating Gass and Value I Rating class and Value limiting features limiting features limiting features 3: Arvada 80 Moderately suited Stickiness; high plasticity index 72: Wann 85 Well suited Moderately suited 0.60. Stickiness; high . . . plasticity index Weil SOW Moderately suited 0.50 Low strength 0.50 Well suited JSDANaWral Resources This report shows only [her major soils 0 each map urNt- Others may exist. Tabular Data Version: 3 Conservation Service Tabular Data Version Date: 0111012007 Page 1 of 2 Forestiand Planting and Harvesting This table can help forestland owners or managers p €an the use of soils for wood crops. Interpretive ratings are given for the suits according to the limitations that affect planting and harvesting an forestland. The ratings are both verbal and numerical. Rating class terms indicate the degree to which the soils are suited to a specified aspect of forestl and management.'Wei I suited" indicates that the soil has features that are favorable for the specified management aspect and has no limitations. Good performance can be expected, and little or no maintenance is needed. "Moderately suited" indicates that the sail has features that are moderately-favorable for the specified management aspect. One or more soil properties are less than desirable, and fatr performance can be expected. Some maintenance Is needed. "Poorly suited" indicates that the soil has one or more properties that are unfavorable for the specified management aspect. Overcoming the unfavorable properties requires special design, extra maintenance, and cosily alteration. "Unsuited" indicates that the expected performance of the soil Is unacceptable for the specified management aspect or that extreme measures are needed to overcome the undesirable soil properties. Numerical ratings in the table indicate the severity of Individual limitations. The ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate gradations between the point at which a soil feature has the greatest negative impact an the specified aspect of €ores #land management (1.00) and the paint at which the soil feature Is not a limitation (0-00). The paragraphs that follow indicate the soil properties considered in rating the soils. More detailed Information about the criteria used in the ratings is available in the "National Forestry Manual," which is available in local offices of the Natural Resources Conservation Service or on the Internet. Ratings in the columns "suitability for hand planting" and "suitability for mechanical planting" are based on slope, depth to a restrictive layer, content of sand, plasticity index, rock fragments on or below the surface, depth to a water table, and pond €ng. The soils are described as well suited, moderately suited, poorly suited, or unsuited to these methods of planting. It is assumed that necessary site preparation Is completed before seedlings are planted. Ratings in the column "suitability for use of harves ling equipment" are based on slope, rack fragments on the surface, plasticity index, content of sand, the Unified classifical I on, depth to a water table, and ponding. The soils are described as well suited, moderately suited, or poorly suited to this use. Reference' United States Department of Agriculture, Natural Resources Conservatlon Service. National forestry manual. ( htip1isoils .usda.govitechnicalInfrnanua€1) JSDANatural Resources TNs report stews nNy the major sods in each map unit. Others may axis! Tabular Data Version- 3 4[lSQrV &L1Dt1 Service Tabular Data Verslon Date: 01/10/2007 Page 2 of 2 Map unit Description Rifle Area, Colorado, Parts of Garfield and Mesa Counties Arvada loam, 1 to 6 percent slopes Setting Elevation: 5100 to 6200 feet Composition Arvada and similar sobs' 80 percent Minor components: 5 percent Description of Arvada Setting Landform: Terraces. fans Down -slope shape: Convex, linear Across slope shape: Convex, linear Parent material: Nighty saline alluvium derived from sandstone and shale Properties and Qualities Slope: 1 to 6 percent Drainage Gass: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately low or moderately high (0.06 to 0.20 inlhr) Frequency of flooding: None Frequency of ponding: None Calcium carbonate maximum: 10 percent Gypsum maximum: 2 percent Salinity maximum: Very slightly saline or moderately saline (4.0 to 16.0 mmhoslcm) Sodium adsorption ratio maximum: 30.0 Avallahle water capacity: Moderate (about 8.0 inches) Interpretive Groups Land capability classif €cation (irrigated): 7s Land capability (non irrigated): 7s Ecological site: Salt Flats (R048AY261C0) 01 her vegetative classification: SALT FLATS QD48HY261CQ) Typical Profile 0 to 3 inches: loam 3 to 17 inches: silty clay loam 17 to 60 inches: silty clay loam Minor Components Wann Percent of map unit: 5 percent Landform: Terraces JSDA Natural Resources Tabular Data Version: 3 Con servatlon Service Tabular Data Version pate: 0111012OO7 Page 1 of 2 Map Unit Description Rifle Area, Colorado, Parts of Garfield and Mesa Counties 72 Wann sandy loam, I to 3 percent slopes Setting Elevation: 5000 to 6501D feel Composition Wann and similar soils: 85 percent Description of Wann Setting Landform: Terraces, valley floors Down slope shape: Convex, linear Across -slope shape: Convex, linear Parent material: Alluvium derived from sandstone and shale Properties and Qualities Slope: Ito 3 percent Drainage class: Poorly drained Capardty of the most limiting layer to transmit water (K9 at): High (2,00 to 8,00 inlhr) Depth to water table: About 0 to 0 inches Frequency of flooding: Occasional Frequency of pond €ng; None Calcium carbonate maximum: 10 percent Gypsum maxlmum: 4 percent Available water capacity: High (about 9.7 inches) Interpretive Groups Land capability classification (irrigated): 4w Land capability (non irrigated): 6w Ecological site. Salt Meadow (RO48AY265CO) Typical Profile 0 to 8 inches: sandy loam 8 to 60 inches: Tine sandy loam, sandy loam, coarse sandy loam JSDA Natural Resources Tabular Data Version: 3 Conservation Service Tabular Data Version Cate: 01/1012007 Page 2 of 2 Rangeland Productivity and Plant Composition Rifle Area, Colorado, Paris of Garfield and Mesa Counties 35 10 10 10 10 10 USDANatural Resources Ths report shows only the major sails in each map UN- Others may exist. er Consvation SeMce 7ahular Data Version 3 Tabular Data Version Date: 0111012 007 Page 1 of 2 Total dry - weight production Map symbol Ecological site Characteristic vegetation Rangeland and sail name Favorable Normal Unfavorable a com p sition year year year 35 10 10 10 10 10 USDANatural Resources Ths report shows only the major sails in each map UN- Others may exist. er Consvation SeMce 7ahular Data Version 3 Tabular Data Version Date: 0111012 007 Page 1 of 2 Rangeland Productivity and Plant Composition In areas that have similar climate and topography, differences in the kind and amount of rangeland or forest understory vegetation are closely related to the kind of soil_ Effective management is based on the felati0nship between the soils and vegetation and water. This table shows, for each soil that supports vegetation suitable for grazing, the ecological site; the total annual production of vegetation in favorable. normal, and unfavorable years; the characteristic vegetation; and the average percentage of each species_ An explanation of the column headings in the table follows. An "ecological site" is the product of all the environmental factors responsible for its development. It has characteristic soils that have developed over time throughout the soil development process; a characteristic hydrology, particularly irrfltration and runoff that has developed over time: and a characteristic plant community NO and amount of vegetation). The hydrology of the site is influenced by development of the soil and plant community. The vegetation, soils, and hydrology are all interrelated. Each is influenced by the others and influences the development of the others. The plant community an an ecological site is typified by an association of species that differs from that of other ecologica l sites in the kind and/or proportion of species or in total production. Descriptions of ecological sites are provided in the Field Office Technical Guide, which is available in local offices of the Natural Resources Conservation Service (NRCS). "Total dry - weight production" is the amount of vegetation that can be expected to grow annually in a well managed area that is supporting the potential natural plant community. It includes alt vegetation, whethef or riot it is palatable to grazing animals. It includes the current year's growth of leaves, twigs, and fruits of woody plants. It does not Include the increase in stem diameter of trees and shrubs. It is expressed in pounds per acre of air-dry vegetation for favorable, normal, and unfavorable years. In a favorable year, the amount and distribution of precipitation and the temperatures make growing conditions substantially better than average. In a normal year, growing conditions are about average. In an unfavorable year, growing conditions are weft below average, generally because of low available soil moisture. Yields are adjusted to a common percent of air-dry moisture content. "Characteristic vegetation" (the grasses, (orbs, and shrubs that make up most of the potential natural plant community on each soil) is fisted by common name. Under "rangeland composition," the expected percentage of the total annual production is given for each species making up the characteristic vegetation. The amount that can be used as forage depends on the kinds of grazing animals and on the grating season. Range management requires knowledge of the kinds of soil and of the potential natural plant commimity. It also requires an evaluation of the present range similarity index and rangeland trend. Range sinlarity index is deterrrdned by comparing the present plant community with the potential natural plant community on a particular rangeland ecological site. The more closely the existing community resembles the potential community, the higher the range simiadty index. Rangeland trend is defined as the direction of change in an existing plant community relative to ft potential natural plant community. Further information about the range similarity index and rangeland trend is available in the "National Range and Pasture Handbook," which is available in local offices of MRCS or on the Internet. The objective in range management is to control grazing so that the plants growing on a site are about the same in kind and amain as the potential natural plard community for that site. Such management generally results in the optimum production of vegetation, control of undesirable brush species, conservation of water, and control of erosion. Sometimes, however, an area with a range sintitarity index somewhat below the potential meets grazing needs, provides wildlife habitat, and protects soil and water resources. Reference: United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. (hfipllwww.glti.mrs.usda.govl) USDA Natural Resources Tabular Data Version: 3 Conservation Service Tabular Data Version Date-. 01/1012007 This roW shows orNy Vin maior sods in each map unit_ Others may exist Page 2 of 2