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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 />Town of Parker, Douglas County, Colorado. The area of study is <br />shown on the Vicinity Map (Figure 1). <br /> <br />Flooding caused by the overflow of Cherry Creek, Sulphur Gulch, and <br />Tallman Gulch was studied using detailed methods. <br /> <br />The areas studied by detailed methods were selected based on the <br />extent and validity of available hydrologic and hydraulic data. <br /> <br />. <br /> <br />Jordan Road Tributary and Oak Gulch were studied using approximate <br />methods. <br /> <br />Approximate analyses were used to study those areas having a low <br />development potential or minimal flood hazards. <br /> <br />2.2 Community Description <br /> <br />The Town of Parker is located in northeastern Douglas County, in <br />central Colorado. <br /> <br />The population in the Parker census division increased from 3,008 <br />in 1970 to 11,234 in 1980 (Reference 3). <br /> <br />Cherry Creek, which drains an area of approximately 385 square <br />miles, flows northerly to Cherry Creek Lake in Arapahoe County. <br />The main developed areas along the 16-mile study length of Cherry <br />Creek are Franktown and Parker. The development in this area is <br />predominantly agricultural. Cherry Creek and its tributaries are <br />ephemeral streams. <br /> <br />Sulphur Gulch, with a drainage area of <br />westerly and passes immediately south of <br />through which Sulphur Gulch flows is <br />development. <br /> <br />17.1 square miles, flows <br />Parker. The entire area <br />planned for residential <br /> <br />. <br /> <br />Tallman Gulch, draining an area of approximately 6.1 square miles, <br />flows northwesterly through Douglas County. The area of study is <br />from the confluence with Sulphur Gulch upstream through <br />residentially zoned land. <br /> <br />. <br /> <br />The climate of the plains area of Douglas County is high, inland <br />continental, modified by the Rocky Mountains immediately to the <br />west and Palmer Lake Divide to the south. Precipitation is light, <br />'with an annual average of 15 to 18 inches. Totals vary <br />substantially for individual years because a large part of the <br />yearly total is from summer thunderstorms. Temperatures in the <br />area range from a high of slightly more than lOOoF to lows of <br />approximately -350F. The mean annual temperature is 470F. <br /> <br />3 <br />