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HomeMy WebLinkAbout1.0 ApplicationLOS AMIGOS RANCH FILING NO. 1 PRELIMINARY PLAT SUBMITTAL I. PREFACE The Garfield County Commissioners approved the Los Amigos Ranch Planned Unit Development by Resolution #79-15 dated February 6, 1979. Filing One consists of a tract of land 15.1 acres in size and is contiguous to County Road 114 adjacent to Colorado Mountain College. Filing One will consist of 96 apartment units designed primarily for C.M.C. student occupancy. Because Colorado Mountain College has indicated a need for housing by Fall 1979, Los Amigos Filing One is being de- voted to the land necessary for an apartment project. Filing Two will encompass remaining Phase One development as defined by the Los Amigos P.U.D. Application. The following submittal material is as required by Sec- tion 4.02 - Preliminary Plan Requirements - of the Garfield County Subdivision Regulations, adopted September 1, 1972, and amended April 14, 1975. V TABLE OF CONTENTS SECTION TITLE PAGE I Preface 1 II Subdivision Summary Form 2 (4.02.01,k.,4).) III Owner and Subdivider 3 (4.02.01,k.,2) & 3).) IV Land Area and Use (4.02.01,g.) 4 V Public Dedications 4 (4.02.01,k.,5).) VI Covenants (4.02.01,k.,6).) 4 VII Physical Information 4 (4.02.03) VIII Grading and Drainage 6 (4.02.04) IX Utilities (4.02.05) 6 MAP TITLE Map 1-1 Vicinity Sketch Map Map 1-2 Preliminary Plan and Adjacent Land Owners Map 1-3 Bedrock and Surficial Map Map 1-4 Soils Hazards Map Map 1-5 Slope Stability Map Map 1-6 Vegetation Map Map 1-7 Preliminary Grading Plan Map 1-8 Preliminary Drainage Plan Map 1-9 Schematic Utility Layout Map EXHIBITS TITLE Exhibit 1 Lincoln DeVore letter dated Sept. 14, 1978 Exhibit 2 Scarrow & Walker Preliminary Drainage Report Exhibit 3 Wright Water Engineers letter dated Octo- ber 5, 1978 Exhibit 4 Loyal E. Leavenworth letter dated October 6, 1978 Exhibit 5 Wright Water Engineers letter dated March 14, 1979 Exhibit 6 Holy Cross Electric Association letter dated March 13, 1979 Exhibit 7 Mountain Bell letter dated March 14, 1979 Exhibit 8 Delete Exhibit 9 Los Amigos Ranch Filing No. 1 Legal Description SUPPLEMENTAL INFORMATION MAP TITLE Map 1-10 Map 1-11 Map 1-12 EXHIBITS Exhibit 10 Exhibit 11 Exhibit 12 Master Water and Sewer System Plan Schematic Site Plan - Buildings and Utilities Interior Drive Centerline Plan and Profile TITLE Wright Water Engineers letter dated March 14, 1979 Colorado Mountain College, Anderson letter dated March 19, 1979 Well Decree for Underground Water Right • 1 II. SUBDIVISION SUMMARY FORM 4.02.O1,k,4). G. SUBDIVISION SUMMARY FORM Garfield County Type of Subdivision: Request for Exemption Date March 15, 1979 Preliminary Plan Final Plat Subdivision Name Los Amigos Ranch Filing No. 1Filing X Location of Subdivision TOWNSHIP 7 RANGE 88 SEC. 5 1/4 SE Owner(s) NAME Robert W. Chatmas, Thomas E. Neal, James A. R. Johnson ADDRESS c/o Sundesigns Architects, 1315 Grand Avenue, Subdividers) NAME Same as above ADDRESS Designer NAME Sundesigns Architects Glenwood Springs, CO 81601 ADDRESS 1315 Grand Avenue, Glenwood Springs, CO 81601 Type of Subdivision ( ) Single Family Number of Area Dwelling Units (Acres) of Total Area (X) Apartments 96 15.1 100 ( ) Condominiums ( ) Mobile Home ( ) Commercial ( ) Industrial N.A. N.A. Dedicated Reserved Dedicated Reserved Private Open Areas Easements Other (Specify) Street Walkways School Sites School Sites Park Sites Park Sites N/A N/A N/A N/A N/A Total Estimated Water Requirements Max. 45,000 (buildings & irriga— Gallons/day. Proposed Water Source Wells tion) Estimated Sewage Disposal Requirement 23,QQ0 Proposed Means of Sewage Disposal C.M.C. treatment facility ACTION: Planning Commission Recommendation Approval ( ) Remarks Disapproval ( ) Gallons/day. Date , 19 Board of County Commissioners ( ) Approval Remarks Date Disapproval ( ) , 19 • • III. OWNER AND SUBDIVIDER 4.02.01,k 2) and 3). Owner: Robert W. Chatmas Thomas E. Neal James A. R. Johnson c/o Sundesigns Architects & Planners 1315 Grand Avenue Glenwood Springs, Colorado 81601 Subdivider: Same as above Firm Preparing Submittal: Sundesigns Architects and Planners 1315 Grand Avenue Glenwood Springs, CO 81601 Owners of Adjacent Land: 1. Chatmas, Neal and Johnson Same as above 2. Colorado Mountain College Glenwood Springs, Colorado 81601 IV. LAND AREA AND USE 4.02.01,g A. See Map 1-2 Preliminary Plan V. PUBLIC DEDICATIONS 4.02.01,k.5). There are no public dedications within Filing One. Zoned areas for parks and a proposed school site are contained with- in the P.U.D. and will be addressed in later filings. Filing One is contiguous to County Road 114 and contains no new public rights-of-way. VI. PROPOSED COVENANTS 4.02.01,k.6). The Declaration of Protective Covenants is contained in the P.U.D. Application, Section XIII. Filing One improvements will be designed, constructed and maintained consistent with the P.U.D. Covenants. The owners of the land and improvements will be a part of the P.U.D. Association or other entities re- lating to utilities such as water and sewage disposal. VII. PHYSICAL INFORMATION 4.02.03 A. Geology 4.02.03,a. 1. See Map 1-3 Bedrock and Surficial Map 2. See Exhibit 1 - Lincoln DeVore letter dated September 14, 1978 B. Soils 4.02.03,b. 1. See Map 1-4 Soils Hazards Map and Map 1-5 Slope Stability Map 2. See Exhibit 1 - Lincoln DeVore letter dated September 14, 1978 C. Vegetation 4.02.03,c. 1. See Map 1-6 Vegetation Map D. Wildlife Habitat 4.02.03,d. Habitat, migration and winter range of deer and other wildlife species has been addressed in the - 4 - i • P.U.D. Application, Section XI. Prior to the land planning for the P.U.D., meetings were held with the Colorado Division of Wildlife. Major habitat areas and daily migration routes were identified and classed as open space. Key factors in determining Filing One wildlife im- pacts include the following: 1. Proximity to C.M.C. Filing One is adja- cent to C.M.C. and will have about the same density of buildings to gross acreage as C.M.C. 2. Internal open space. Approximately 60% of Filing One is open space not buildings, parking or roads. 3. External open space. Filing occupied by One is adja- cent to large acreages of open space in- cluding agricultural lands, sage areas and pinion/juniper vegetation. 4. Seasonal migration routes. Five lower/upper valley routes have been identified. These paths link remote high elevation slopes east of Spring Valley with sage -covered, south - facing bluffs above SH -82. These routes are identified as open space on the P.U.D. Plan and are not in proximity of Filing One. 5. Dog control. The Covenants, Section XIII of the P.U.D. Application, will prohibit the keeping of dogs in multi -family apartment development. • • VIII. GRADING AND DRAINAGE 4.02.04 A. Grading 4.02.04 1. See Map 1-7 Preliminary Grading Plan 2. Street Profile 4.02.04,c. a. The site fronts on County Road 114, known as College Road. No dedicated streets are required. 3. Cross-sections 4.02.04,a & b. a. One limited portion of the property contains slopes in excess of 20% undisturbed ground surface slope. This section is tree covered and is to remain undisturbed during and after development. Proposed buildings and interior driveways are to be located so as to conform with the existing topography as much as possi- ble. No potentially difficult grade relation- ships are anticipated. B. Drainage 4.02.04,d. 1. See Exhibit 2 - Scarrow & Walker Preliminary Drainage Report 2. See Map 1-8 Preliminary Drainage Plan IX. UTILITIES 4.02.05 A. Water Supply 4.02.05,a. 1. See Map 1-9 Schematic Utility Layout Map 2. Source 4.02.05,a.1) .a) , b) , c) , d) & 5)- a. ).a. See Exhibit 3 - Wright Water Engineers letter dated October 5, 1978 b. See Exhibit 4 - Loyal E. Leavenworth letter dated October 6, 1978 3. Potability Statement 4.02.05,a.1),e). a. See Exhibit 5 - Wright Water Engineers letter dated March 14, 1979 - 6 - • • 4. Legal Entity 4.02.05,a),2). The central water system, serving all 568 dwell- ing units of the P.U.D. including Filing One, will be owned and operated initially by the de- velopers and present owners of Los Amigos Ranch with eventual ownership and operation by either the Homeowners Association as defined in the P.U.D. Covenants, a water district consisting of users within the area served or a metropoli- tan district. B. Sanitary Sewer Disposal 4.02.05,b. 1. See Map 1-9 Schematic Utility Layout Map 2. Central Sanitary Sewage System 4.02.05,b,1).a), b) and c) . All of the 96 apartment units of Filing One will be served by central sewage treatment. It is proposed, in negotiation and under State review that the existing sewage facilities at C.M.C. be utilized. A contractual agreement covering sys- tem improvements and service to handle the 96 apartment units of Filing One as well as a draft service plan for an eventual sanitation district are currently being prepared and reviewed by the entities involved. See Exhibit 3 - letter from Colorado Mountain College. C. Underground Wiring 4.02.05,c. 1. See Map 1-9 Schematic Utility Layout Map 2. See Exhibit 6 - Holy Cross Electric Association letter dated March 13, 1979 3. See Exhibit 7 - Mountain Bell letter dated March 14, 1979 • 1 Lincoln DeVore 1000 West Fillmore St. Colorado Springs, Colorado 80907 (303) 632-3593 Home Office Mr. Dean Moffatt Sundesigns 13151/2 Grand :venue wGlenwood Springs, CO 31601 September 14, 1973 Re: File No. GS -740 Preliminary Geologic Hazards Investigation for Los Amigos Ranch P.U.D. Garfield County, Colora.do Dear Mr. Moffatt: Personnel of Lincoln-De-Vore completed a preliminary geologic hazard site -nspection on the above referenced property on September 5, 1978, in order to identify and define i:'le L,cologic and sc .l6 co:s r :i;.ts wlaeh may effect the proposed P.U.D. A set of maps were prepared in connection with this report which were based on a regional study done by Lincoln-DeVore for Garfield County in 1975 under the provisions of Colorado House Bill 1041. These maps have been amended and added to, but must still be considered as preliminary in nature. Geologically the site could be described as an upland mesa, formed by basalt flows (Tb) (see Plate I) which were extruded during the down cutting of the Roaring Fork Valley. These flows covered the Maroon formation (IP Pm) (see Plate I), a thick sequence of red interbedded sandstones, siltstones, and shales which can be seen outcropping along the southwestern edge of the site. The basalt flows also partially covered the Eagle Valley Evcporite (Pev) in the southern portion of the site. The Eagle Valley ::vaporite locally consists of white to grey gypsum with widely spaced fine grained sandstones and dark grey shales. The following discussion of the engineering considerations of these three formations is general in nature. The Eagle Valley Evaporite (Pev) has undergone several types of deformation which has resulted in a typical chaotic internal structure. The contortion and deformation of the incompetent materials of this formation dictates that wherever it is exposed it must be considered as potentially unstable. Other hazards associated with this formation include potential solution, hydrocom- paction and the presence of corrosive minerals. The Maroon formation (1P Pm) is highly fractured and, therefore, easily eroded which provides an excellent source of material for rockfall and debris flows 2700 Highway 50 West Pueblo, Colo 81003 (303) 546-1150 P.O. Box 1427 Glenwood Springs, Colo 81601 (303) 945-6020 109 Rosemont Plaza Montrose, Colo 81401 (303)249.7838 EXHIBIT 1 P.O. Box 1882 Grand Junction, Colo 81501 (303) 242-8968 P.O. Box 1643 Rock Springs,. Wyo 82901 (307) 382-2649 • • Mr. Dean Moffatt September 14, 1978 Page -2- when exposed on steep slopes. These hazards are only present along the steep valley sides on the west and southwest boundary of the site. Soils derived from the Maroon formation may be susceptible to potential subsi- dence and hydrocompaction. The basalt flows (Tb), which underlie the majority of the site, are dark grey, highly fractured, and vesicular basalts attaining several hundred feet in thickness. The major hazard associated with the basalt is rockfall which is present on the steeper slopes below the cliff -like palisades along the Roaring Fork Valley in the west and southwest edges of the site, and along the outcrops near the eastern boundary. Another large rockfall area " is present in the south central portion of the site just north of the Colorado Mountain College access road._ Another slope stability problem in the presence of a moderate sized land- slide (Q -s) was noted at the base of the palisade between the two major drainage gullies just north of where they intersect. This slide appears fairly old and moderately stable but, without specific analysis, should be considered potentially unstable. The palisades which occur throughout the proposed development area should be considered as potentially unstable and a minimum setback from the edges for buildings should be established prior to construction. The basalt bedrock appears to outcrop or be present at a shallow depth throughout the majority of the site and wherever it is encountered close to the surface will affect both construction and excavation and may require blasting for removal. The shallow bedrock is highly fractured and permeable, which will affect the potential for individual septic systems and may necessitate the use of a central septic system. Surficial deposits mapped as colluvium (Qc) have potential hazards which are dependent on the formations from which they are derived and their modes of deposition. Colluvium, derived from the Maroon formation, is mainly gravity transported and will be susceptible to potential subsidence due to hydrocompaction only, whereas colluvium derived from the Eagle ','Wiley 4vaporite ::i11 ba s•useapti;,le ..o so�� : ia._, i 'rocc,r, •Z�i__o Lnd the presence of corrosive minerals. Alluvial deposits mapped as terraces (Qt1_,) consist mainly of well rounded sands and gravels and have no inherent hazards e.::cept where they overlie incompetent members of the Eagle Valley Evaporite, which could cause them to be potentially unstable. Sands and gravels also make up the deposit which surrounds the Roaring Fork River labeled (Qal). The alluvial deposit mapped as (Qal) in the eastern part of the site, however, consists mainly of sand, silt and clay deposited by stream action. Expansive clays and/or consoli- dating silts may be encountered in this eastern alluvial area. Another geologic feature mapped as an alluvial fan (cif) was noted just south of the site but will not affect the proposed development. Two major gullies and several minor ones were inspected to determine their potential for flooding anu.ebris flows. The evidence indicates that signifi- • • Mr. Dean Moffatt September. 14, 1978 Page -3- cant stream flow in most of the gullies will exist only durinL, and after torrential rains. The upper part of the drainage basins are fairly flat, cultivated, and cross the highly fractured and permeable basalt flows which tends to reduce runoff to a level far below that which would normally be expected, however, the potential for flooding within the gullies does exist and has been mapped as floodways (fw ) (see Plate III). The lower part of the drainages become fairly steep and contain considerable quantities of debris. Close inspection of these gullies revealed no recent debris flow activity, and actually very little potential for debris flows. .is all the areas of proposed development are located on the uplands, the flood hazard to those areas is almost nonexistent. There is a potential for hazards to exist for any roads and dams placed in the area of the gullies; these must be designed for the relevant peak flows and channel configura- tions. In conclusion, there do not appear to be any severe conflicts between the proposed use and the geologic engineering constraints. Site specific studies are recommended in areas of geologic hazards, at which time specific mitiga- tion procedures can be outlined. If there are any questions or if we can be of further service, please feel free to contact the Laboratory at any time. Respectfully submitted, LINCOLN-DeVORE TESTING L:d?. /4j Michael T. Weaver Engineering Geologist /fin .Y1* 1 ..C�� Ltvk Reviewed by Kenneth L. J> ers, Professional Engineer MT'1/sko 421 . ow. & .`WNL • B_7 N • A 1.. • �sLhin t EnQlneer • Laud Surveyors 204 8th St. • Glenwood Springs, Colo. 81601 • 303-945-8664 144 West 4th St. • Rifle, Colo. 81650 • 303.625.2740 March 19, 1979 • LOS AMIGOS RANCH Lot 1, Block 1 Drainage Study Location and Description: Los Amigos Ranch is located at the Southeast edge of the Spring Valley basin about 3 miles Southeast of Glenwood Springs at elevation 6,850. Vegetative cover is predomi- nantly sage and juniper and soils are fairly impervious basalt. The proposed apartment development will be arranged in 4 units with adjacent paved parking areas as indicated in Exhibit "A". Because more precise parking lot and building details are not available it was assumed that each parking lot contained 32 spaces and measured 65' by 160'. A paved road 1500 feet in length connects the 6 lots. Building coverage was assumed to be 10,800 square feet for each of the 4 buildings. Based on these assump- tions the historic and developed runoff was calculated to assess any detrimental effects due to runoff. Drainage Design Criteria: Because the site is fairly small (17 acres) the Rational Method (Q = ciA) was selected where Q is the generated runoff, c is the runoff coefficient based on ground cover and soils characteristics, i is the rainfall intensity for the 100 year design storm and A is the drainage area in acres. A. Historic condition: Q = ciA c = 0.4 1100 = 3" SCS isopluvial map A = 17 acres Therefore the historic Q = 0.4 x 3 x 17 = 20.4 cfs. Robert A. Wamsley Gary S. Berschauer Dennis 0 Bradley LeRoy E. Tobler Martin S. Oldford Raymond 1. Baldwin Robert D. Scarrow — Special Consultant is,x#iBsrZ. 7456 West 5th Ave. Denver, Colo. 80226 303;232.6050 Los Amigos Ranch,11110Dt 1, Block 1 Drainage Study Page Two B. Developed condition: March 19, 1979 Q = ciA cl = 0.9 improved areas c2 = 0.4 natural areas dev. Q = 0.9 x 3 x 1.9 + i = 3" 0.4 x 3 x 15.1 = Al = road + lots + buildings 23.2 cfs = 1500' x 20' + 65 x 160 + 4 x 10,800 = 1.9 acres A2 = 15.1 acres Therefore, the increased runoff due to development will be 2.8 cfs which can be detained on site or routed through the future commercial area to the south in a controlled rate of release. Floodplain: The student apartment site is situated on a knoll about 30' to 50' above the natural drainage swale to the west and will be outside any floodway which might exist due to the basin runoff from the north. It has been suggested in a previous study by Wright Water Engineers that the upstream basin acts as an underground reservoir which would minimize possible rapid runoff. Drainage Improvements: Culverts should be placed at appropriate locations along the connecting road to allow runoff to drain westerly to the Roaring Fork River. Ponding onsite is permitted in the open areas downstream from building locations. The area which drains to the county road bordering the south property line is about 5 acres and will require an 18" diameter culvert placed under the entrance road to the development. Ditch grading should be performed to channel runoff away from the paved county road. Summary: The location and siting of the proposed student apartment buildings will present no problem relative to flooding or generated runoff. The developed runoff will be fairly negligible and can be detained on site or routed through the commercial area. Because the site plan is still in process exact locations and sizes of drainage culverts are not possible to determine. The final site plan should be studied and improvements to drainage made at that time. SCARROW & WALKER / K.K.B.N.A., Inc. 411 Los Amigos Ranch, Lot 1,Block 1 1 Drainage Study Page Three Summary (Cont.) March 19, 1979 An 18" culvert should be placed along the north edge of the county road and below the entrance road and ditch grading performed to prevent flooding and possible pavement damage. Martin S. Oldford, P.E. SCARROW & WALKER / K.K.B.N.A., Inc. ASPEN OFFICE P.0 BOX 8028 ASPEN. COLORADO 81611 GLENWOOD SPRINGS OFFICE P.0 BOX 1286 GLENWOOD SPRINGS. COLORADO 81601 STEAMBOAT OFFICE P 0 BOX 5220 STEAMBOAT VILLAGE. COLORADO 80499 SANTO DOMINGO OFFICE WRIGHT-MENA WATER ENGINEERS KM 9i: ANTIGUA CORRETERA DUARTE SANTO DOMINGO. DOMINICAN REPUBLIC Robert Chatmas P.O. Box 2218 Aspen, CO 81611 Dear Rob: • • WRIGHT WATER ENGINEERS, INC. ENGINEERING CONSULTANTS 2420 ALCOTT STREET DENVER. COLORADO 00211 1 3021 •54.6201 Glenwood Springs Tel. 945-7755 October 5, 1978 RE: Los Amigos Development Water Supply KENNETH R WRIGHT WILLIAM L. LORAN RUSSELL E DARR F. ROBERT McGREGOR RALPH L. TOREN ROBERT D. TAFELSKI This letter summarizes our preliminary findings and conclusions concerning the water supply for the proposed Los Amigos Planned Unit Development located southeast of Glenwood Springs in Garfield County. Development parameters, such as type, location and number of units, have been provided by Sundesigns. We have also been working closely with Loyal Leavenworth, the water attorney for the project. WATER REQUIREMENTS For planning purposes a central water supply system is proposed to serve the entire development, except for a few large lot parcels in the northern portion of the P.U.D. Table 1 presents the estimated ultimate water requirements for the development. The inhouse use was based on a per capita use of 100 gallons per day assuming year around full occupancy. Irrigation demands from the central water supply were based on the assumption that a total of 40 acres of land within the P.U.D. will be irrigated. This is equivalent to about 3,000 square feet of irrigated land (lawn, green belt, open space, etc.) for the 567 equivalent residential units. In addition to inhouse and irrigation usage, it is assumed there will be 70 head of livestock (horses) that will require an average of 25 gallons of water per head per day. Total maximum diversion from the central water supply system is estimated to be 285 acre feet per year. Winter time water requirements EXHIBIT 3 Robert Chatmas October 5, 1978 • 1 TABLE 1 ULTIMATE WATER SUPPLY REQUIREMENTS INHOUSE DOMESTIC USE Type of Unit -2- Total Number People Number Daily Annual of Dwelling per of Use Use Units Units Unit People gpd•`• Acre Feet Single Family 122 122 3.5 427 42,700 Duplex 31 62 3.5 217 21,700 Fourplex 15 60 3.0 180 18,000 Multiplex 30 324 2.5 810 81,000 TOTALS 198 568 (2.9) 1634 163,400 183 AF IRRIGATION (Assume 3,000 ft. 2 per dwelling unit) 40 acres x 2.5 AF per acre 100 AF LIVESTOCK USE 70 head @ 25 gallons per head per day 2 AF TOTAL ANNUAL DIVERSION 285 AF WINTER DAY BASE DIVERSION = .16 MGD = 113 gpm = 0.25 cfs MAXIMUM DAY SUMMER DIVERSION-` = .71 MGD = 490 gpm = 1.1 cfs 100 gallons per capita per day. ** 1/2 inch irrigation on 40 acres plus average daily inhouse use. Fire flow not included. Robert Chatmas -3- October 5, 1978 are estimated to be 113 gpm (0.25 cfs). Maximum day summer demand for domestic, livestock and irrigation is estimated to be 490 gpm (1.1 cfs). Treated water storage requirements, which will be governed mainly by fire flow requirements for the multi unit buildings, are estimated to be as high as 250,000 gallons. WATER SUPPLY At this time we recommend that the water supply for the entire develop- ment, except for a few of the larger tracts in the western area, be provided by a central system that derives its water from a series of wells located along the eastern edge of the P.U.D. These wells would be drilled into the Spring Valley alluvium to depths of up to 300 feet. It is our opinion that properly constructed wells can be drilled into this aquifer that will produce 200 to 400 gpm. Under ultimate development we recommend that at least two 300 gpm wells, or an equivalent combination, be drilled. The water from the wells will be chlorinated and pumped to a main storage tank that would be located approximately at the 7200 foot level in the southeast portion of the project. WATER RIGHTS Presently, Los Amigos has one decreed water right to divert water from the Spring Valley aquifer for municipal, commercial and domestic use. This water rights is for 300 gpm with an appropriation date of August 22, 1963 and an adjudication date of December 31, 1973. There are seven senior decreed water rights that can divert water from the Spring Valley aquifer. These rights are listed in Table 2. There are other water rights in the Spring Valley area senior to the 1963 Los Amigos well. However these rights do not depend upon the Spring Valley aquifer for their physical water supplyI)For example: the water rights on Landis Creek, and springs such as the Quigley and Cox Springs, obtain their water supply at elevations higher than the Spring Valley aquifer. Pumping from the Spring Valley aquifer would not effect the flow of the springs or surface rights located at an elevation higher than the Spring Valley aquifer. (1) See Map, Spring Valley Water Resources and Water Rights, Wright Water Engineers, May, 1977. Robert Chatmas October 5, 1978 STR -4- TABLE 2 SPRING VALLEY AQUIFER WATER RIGHTS CASE AMOUNT APPROPRIATION ADJUDICATION UCTURE OWNER NUMBER (cfs) DATE DATE Well CMC W-403 .9 5-8-1967 12-31-1972 Well CMC W-404 .9 5-16-1967 12-31-1972 Well CMC W-405 .09 3-31-1967 12-31-1972 Well #4 CMC W-406 .22 3-01-1967 12-31-1972 1 3 Ould W-1433 .001 4-30-1925 12-31-1973 1 1 Ould W-1433 .001 4-30-1930 12-31-1973 1 2 Ould W-1433 .033 4-30-1945 12-31-1973 CMC CMC CMC CMC Wel Wel Wel Los Wel Spr Wel Spr Wel Lak Wel Lak Wel Spr Wel Spr Wel Lo! Wel Amigos 1 #5 Sunlight W-2156 .67 8-22-1963 12-31-1973 ing Valley 1 No 1 Beattie W-3298 .67 12-07-76 ing Valley 1 No 2 Beattie W-3549 .03 1941 e Sp Rn Foster 1 A Petroleum W-3573 .45 9-9-1977 e Sp Rn Foster 1 B Petroleum W-3574 .45 9-9-1977 ing Valley 1 No 3 Beattie W-3702 .09 1978 ing Valley 1 No 4 Beattie W-3745 .06 4-17-1978 Amigos Los 1 No 6 Amigos W-3873 .67 1978 • . Robert Chatmas October 5, 1978 -5- If all of the Spring Valley aquifer water rights senior to the 1963 Los Amigos water right diverted their full decreed amounts 24 hours a day year round, they would theoretically divert approximately 1600 acre feet per year. It is our opinion that the actual depletion to the Spring Valley aquifer because of senior water right diversions has more realistically been about 100 acre feet per year. (The primary user of the aquifer water is Colorado Mountain College. The college normally diverts less than 50,000 gallons per day (35 gpm) during the winter.) Total annual water available from the Spring Valley aquifer is estimated to be 1500 acre feet per year. (1) We conclude that the Los Amigos 1963 right will be able to physically divert and consumptively use its fully decreed 300 gpm at all times without injuring any other vested water right in the Spring Valley area. This will be true even if the CMC wells greatly expand their pumping. If the Los Amigos well was pumped at its 300 gpm decreed amount for a year there would be 483 acre feet diverted, or about 70% more water than required for the ultimate development needs on an annual basis. This right alone should be sufficient to cover the water needs of the development except during the high use irrigation season, when the 300 gpm must be supplemented to meet peak water demands caused mainly by irrigation. All inhouse require- ments are only a fraction of the water available from the 1963 right. Los Amigos has recently applied for additional water rights out of the Spring Valley aquifer to meet their ultimate water requirements. Water rights junior to Los Amigos' 1963 right and senior to their 1978 water rights are also listed in Table 2. Total depletions to the Spring Valley aquifer from the existing decreed water rights senior to the new Los Amigos 1978 water right we estimate to be currently less than 150 acre feet annually. Future maximum depletions from (1) See Spring Valley Report, copy attached. Robert Chatmas October 5, 1978 -6- all rights senior and including 1978 are estimated to be less than 1000 acre feet. Again, we conclude that there is enough physical water avail- able to satisfy all rights senior to and including 1978 Los Amigos right. We believe that the Los Amigos 1978 right can be diverted at all times and not injure any other senior water right in the Spring Valley area. The proposed Los Amigos' central water supply system could deplete the Spring Valley aquifer up to 285 acre feet per year. Wright Water Engineers believes the recharge to the Spring Valley aquifer currently is greater than all of the depletions from water rights decreed to date plus the proposed Los Amigos depletions. The effect of any new depletion caused by the Los Amigos development will, in our opinion, be felt in reduced springtime flows down Red Canyon. This effect will be felt by the Roaring Fork and Colorado Rivers during the early spring snow melt period. At the present time the Roaring Fork and Colorado are "free rivers" in the spring- time and any reduction by Los Amigos would not injure any rights currently diverting on the Roaring Fork or Colorado Rivers. However, if there were extensive development of conditional water rights on the Colorado River, there could be a "call" on 1963 and 1978 Los Amigos water rights, as well as all other Spring Valley aquifer water rights. If that ever occured, we believe Los Amigos "injury" to the Roaring Fork and Colorado Rivers could be mitigated by providing augmentation water at that time by releases from reservoirs tributary to the Colorado River above Rifle, or by securing other suitable augmentation water. The only potential for "injury" to water rights in the Spring Valley area would be the lowering of the water table to a point where other wells would have to pump from a greater depth. Injury, if any, would be limited to additional energy costs for pumping - which we believe would be very little. We believe that it would be impossible to "dry up" any of the Spring Valley aquifer wells. Robert Chatmas October 5, 1978 -7- SUMMARY In summary we believe that a viable water supply can be developed for the proposed Los Amigos P.U.D. from wells drilled into the Spring Valley aquifer. Water requirements for the development will be as high as 285 acre feet per year with a maximum daily requirement of about 1.1 cfs. We believe that the proposed diversions by the Los Amigos 1963 and 1978 water rights will not injure any vested water rights in the Spring Valley area. In the future there is a possibility of injury to senior water rights on the Colorado River. As that time approaches, we believe Los Amigos can develop appropriate augmentation water to mitigate injury, if any. Please do not hesitate to call if you have any questions. Very truly yours, WRIGHT WATER ENGINEERS, INC. BY V _i fvi»'7 William L. Lorah WLL:ep cc: Dean Moffatt Lee Leavenworth 781-67 JOHN D. MUSICK, JR. STEPHEN T. WILLIAMSON ALAN E. SCHWARTZ LOYAL E LEAVENWORTH JOSEPH A COPE SUE ELLEN HARRISON WILLIAM T SMITH, JR. KEVIN L PATRICK MC_.CK, WILLIAMSON, SCHWART. LEAVENWORTH & COPE, P.C. AT F ORNEYS AT LAW 75 MANHAI LAN DRIVE - SUITE I P O. BOX 4579 BOULDER. COLORADO 80306 TELEPHONE (303) 4993990 (COLO) I -800 332.2 (40 October 6, 1978 Glenwood Springs Mr. Robert A. Witkowski, Director Garfield County Planning Department 2014 Blake Avenue Glenwood Springs, CO 81601 Re: Los Amigos Ranch Water Rights Dear Bob: Our firm retained for Wright Water proposed Los GLENWOOD SPRINGS OFFICE 1011 GRAND AVENUE GLENWOOD SPRINGS, CO 81601 TELEPHONE (303) 945 8513 represents Mr. Robert W. Chatmas, We were the purpose of developing, in conjunction with Engineers, Inc., a legal water supply for the Amigos Ranch development, We have worked closely with Wright Water Engineers in the preparation of the Water Resource Investiaation., dated October 5, 1978, which appears as Exhibit 1 to this application for rezoning. We concur in the analysis and. conclusions set forth in the Water Resource Investigation. WATER RIGHTS A. Los Amigos Well No. 5 The Los Amigos Ranch owns the 1963 Los Amigos Well No. 5 water right. This water right was decreed on July 23, 1974, in Case No. W-2156, Water Division No. 5 (copy of decree attached) for 300 q.p,m. (0.66 c.f.s.) for municipal, commercial, domestic, and industrial use with a date of appropriation of August 22, 1963. This water right will be utilized in the Los Amigos water supply system as outlined in the Wright Water Engineers report of October 5, 1978. It is my opinion no action in the Water Court will be necessary in order to use the Los Amigos Well No. 5 as set forth therein. EXHIBIT 4 • • Mr. Robert A. Witkowski, Director October 6, 1978 Page 2 B. Los Amigos Well No. 6 On August 31, 1978, an Application for Underground Water Rights for the Los Amigos Well No. 6 was filed with the Water Court as Case No. W-3873, Water Division No. 5 (a copy of this Application is attached). This Application seeks a decree for 300 g.p.m. (0.66 c.f.s.) for all municipal uses, including without limitation, irrigation, domestic, manufacturing, commercial, industrial, mechanical, fire protection, power generation, fish and wildlife propagation, recreational, aesthetic; exchange, replacement, or augmentation; storage for system balance and adjustment in connection with any and all uses proposed herein with a date of appropriation of July 27, 1978. The time for filing opposition to this Application will expire on October 31, 1978. To date, no opposition has been filed. The Wright Water Engineers' report of October 5 raised three points relative to the development of a legal water supply which require additional discussion: 1. The effect of an increase in depletions to the Spring Valley aquifer by aquifer water rights senior to the Los Amigos water rights. See discussion at page 5, Wright Water Engineers' report of October 5, 1978. 2. The effect of a potential lowering of the water table. See discussion at paragraph 3, page 6, Wright Water Engineers' report of October 5, 1978. 3. A possible need for augmentation in the future due to reduced runoff flows down Red Canyon. See discussion at paragraph 1 and 2, page 6, which report of October 5, 1978. Based on the technical data set forth in Mr. Lorah's reports, it is our judgment that these potential concerns do not diminish the legal basis of the proposed water supply. First, although some increase in aquifer depletions by senior rights may occur, an increase in actual depletions in an amount that would diminish Los Amigos diversions (e.g., an increase from 100 acre-feet per year to over 1,215 acre-feet per year) would constitute an unlawful enlargement of use by senior rights, not permitted Mr. Robert A. Witkowski, Director October 6, 1978 Page 3 under Colorado water law. Secondly, Colorado water law permits the lowering of the ground water table so lona as the decline in the water table does not place the water supply of other reasonable water users beyond their economic reach, to the extent of their historic use. In our judgment, the Wright Water Engineers' conclusion that additional pumping costs, if any, would be deminimus demonstrates that any lowering of the water table will be within the economic reach of other water users. Therefore, this point should not prevent Los Amigos diversions from the aquifer. Finally, in the event augmentation is required in the future, augmentation water could be secured from Ruedi Reservoir, Green Mountain Reservoir or other sources of supply. Existing court opinions confirm that water may be used for this purpose without additional court approval. In conclusion, the two water rights (Los Amigos Wells Nos. 5 and 6) will provide the basis for the legal right to divert water from the Spring Valley aquifer for use in the proposed Los Amigos Ranch water system. Based upon the data and information contained in the Spring Valley Report and the Wright Water Engineers report of October 5, it is our judgment that, upon receiving a decree for Los Amigos Well No. 6, no additional Water Court proceedings will be required to secure the water rights necessary for implementation of the proposed water system for the Los Amigos Ranch P.U.D. If you or the Planning Commission have any questions or desire additional information, feel free to call. Very truly yours, MUSICK, WILLIAMSON, SCHWARTZ, LEAVENWORTH & COPE, P.C. By LEL/j Enc. cc: Mr. William L. Lorah (w/enc.) Mr. Robert Chatmas (w/enc.) Mr. Dean K. Moffatt (w/enc..) ASPEN OFFICE P.O. BOX 8028 ASPEN, COLORADO 81611 CHEYENNE OFFICE 3228 LOCUST DRIVE CHEYENNE, WYOMING 82001 GLENWOOD SPRINGS OFFICE P.O. BOX 1286 GLENWOOD SPRINGS, COLORADO 81601 STEAMBOAT OFFICE P.O. BOX 5220 STEAMBOAT VILLAGE, COLORADO 80499 WRIGHT WATER ENGINEERS, INC. ENGINEERING CONSULTANTS 2420 ALCOTT STREET DENVER, COLORADO 80211 (303) 458-6201 Glenwood Springs Tel. 945-7755 March 14, 1979 Dean Moffat -Sun Designs 13151 Grand Ave. Glenwood Springs, CO 81601 RE: Los Amigos Water Supply Dear Dean: KENNETH R. WRIGHT WILLIAM L. TORAH RUSSELL E. DARR RICHARD D. JOHNSON J. CRAIG GREEN H. RAY NEWMYER MARILYN M. STOKES RALPH L. TOREN FRANK J. TRELEASE The potable water supply for the first phase of the Los Amigos development will come from the existing Los Amigos Well #5 and possibly from a new well that would be drilled into the Spring Valley alluvium north of Well #5. We have no reason to believe that water from these wells will not be of an acceptable water quality. The water will come from the same aquifer from which the CMC wells take their water. The qaulity of water from the Los Amigos wells should be similar to the quality of the CMC wells. WLL:ep 781-67 Very truly yours, WRIGHT WATER ENGINEERS, INC. By 144�_ William L. Lorah EXHIBIT 5 • • HOLY CROSS ELECTRIC ASSOCIATION, INCE. AREA COD 1301 GRAND AVENUE 303 P. O. DRAWER 250 945 - 5491 GLENWOOI) SPRINGS, COLORADO 81601 945 - 6056 March 13, 1979 Mr. Richard Dart Moffatt Associates 1315-1/2 Grand Avenue Glenwood Springs, CO 81601 RE: Los Amigos Ranch, Garfield County Dear Mr. Dart: The above mentioned development is within the certificated service area of Holy Cross Electric Association, Inc. Holy Cross Electric Association, Inc. has an existing substation near Basalt, Colorado, capable of providing the necessary power for Filing 1 of the development, subject to the tariffs, rules and regulations on file with the Public Utilities Commission of the State of Colorado, and to appropriate contractual agreements with Holy Cross Electric Association, Inc. At this time, Holy Cross Electric does not have distribution facilities to the subject area capable of providing more than a small portion of the electric load anticipated for the whole development. Holy Cross Electric and Colorado -Ute Electric Association are presently involved in the planning of a new Carbondale substation, which when built, will provide sufficient power to the total proposed development. Holy Cross Electric will alter, enlarge, and/or extend the existing distribution lines to the required locations, subject to its Line Extension Policy on file with the Public Utilities Commission of the State of Colorado. Please contact me if you have any further questions. Sincerely, HOLY CROSS ELECTRIC SOCIATION, INC. Je ey A. Franke Engineering Technician JAF:1sz cc:79-7729:Los Amigos Ranch EXHIBIT 6 • • Mountain Bell 1429 Grand Av Glenwood Springs, Colorado March 14, 1979 Sundesign Architects 1315 Grand Av Glenwood Springs, Colorado 81601 Dear Sirs, This letter is to state that iiountain bell is the serving telephone company for the Glenwood Springs area and null be providing telephone colamunication services for the Los Amigo'c' Uanch development near Colorado t•iountain College. Paul G Patterson Manager EXHIBIT 7 • • LOS AMIGOS RANCH FILING NO. 1 LEGAL DESCRIPTION A parcel of land situated in the SE; of Section 5, Township 7 South, Range 88 West of the Sixth Principal Meridian, Garfield County, Colorado, lying northwesterly of the northwesterly right-of-way line of a county road known as College Road. Said parcel being more particularly described as follows: Beginning at a point, whence the South Quarter Corner of said Section 5 bears: S. 56°40' W. 666 feet, said bearing being relative to an assumed East-West bearing of the North line of said Section 5; thence northwesterly on a curve to the left, whose chord bears N. 18°50' W. 389 feet, said curve being the northeasterly right-of-way line of a proposed road; thence N. 71°10' E. 470 feet; thence N. 56°40' E. 955 feet; thence S. 25°30' E. 518 feet to a point on the northwesterly right- of-way line of said county road known as College Road as con- structed and in place; thence southwesterly on a curve to the left, whose chord bears S. 49°50' W. 420 feet, said curve being the northwesterly right-of-way line of said county road; thence southwesterly on a tangent that bears S. 30°40' W. 140 feet, said tangent being the northwesterly right-of-way line of said county road; thence N. 77°10' W. 264 feet; thence S. 71°10' W. 728 feet to the True Point of Beginning. Said parcel containing 15.1 acres more or less. EXHIBIT 9 • • ASPEN OFFICE F G 60X 8028 ASPEN. COLORADO 81611 CHEYENNE OFFICE 3228 LOCUST DRIVE CHEYENNE, WYOMING 82001 GLENWOOD SPRINGS OFFICE PO. BOX 1286 GLENWOOD SPRINGS, COLORADO 81601 STEAMBOAT OFFICE P.O BOX 3220 5TEAJABOA1 VILLAGE, COLORADO 80.199 WRIGHT WATER ENGINEERS, INC. ENGINEERING CONSULTANTS 2420 ALCOTT STREET DENVER, COLORADO 80211 (303) 458-6201 Glenwood Springs Tel. 945-7755 Mr. Rodney Anderson Vice President, West Campus Colorado Mountain College Glenwood Springs, CO 81601 Dear Mr. Anderson: March 14, 1979 KENNE1H R W'RIGHT WILLIAM l LORAH RUSSELL E DARR RICHARD D JOHNSON I CRAIG GREEN 6 RAY NFWMYER MARILYN M. 5109ES RALPH L TOREN 89669 J TREIEA5E RE: Spring Valley Sanitation District The purpose of this letter is to propose modifications to the existing CMC sewage plant to provide adequate waste water treatment on a short term basis for the immediate needs of CMC, Los Amigos and Lake Springs Ranch. In addition, it is proposed that the three entities develop a plan of action to create a Spring Valley Sanitation District (or other entity) to meet the ultimate waste water treatment needs of the area. CMC's waste water treatment plant needs some modifications at the present time to meet State requirements. Los Amigos and Lake Springs Ranch, proposed housing developments adjacent to CMC, desire to provide central sewage collection and treatment facilities. Since the State Health Department will encourage (eventually probably force) the two developments to join CMC in a common waste water treatment facility, it is proposed that the three entities work to develop a long range solution to the area's sewage needs. These needs will most likely be met with one treatment facility. That facility can be operated by CMC, or it can be operated by a Sanitation District or other entity. At this time Wright Water Engineers believes that the existing CMC facilities can be modified to accommodate the immediate (1980) needs of CMC, Los Amigos and Lake Springs Ranch. We believe the long term solution to the area's needs will require major improvements in the present facilities to meet the 1985 EPA standards. Wright Water Engineers is in the process of developing a phased service plan for sewer services for the southern portion of Spring Valley. This service plan can be used to establish a Sanitation District. We are trying to complete a preliminary draft of a service plan in the next week so it can be presented to the CMC Board of Directors at their March meeting. Since the formation of a district will require careful consideration and much time by all parties, it is proposed that a temporary agreement be reached between the college, Los Amigos and Foster Petroleum whereby the CMC facilities will treat on an interim basis Los Amigos and Lake Springs Ranch sewage under the following conditions: EXHIBIT 10 Mr. Rodney Anderson -2- March 14, 1979 1. Los Amigos will not add more than 96 apartment units to the interim system. 2. Foster Petroleum will not add more than 20 single family units to the interim system. 3. Los Amigos and Foster Petroleum will develop plans to modify the CMC plant to adequately handle CMC's existing needs and their own short term needs. 4. Los Amigos and Foster Petroleum will obtain State approval for such modifications for the interim. 5. All 3 parties will diligently work toward a mutually agreeable long term plan to meet the area's waste water treatment needs. If Los Amigos and Foster Petroleum are to commit to provide housing in the fall of 1979, we believe a written agreement must be reached in the near future. This agreement would incorporate the items mentioned above. Please don't hesitate to contact us if you have any questions. Very truly yours, WRIGHT WATER ENGINEERS, INC. By W/&/ William L. Lorah WLL:ep cc: Rob Chatmas Duncan Sinnock 781-67 caoRA MJ\ CO L • 1 rA WEST CAMPUS-GLENWOOD SPRINGS, COLORADO 81601 303/945-7481 March 19, 1979 Garfield County Commissioners Garfield County Court House Glenwood Springs, Co 81601 Dear Sirs: This is to advise that Colorado Mountain College and Los Amigos Ranch are continuing to cooperatively explore the possibilities of a common waste water treatment facility to serve both entities. Sincerely,Si`� Rodney D. Anderson Vice President - West Campus sg EXHI£3IT 11 t" Aak IN THE D1:;TRIC'I' cower. IN AN WATER D.1 Vi:.; I ONJ NO. 5 S'L'ATE OF COLORADO CASE N0. w-2156 IN THE MATTER Ol' THE APPLICATION FOR WATER RIGIPTS OF SUNLIGHT PARTNERSHIP IN TIIE ROARING FORK .RIVER OR ITS TRIBUTARIES TRIBUTARY INVOLVED: • IN GARFI ELD courlrY .• 'i .1 11 . (• I or CC:I Los Arnidos Well No. 5... RULING OF THE REFEREE ABSOLUTE 1)!X;REE FOR UNDER GROUND WATER RIGIITS And ,the Referee having made the investigations required by Article 21Lof Chapter 148, C.R.S. 1963, as amended does hereby make the following ruling, to wit: This application was referred to the Water Referee of Water Division No. 5 on the 4th day of January , YgggY 1974. 1. Narne of Applicant Sunlight Partnership ' Address Gi, 1776 S. Jackson Street; Denver, Colorado 2. The name of the structure is Los Amigos Well No. `a. 3. The Legal description of the structure is : The well is located in Lot 6, Section 5, T. 7 S., R. 88 W. of the 6th P.M. at a point whence the East Quarter Corner of said Section 5 bears N. 41007'43' E. 974.55 feet. 4. The depth of the well is 260 feet. 5. The date of initiation of appropriation is August 22, 1963. 6. The amount of water claimed is 0.66 cubic foot per second of time. 643,'% 7. The use of the water is municipal, Commercial.. domestic, industrial. 8. The State Engineers number is 18147. 9. The Priority date is August 22, 1963. 10. The date of the application was December 28, 1973. It is the ruling of the Referee that the statements in the application are true and that the above described water right is approved and granted the indicated priority; subject, however, to all earlier priority rights of others. Itis accordingly ordered that this ruling shall become effective upon filing with the Water Clerk, subject to Judicial review as provided by law. Done at the City of Glenwood Springs, Colorado this / . r day of �,v,45"i,ef_ , 1974. No protest :-as filed in th1.s matter. . The foregoing ruling is confirmed and npproved, and is made the Judgment and Decree of this court. Dated: 9,.3 /P41 <tcr Jud.:O EXHIBIT 12 ater Referee Water Division .:o. 5 State of Colorado t • 7 '...... . --N . ,., :e... FEW OF T 67/—! P/i. ,LOT 6- •cs mac. ) . . n/95'7" /4 S EC Al .. o ,9/1/GOS WELL NO. .5 MAP OF LOS AMIGOS WELL NO. 5 GARFIELD COUNTY COLORADO 'Said welt is 'situated in Lot 6 of Section 5, Township 7 South, Range 88 West of the Sixth Principal Meridian locatedat a point whence the East Quarter Corner of said Section 5 bears: N.4I°071,43" E. 974.55 feet. SCARROW AND WALKER, INC. 'Robert A. Wamsley Registered Land Surveyor • 1 i , / IJNEE