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<br />This stream, which drains the area below Prospect Valley Reservoir,
<br />has an average streambed slope of 37 feet per mile. Several
<br />small, intermittent stock ponds are located along this tributary.
<br />Figure 2 illustrates the drainage basins, while Figure 3 indicates
<br />the profile of the channel downstream of Prospect Valley
<br />Reservoi r.
<br />
<br />PROSPECT VALLEY RESERVOIR
<br />
<br />Prospect Valley Reservoir, located on the small left-bank
<br />tributary to Lost Creek, is formed by a concrete-lined earthen
<br />embankment approximately 1 mile long. The original dam was
<br />constructed about 1910 using horse teams and fresnos. In 1965,
<br />the upstream face of the dam was lined with concrete primarily for
<br />wave protection. In 1975, several additional improvements were
<br />completed, including work on an emergency spillway and installa-
<br />tion of a seepage drain in the toe of the dam.
<br />
<br />The reservoir is fed by several small tributaries which
<br />drain an area of 9.4 square miles, and by the Denver Hudson Canal.
<br />This canal draws from Horse Creek Reservoir located in the adja-
<br />cent basin to the west. Horse Creek Reservoir is fed by water
<br />diverted from the South Platte River for use by the Henrylyn
<br />Irrigation District. The maximum operating capacity of the,
<br />Prospect Valley Reservoir is 6,300 acre-feet, with a corresponding
<br />surface area of 480 acres and a depth of 37 feet. It is
<br />classified by the State Engineer as a moderate hazard dam.
<br />
<br />The dam is owned and managed by the Henrylyn Irrigation
<br />District. The reservoir feeds the Prospect Lateral for irrigation
<br />in the upper Prospect Valley.
<br />
<br />LORD RESERVOIR
<br />
<br />Lord Reservoir, also owned and managed by the Henrylyn
<br />Irrigation District, is located in the Channel of Lost Creek
<br />approximately 6 miles downstream of Prospect Valley Reservoir.
<br />
<br />FIG.2
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<br />
<br />2
<br />
<br />BASIN MAP
<br />
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