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B10- <br />discussions with residents living near the reservoir and received similar information on waterbirds in the <br />area. <br />2. Fruitgrowers Reservoir: Description <br />The Reservoir lies in the drainage of Alfalfa Run in Hart's Basin, about 3 miles north of Austin, Colorado <br />(Figure 1). The project site ranges from less than 0.25 miles to about 2 miles from the Reservoir, <br />depending on water levels, and adjacent wetlands and farm fields important for reservoir - associated <br />wildlife (Figures 2 and 3). The Reservoir was constructed by the US Bureau of Reclamation in 1938, and <br />in 1940 the Orchard Mesa Irrigation District assumed management of the Reservoir for agricultural <br />irrigation. The Reservoir covers 476 acres when full, behind an earthen rock -faced dam. It intercepts <br />spring runoff directly from Alfalfa Run and by diversion from Surface Creek and Dry Creek, and <br />provides irrigation water to about 2,700 acres of agricultural land (US Bureau of Reclamation 2013). <br />The Reservoir typically fills each spring, then gradually falls through the summer to meet irrigation <br />demands. Fall and winter water levels are usually several tens of feet below crest level at the beginning <br />of summer. Through the years the Reservoir has become an important habitat for waterbirds, including <br />several breeding species and a very large number of spring and fall migrant species (described in the next <br />section). The Reservoir has also become popular for recreation. The Reservoir is closed to water contact <br />sports including swimming, but is used occasionally for hand - powered boating. Some waterfowl hunting <br />occurs in fall, as well as fishing for carp during the spring spawning season. Birding constitutes the <br />greatest recreational use of the Reservoir, which has been described in recent publications as one of the <br />best localities in western Colorado for viewing waterbirds, especially during migrations. The Black <br />Canyon Audubon Society and other partner groups and agencies maintain a signed parking area with an <br />interpretive sign describing the sandhill crane migration. There are two access trails on the southeast <br />shore to facilitate birding, and most of the birding activity occurs on these trails or from the county roads <br />bounding the Reservoir. <br />3. Fruitgrowers Reservoir: Waterbirds and Other Wildlife <br />Shallow, nutrient rich water in the Reservoir, a variety of aquatic plant communities, and seasonally <br />exposed mudflats provide diverse and food -rich habitats that attract birds to the Reservoir. Submerged <br />plants and floating - leaved plants such as duckweed are abundant in deeper water. Shallow and seasonally <br />exposed shorelines are dominated by emergent wetland plants including bulrush and cattail. These plant <br />communities provide nesting cover and the basis for a rich food chain of plant material, seeds, aquatic <br />invertebrates, and fish (principally introduced carp). Near the upper end of the seasonally saturated zone, <br />meadows of spikerush, rushes, sedges, and saltgrass provide additional habitat diversity. Stands of tall <br />willows, cottonwood trees, tamarisk, and Russian olive occur in many places along the shoreline and the <br />causeway of North Road. These tall shrubs and trees provide many additional niches for birds including <br />nesting substrates and hunting perches for raptors. <br />The Reservoir is noted for the high diversity of bird species present, as a breeding site for species with <br />restricted breeding ranges, as an important migration stopover, and for several bird species of <br />conservation concern. From records kept by birding groups such as the Black Canyon and Grand Valley <br />Audubon Societies, at least 210 bird species have been recorded at the Reservoir. Not every species <br />