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J . 2-1 2.0 PROJECT DESCRIPTION 2.1 The Site A brief project description is herein presented to provide a better understanding of the potenti al effects of the JH-1 ("peach Queen II ) Project on the fish life of the Upper Colorado River. The project site is at river mile 188.2 on the northwest river bank, about 1 mile upstream of the 1-70 Highway bridge at Palisade, Colorado (Figure 1). The project is located at an existing dam facility originally constructed in 1909 for the Palisade and Mesa Canals. The existing dam is known locally as the Price-Stub Dam, but is listed on United States Geological Survey (USGS) topographic maps (Cameo Quad) as the Irrigation Districts Dam. 2.2 The Physical Plant Presently, an 8-foot high concrete dam extends across the Colorado River perpendicular to the flow. The dam has an abrupt vertical wall at the upstream side and a tapering, rolling face that extends about 40 feet downstream. The river normally flows over the top of the dam in a rolling spillway fashion. A retaining mortared-rock wall exists on the right bank together with the original headgates leading to a canal which parallels the river and splits about 400 feet downstream into the Palisade and Mesa Canals. The canal is presently earth-filled. The project sponsor plans to renovate the existing facility by excavating the canal from the headgates at the dam, bypassing the two canals to a power station about 1200 feet downstream of the headgates. A canal overfl ow is pl anned inmediately downstream of the dam to return excess water to the river. The powerhouse tailrace also returns water to the river. Up to 2077 cfs would be diverted into this power canal at anyone time, although the normal withdrawal would usually be less than 1461 cfs.