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<br />111-4 <br /> <br />confluence with Clear Creek. Since the sewer capacity is adequate only for <br />the initial storm flows, the major storm flows "split" and the excess flows <br />to the northwest intersection of Sheridan Boulevard and the railroad tracks <br />where the water ponds. Some additional storm flows are picked up by the <br />existing storm sewer which follows Sheridan Boulevard to Clear Creek, but a <br />majority of the flows overtop the railroad embankment and follow the tracks <br />eastward to Tennyson Street. <br />3. Clear Creek Planning Basin <br />The Clear Creek Planning Basin contains 1.102 sq. mi. (705 acres) and "is <br />enti re ly withi n Adams County. The basi n contai ns severa 1 small er basi ns, a"ll <br />of which are tributary to Clear Creek directly, without any major drainage <br />feature. The main features of the basin are the several ponds and gravel pHs <br />which serve to contain the storm runoff from the areas and essentially isolate <br />the sub-basin from the rest of the basin. <br />Due to the isolated nature and size of the smaller sub-basins of the <br />Clear Creek Planning Basin, alternative drainage improvements for the sub-b~sins <br />were not investigated, as the analysis would be more detailed than specified <br />by the scope of work. Instead, the potenti a 1 problem areas wi 11 be discussl~d <br />in the results of Section III-G and it is anticipated the local governmental <br />agencies will administer these areas under standard drainage regulations. <br />C. Basin Hydrology <br />The next step in the hydrologic analysis was to define the runoff peaks <br />and volume for the existing and future development conditions for each of the <br />sub-basins and then combine the flows to define the design flows at critical <br />points. The design flows were used to define the different flood plains and <br />hence potential drainage problem areas. <br /> <br />i <br /> <br />. <br />