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<br />b. From Buckley Field to Toll Gate Creek, the Sand Creek <br />flood plain is about 20 percent developed and contains about <br />2,100 acres of land. The major land use is residential develop- <br />ment. From Toll Gate Creek to the South Platte River, the flood <br />plain along Sand Creek is about 22 percent developed and contains <br />about 3,300 acres of land. The primary land use is commercial <br />and residential development. The flood plain along Toll Gate <br />Creek, between the confluence of East and West Toll Gate Creeks <br />and Sand Creek, is about 20 percent developed and contains about <br />600 acres of land. The primary land use is residential develop- <br />ment. The Sand Creek basin flood plains contain more than 1,500 <br />homes and 600 house trailers, commercial and industrial estab- <br />lishments, oil refineries, and transportation facilities. <br /> <br />c. Runoff from the Sand Creek basin contributes to the <br />flood problems along the South Platte River from Sand Creek to <br />Fort Lupton. Development immediately downstream from Sand <br />Creek consists of older residential, mixed commercial, and <br />concentrated industrial to newer industrial. Much of the <br />flood plain in the downstream portion of the reach is rural <br />and devoted to such uses as irrigated truck farming, livestock <br />feedlots, and fringe industries serving agriculture and metro- <br />politan needs. About 13,700 acres of land are located in the <br />flood plain within this reach. <br /> <br />d. Water supply. Water yields in the Sand Creek basin <br />are inadequate to provide the existing and future needs of the <br />basin. Most of the basin's supplies are, at present, imported <br />from other areas. <br /> <br />e. Recreation. As urban development inc:reases within the <br />basin, the demand for additional recreational facilities will <br />increase. Local interests have indicated a need for local and <br />regional park development. In addition, local interests have <br />indicated a need for open-space development along the flood <br />plains in the Sand Creek basin. The water y'leld from the Sand <br />Creek basin is inadequate to support recreation pools in poten- <br />tial reservoirs without the importation of supplemental water <br />supplies. <br /> <br />f. Water quality. Four municipal sewage treatment facili- <br />ties are located in the basin. Ef'fluent from numerous industrial <br />plants also enters the 'stream. The base flow in the Sand Creek <br />basin, which occurs from Aurora to the South Platte River, is <br />essentially waste water. <br /> <br />g. Erosion and sedimentation. Erosion and sedimentation <br />are major problems in the Sand Creek basin during flood periods. <br /> <br />47 <br />