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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 />I, Update and Finalize hydrology prepared under <br />Phase A, <br /> <br />2, Prepare design criteria to be used throughout <br />the Phose B study. <br /> <br />3. Determine discharge capacity of all structures <br />crossing the drainageway, <br /> <br />4. Prepare layouts, reach by reach, of possible <br />channel and structure modifications using pre- <br />liminary cost estimates and possible flood <br />damages as a guide, <br /> <br />5, Verify the adequacy of the proposed layauts by <br />hydraulic computation, <br /> <br />6. Prepare cost estimate of recommended layouts, <br /> <br />Hydralogy <br /> <br />A detailed description of the hydrologic studies of the Niver Creek <br /> <br />basin is given in Chapter III af the Phase A report, The following is a summary <br /> <br />of that chapter and a description of the work performed under Phase B, <br /> <br />The Drainage Basin <br /> <br />The Niver Creek bosin is located in the northern part of the Denver <br />metropolitan areo; it extends from Federal Boulevord eost to the South Platte <br />River, and from about 78th Avenue north to IOOth Avenue. The major north- <br />south traffic artery, Interstate Highway 1-25, runs through the heart of the basin, <br />There are three municipalities, Federal Heights, Tharnton and Adams County, in <br />the basin, A map of the bosin boundaries is shown on Plate 11-1, <br /> <br />The basin boundaries on Plate II-I show the limits of the Niver Creek <br />drainage area. These baundaries were taken from the drainage basin descrip- <br />tions prepared for Project REUSE by the Denver Regional Council of Governments <br />and the Urban Drainage and Flood Control District. They were verified and ad- <br />justed slightly after field inspection. <br /> <br />11-2 <br />