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<br />Soil s <br /> <br />Coal Creek Si te <br /> <br />A soil survey was conducted in 1975 on the east half of Boulder County <br />by the Soil Conservation Service in cooperation with the Colorado <br />Agricultural Experiment Station. Soils in the vicinity of the Coal <br />Creek Dam and Reservoir are part of the Nederl and-Valmont Soil <br />Association, which is made up of nearly level to moderately steep, deep, <br />very cobbly soils on old high terraces, alluvial fans, and benches. <br /> <br />Ei ght soil types occur withi n the approximate 2gO-acre reservoi r area <br />and are summarized in table 1. <br /> <br />Table 1.--Soil types, Coal Creek Reservoir Area <br /> <br />So il type <br /> <br />Percent <br />slope <br />range <br /> <br />Percent of <br />reservoir <br />(total) <br /> <br />Suitabl e <br />for <br />cultivation <br /> <br />Niwot soil s 0-1 20.8 '10 <br />Valmont cobbly clay loam 5-25 10.6 No <br />Terrace soil s 12-25 20.8 No <br />Nunn sandy clay loam 1-3 4.5 Yes <br />McClave clay loam 0-1 11.5 Yes <br />Nederland very cobbly <br />clay loam 1-12 12.1 No <br />Nunn cl ay loam 3-5 12.1 Yes <br />Calkins sandy loam 1-3 7.6 Yes <br /> <br />Al though about one thi rd of the 1 and in the proposed reservoi r area <br />could possibly be cultivated and/or irrigated, the present land use has <br />been 1 imi ted to ran gel and. Soil s wi th crop produc ti on potenti al occur <br />in relatively small irregular shaped areas intermixed with areas of <br />rocky and gravelly soils. <br /> <br />Crescent Site <br /> <br />The Crescent Reservoir site is on South Boulder Creek, about 2-1/2 miles <br />upstream from the resort town of Eldorado Springs, Colorado, in a <br /> <br />8 <br />