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<br />. <br /> <br />. <br /> <br />. <br /> <br />Deadhorse Creek Watershed <br />October 25, 1996 <br /> <br />Exhibit 3. <br /> <br />The water loss in the West Fork has not been pinpointed to anyone <br />place due to the lack of stations but probably occurs over the Cam- <br />brian Sawatch quartzite. This loss occurs topographically above <br />the Grizzly Creek Fault. The fault may be a water conduit, but not <br />to the east. Between stations DS 3 and DS 4 on the East Fork which <br />includes the Grizzly Creek Fault, there is a net loss of water. <br /> <br />CONCLUSIONS <br /> <br />OVerall, there is a loss of 1.68 cfs between stations 1 and 8 on <br />the East Fork. The majority of the loss occurs over the Sawatch <br />formation and is probably due to a combination of factors1 inferred <br />faulting along with internal fracturing and bedding planes in the <br />orthoquartzite. These features probably carry the surface water to <br />some depth. An arkosic-conglomerate member found at the base of <br />the orthoquartzite is the probable conduit for returning the water <br />to the surface. . <br /> <br />The nearly total loss in the West Fork of Deadhorse Creek appears <br />to occur over the same Sawatch quartzite and inferred fault, but <br />cannot be confirmed. <br /> <br />The Grizzly Creek Fault does not appear to be a factor in the gain <br />or loss of water in either fork of the Deadhorse Creek Watershed. <br /> <br />These conclusions are based on evidence obtained from other sources <br />with no opportunity to field check. Ground truthing is needed as <br />the above conclusions mav be in error. <br /> <br />Additional sampling points are needed in the West Fork and probably <br />the East Fork to more accurately understand the hydrogeology of the <br />Deadhorse Creek Watershed. The locations should be determine after <br />field checking is completed. .>'\;\ <br />.\0:.:. Gf..' <br />"",k ". "~, '0, <br />-:-\ '0 <br /> <br /> <br />4 <br />