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<br />I <br />, I, <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />1 <br />I <br />I <br />I <br />1 <br />I <br />I <br />I <br />I, <br />I <br /> <br />1. 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 layouts by <br />hydroulic 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 of 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 basin is located in the northern part of the Denver <br />metropolitan area; it extends from Federal Boulevard east to the South Platte <br />River, and from about 78th Avenue north to 100th 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, Thornton and Adams County, in <br />the basin. A map of the basin 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 boundaries 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 />