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<br />2.0 AREA STUDIED <br /> <br />2.1 Scope of Study <br /> <br />This Flood Insurance Study covers the incorporated areas of the <br />city of Edgewater, Jefferson County, Colorado. The area of study <br />is shown on the Vicinity Map (Figure 1). <br /> <br />The areas studied by detailed methods were selected based on the <br />e~tent and validity of available e~isting hydrologic and hydraulic <br />data. <br /> <br />The area studied by detailed methods includes the Edgewater area <br />west of Sloans Lake. The stormwater channel, from the west side of <br />Sheridan Boulevard approximately 60q feet south of 20th Avenue <br />upstream to 20th Avenue and In$alls Street, a reach of <br />approximately 3,580 feet, was studied. Also studied by detailed <br />methods was an area located upstream of Ingalls Street and 20th <br />Avenue to 25th Avenue which is located approximately 750 feet west <br />of Pierce Street, a reach of approximately 5,100 feet. This area <br />is made up of primarily irregular and poorly defined channels. <br /> <br />North of the detailed study area, approximate methods of analysis <br />were used to study another sub-basin ,adjacent to Sloans Lake with <br />the resulting floodplain for this ar~a being not as well defined <br />because of the poorly defined channels in the areas of street and <br />overland flow upstream of Depew Street (Reference 2). <br /> <br />2.2 Community Description <br /> <br />The City of Edgewater is located on gently rolling land in eastern <br />Jefferson County, Colorado, and is bordered by the City of Wheat <br />Ridge to the north, the City of Lakewood to the west and south, and <br />the City and County of Denver to the east. Edgewater is <br />immediately west of Sloans Lake, a par~ in the City of Denver. <br /> <br />The City of Edgewater is fully develQped with the exception of a <br />few areas of vacant land. According to the U.S. Bureau of Census, <br />the population of Edgewater increased from 4,910 in 1970 to 5,714 <br />in 1980 (Reference 3). <br /> <br />Elevations in Edgewater range from approximately 5,200 feet to <br />approximately 5,500 feet. With its location in Colorado, Edgewater <br />experiences large fluctuations in temperature from summer to <br />winter, and rapid weather changes due 'to storms traveling easterly <br />through the region. The mountains to the west effectively block <br />atmospheric moisture originating in the Pacific Ocean and leave the <br />area dependent on moisture from the Gulf of Mexico, which does not <br />consistently reach the regi.on. Consequently, the region is dry <br />with low variable amounts of precipi,tation throughout the year, <br />although mean annual precipitation in the area of study is <br />approximately 16 inches. From April to October, approximately 40 <br />percent of the normal annual prec~pitation occurs as rain, <br />generally from thunderstorms. From November to March, the <br /> <br />2 <br />