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<br />The analysis of the Town showed it is divided into 5 major <br /> <br /> <br />basins each comprised of multiple subbasins. (See Maps 1.1 & <br /> <br /> <br />1.2). Basin 000 (subbasins 001 through 003) consists of a small <br /> <br /> <br />buffer strip immediately adjacent to Coal Creek and produces no <br /> <br /> <br />runoff that directly impacts the Town. Basin 100 (subbasin lOll <br /> <br /> <br />is a small parcel north of Cheesman between Kattell and the Creek. <br /> <br /> <br />Basin 200 (subbasins 201 through 212) runs generally between <br /> <br /> <br />Briggs Street and the Creek for the full length of the Town. <br /> <br /> <br />Basin 300 (subbasin 301 through 3441 comprises the remainder of <br /> <br /> <br />the Old Town area with the exception of the area west of the <br /> <br /> <br />abandoned railroad and north of Cheesman. This is basin 400 <br /> <br /> <br />(subbasins 401 through 405). Basin 300 also includes 25 acres of <br /> <br /> <br />tributary area west of Northeast County Line Road. <br /> <br /> <br />Flows from basins 100, 200 and 300 ultimately join north of <br /> <br /> <br />Evans between Kattell and Briggs and enter Coal Creek. The flows <br /> <br /> <br />from basin 400 are confined by the Lower Boulder Ditch and either <br /> <br /> <br />enter the ditch or remain in fields north of town. The flow <br /> <br /> <br />rates leaving town shown in the calculations assume no detention <br /> <br /> <br />storage in the low points throughout the Town and those values <br /> <br /> <br />are used for storm sewer design. In actuality, the existing flow <br /> <br /> <br />rates would be significantly less because of detention and <br /> <br /> <br />retention in these low points. Improving the local roads and <br /> <br /> <br />installing a storm sewer will eliminate most of these low points <br /> <br /> <br />and provide reasonable drainage conditions duri~g minor storms. <br /> <br />D/2623 <br /> <br />-5- <br />