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<br />I <br />I <br />II <br />I <br />I <br />I <br />I <br />! I <br />I <br />:1 <br />II <br />I <br />I <br />I <br />I <br />,I <br />I <br />I <br />I <br /> <br />3 <br /> <br />received August 17, 1987. We were asked to Investigate four Items: <br /> <br />1. An Improved inlet to the existing Colorado & Southern (C8oS) Rallroad concrete <br /> <br />arch culvert. <br /> <br /> <br />2. The new outflow characterIstics of the recently completed Ketner Reservoir <br /> <br /> <br />sp11lway improvements. <br /> <br />3. The Inclusion of storage upstream of the C80S railroad. <br /> <br /> <br />4. The effects of Items 1, 2, and 3 on the hydrographs and peak discharge rates <br /> <br /> <br />upstream of the C80S Rail road and the resulting water surface prof1les between <br /> <br />the railroad and Standley lake. <br /> <br />1973 Study <br /> <br /> <br />The 1973 study is entitled 'Big Dry Creek Preliminary Design.. The study was com- <br /> <br />pleted by the firm of Wright-Mclaughlin EnQineers In March 1973 for the Urban <br /> <br /> <br />Drainage and Flood Control District (UD8oFCD), the city of Westminster, Adams <br /> <br /> <br />County, and Jefferson County. <br /> <br />1986 Study <br /> <br /> <br />The 1986 study Is entitled 'Flood Hazard Area Delineation, Big Dry CreeL' The study <br /> <br />was completed by the firm of Greiner Engineering in November 1986 for the UD&FCD. <br /> <br /> <br />The floodplain defIned In this 1986 study In the vIcinity of the Bruchez property Is <br /> <br /> <br />shown on sheets 6 and 7 of 83 at the back of this report. <br /> <br />Sources of 1nformaUon <br />Several sources of Information were used during the course of this stUdy In addition <br />