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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />In the late 1800's. coal mining led to the development of several <br /> <br />small communities along the banks of Coal Creek. Those communities are: <br /> <br />Erie, Lafayette. Louisville, and Superior. The coal reserves have <br /> <br />diminished and most of the mines have been shut down. Major land use is <br /> <br />for agriculture; however, new industries and more. home seekers in the <br />. <br />Boulder-Denver metropolitan area have brought additional residents into <br /> <br />the watershed. In 1970 the total community population was about 7,200 <br />people. Demographic projections for the year 1990 show the population. <br />for the same area. to be over 52.000 people. There are no communities <br /> <br />in the Rock Creek portion of the Watershed. <br /> <br />The study area begins at the Coal Creek confluence with Boulder <br /> <br />Creek and extends upstream for a distance of 14 miles to a point about <br /> <br />0.4 mile above the town of Superior. Coal Creek flows in a northeasterly <br />direction until it enters Weld County and then flows north past the town <br />of Erie where it crosses back into Boulder County and runs into Boulder <br /> <br />Creek. Boulder Creek flows into St. Vrain Creek. a major tributary to <br /> <br />the South Platte River. These drainages are in the South Platte subregion <br />of the Missouri River Water Resources Region, as designated by the Water <br />Resources Council. <br /> <br />Rock Creek is a tributary to Coal Creek, and the study area extends <br /> <br /> <br />from its mouth upstream about 5.4 miles to the Denver-Boulder turnpike. <br /> <br /> <br />Total distance of study area on Coal Creek and Rock Creek is 19.4 miles. <br /> <br /> <br />A map showing the flood hazard study area follows Page 6. <br /> <br />- 5 - <br />