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<br />'... <br /> <br />. . <br />-. <br /> <br />_ . Engineering <br />Architecture <br />Planning <br />Sciences <br />Surveying <br />Photogrammelry <br /> <br />RECEIVED <br />JAN 1 11995 <br /> <br />Colorado Water <br />Conservation Board <br />GREENHORNE & O'MARA, INC. 3131 SOUTH VAUGHN WAY SUITE 426 AURORA, COlORADO 60014 PHONE 303-755-9000 FAX 303,755-2765 <br /> <br />January 10, 1995 <br /> <br />OIR <br />Sc <br />ASC <br />F <br />I <br />L <br />E <br /> <br />Mr, Bill Green <br />Colorado Water Conservation Board <br />1313 Sherman Street, Room 721 <br />Denver, CO' 80203 <br /> <br />RE: Victor NO.2 Dam Rehabilitation Project Description <br /> <br />Dear Mr, Green: <br /> <br />In response to our telephone conversation on January 9, 1995, I am writing this letter in support of <br />the Construction Fund Loan Application for the Victor Dam No, 2. The Victor Dam No, 2 is <br />located on the East Fork Creek, a live creek, which is a tributary to West Beaver Creek In 1984 the <br />City of Victor lowered the spillway of the Dam in order to comply with a storage restriction placed <br />. ,on the dam by the State Engineers Office. This lowering resulted in an estimated loss of storage of <br />about 23 acre-feet. The current capacity of the reservoir is estimated to be 180 acre-feet. The City <br />of Victor owns water rights to store 202,77 acre-feet. <br /> <br />In 1987 Greenhorne & O'Mara completed a Phase I Feasibility Study for the dam, The study <br />recommended that the dam embankment be raised 5.5 ft, and extended along the downstream face at <br />a 225H:IV slope to provide additional stability, In addition the emergency Spillway would be <br />widened to 42 feet utilizing side slopes of 2H 1 V and raised 1.5 ft. back to its original elevation of <br />10,392 to restore the dam to at least its adjudicated storage capacity (202.77 acre-feet). These <br />modifications were designed at a conceptual level for 1/2 of the Probable Maximum Flood (PMF). <br /> <br />More recently we submitted a proposal to the City of Victor to update the Feasibility Study in order <br />to bring it into compliance with the most recent CWCB guidelines, The Feasibility Study update will <br />include the following general tasks: <br /> <br />1, Determine the capacity of the reservoir in its present condition including any reduction caused <br />by sediment. <br /> <br />2, Determine the storage capacity which could be gained by increasing the spillway crest 2.5 feet <br />and 3.5 feet, respectively above the existing elevation of 10,390,5. <br /> <br />3. Conduct a preliminary study of the feasibility of increasing the dam height to accommodate the <br />increase in the spillway crest as described above and estimate the incremental construction cost <br />of this dam height increase. <br /> <br />4. Provide a construction sequence of how the recommended rehabilitation of the dam will be <br />achieved without limiting the City's ability to deliver approximately 700 gallons per minute to <br />its customers, <br /> <br />As a part of the loan application, which has already been submitted, the estimated project cost <br />developed in the Feasibility Study was updated, Based on our conversations we have updated the <br /> <br />ANNAPOLIS MD ATLANTA GA AURORA CO BALTIMORE MD DULUTH, GA FAIRFAX, VA FREDERICKSBURG, VA GREENBELT. MD <br />MANASSAS:VA MECHANICSBURG, PA ORLANDO, FL RALEIGH, NC ROCKVILLE, MD TAMPA, Fl WALDORF, MD WEST PALM BEACH, FL <br />