Laserfiche WebLink
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />INTRODUCTION <br /> <br />El khead Lake Dam is an earth embankment 90 feet hi gh wi th a crest 1 ength of <br />1140 feet at el evati on 6375, and was constructed in 1974. It is located on <br />Elkhead Creek about ten miles northeast of the City of Craig in Section 16, <br />Township 7, Range 89101, 6th P.M., Moffat County, Colorado. The dam is situated <br />in Water Division 6, Water District 44. The dam is owned by the Colorado <br />Division of Wildlife (CDOW). The current reservoir capacity at the maximum <br />normal water surface elevation 6365 is approximately 13,700 acre-feet. CDOW <br />maintains 5,390 acre-feet of that storage for recreational purposes, and the <br />remaln1ng 8,310 acre-feet is committed to the Colorado-Ute Electric <br />Association as a back-up cooling water supply for their nearby power <br />generating facilities. <br /> <br />During the Phase I inspection of the National Dam Safety Program, sponsored by <br />the Corps of Engi neers in 1979, it was found that the spi 11 way di d not have <br />the capacity to safely route the probable maximum flood (PMFl without <br />overtopping the embankme~t. Safely handling the P~F is a requirement for dams <br />with a high hazard rating such as Elkhead Lake. <br /> <br />In 1979, Norton, Underwood and Lamb Engineering Associates prepared a <br />pre 1 imi nary report on Water Systems Improvements for the Ci ty of Cra i g. The <br />report identified a need for adding approximately 5,000 acre-feet of water <br />storage to the Ci ty' s supply system. <br /> <br />A site for Estey-Simpson Reservoir was selected approximately 5.5 miles <br />upstream of Elkhead Lake Dam. The City purchased the land and obtained the <br />necessary funding to construct the project. I~ 1982, the hydrologic study, <br />spi 11 way, and dam si zi ng ana lyses were completed by Norton, Underwood and <br />Lamb, and the project was submitted to the State Engineer's Office (SEOl. <br /> <br />The project was not approved by the SEO because of the <br />spillway capacity to route the inflow design flood. <br />Reservoir Project was subsequently abandoned. <br /> <br />inadequacy of the <br />The Estey-Simpson <br /> <br />- i - <br />