Laserfiche WebLink
<br />I <br />I <br />~ <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br /> <br />IV. <br /> <br />ADVANTAGES AND DISADVANTAGES OF AN ENLARGED RESERVOIR <br /> <br />I. Engineering, Summarized below are the physical sizes and possible <br /> <br />drawdowns of the Elkhead Creek Reservoir for different uses: <br /> <br />Reservoir as <br />planned by Divi- <br />sion of Wildlife <br /> <br />Reservoir with <br />add'l capacity <br />for four 350 Mol <br />unit operation <br /> <br />Reservoir with <br />add'l capacity <br />for two 350 MW <br />unit opera tion <br /> <br />1) Dam crest elevation (ft) 6,350 6,365 6,374 <br />2) Normal water elevation <br /> (spillway crest elev.) (ft) 6,340.5 6,355 6,364.5 <br />3) Surface area at nonnal <br /> wa ter eleva tion (acres) 262 385 440 <br />4) Total reservoir capacity at -~ G~-O) :.~V <br /> normal water elev.(acre-feet) (4,800 <br />5) Possible maximum drawdown (ft) Base 14.5 24 <br /> <br />2. Ecology. For the presently planned reservoir approximately 300 acres <br /> <br />of grassland and unimproved wasteland would be submerged, destroying <br /> <br />some habitat for smaller wildlife. However, the wildlife value is <br /> <br />very small in this area according to Wildlife Commission Officer <br /> <br />William Rowland of the Craig area and the establishment of the lake <br /> <br />should more than offset this loss by enhancing waterfowl and fish <br /> <br />production capability. This enhancement would take the form of <br /> <br />waterfowl resting and fish production area (as well as helping to <br /> <br />fulfill the request for additional recreation opportunities in the <br /> <br />Craig-Hayden area). The dam will also act as a settling area to trap <br /> <br />silt, thereby reducing downstream deposits in both Elkhead Creek and <br /> <br />the Yampa River. With silt loading factors in mind, the presently <br /> <br />planned reservoir has a life expectancy of 41 years. <br /> <br />6 <br />