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<br />. <br /> <br />2.0 AREA STUDIED <br /> <br />2.1 Scope of Study <br /> <br />This Flood Insurance Study covers the incorporated area of the <br />Town of Silver Plume, Clear Creek County, Colorado. The area of <br />study is shown on the Vicinity Map (Figure 1). <br /> <br />The portion of Upper Clear Creek within the corporate limits was <br />studied in detail as agreed to by Black & Veatch and the Federal <br />Insurance Administration. <br /> <br />Those areas studied by detailed methods were chosen with consider- <br />ation given to all proposed construc~ion and forecasted development <br />through 1982. <br /> <br />2.2 Community Description <br /> <br />Silver Plume is in central Clear Creek County, approximately 40 <br />miles west of Denver, Colorado, and 10 miles east of the Continental <br />Divide of the Rocky Mountains. <br /> <br />In 1970, the populations of Silver Plume and Clear Creek County were <br />189 and 4780, respectively (Reference 1). A steady growth is <br />expected for the city and county in the foreseeable future. <br /> <br />Clear Creek drains approximately 44 square miles of mountainous <br />watershed above Silver Plume. Watershed elevations range from <br />14,270 feet atop Gray's Peak at the Continental Divide to approxi- <br />mately 9,100 feet at Silver Plume. <br /> <br />Climatic conditions are characteristic of a high-altitude, dry- <br />continental climate. Although there are no weather records for <br />Silver Plume, 18 years of recorded temperatures at nearby Georgetown <br />indicate a record high of approximately 920F, a record low of -260F, <br />and an average annual temperature of 43.50P (Reference 2). The <br />average annual precipitation in the higher altitudes is in excess of <br />35 inches; at Georgetown, it is approximately 16.2 inches. <br /> <br />Vegatation varies throughout the Clear Creek watershed. In areas <br />above timberline there are m~ny rock outcroppings, and the steep <br />mountain slopes are practically void of vegetation. In woodland <br />areas, aspen, spruce, and pine trees predominate. <br /> <br />2 <br />