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<br />SECTION I <br /> <br />INTRODUCTION <br /> <br />This major dralnageway planning study for Big Dry Creek in Adams <br />and Jefferson Count ies Is a part of tho' 1972 work pr09ram of the Urban <br />Drainage and Flood Control District of the Denver Metl-opol itan Area. This <br />study has been performed for the City of Westmin!lter, Jefferson County, <br />Adams County, and the Urban Drainage and Flood Control District. <br /> <br />The Big Dry Creek drainage basin lies in thE' northern portion of the <br />Denver metropol itan area, is made up mostly of a~lricultural sub-basins, <br />and the total area of the basin Is 86,3 square mIles, with elevations <br />ranging from 5040 feet to 6500 feet. The Big Dry Creek drainage basin is <br />In Townships I and 2 South, Ranges 67, 68, 69 and 70 Vest of the 6th <br />Principal Meridian. <br /> <br />The reader is cautIoned not to confuse this Big Dry Creek with the <br />Big Dry Creek lying In the southern pOl't ion of the Denver metropol i tan <br />area, or with the stream wIth a s imllal' name fJOI.t!ng easterly from the <br />City of Boulder. <br /> <br />A signIficant portion of the near,.future populatl'on growth of the <br />Denver metropol itan area Is i Ikely to OCCUI" In the Big Dry Creek bas in of <br />Jefferson and Adams Counties. It Is for this reason that the Urban Drainage <br />and Flood Control District has identified this basin as a priority Item In <br />the continuing program of preparIng master plans for major drainages. <br /> <br />The fact that urban drainage costs can be reduced, and benefits in- <br />creased, by early action projects is well E~stabl Ished. <br /> <br />By performing the Big Dry Creek major drainage moister planning now, <br />rather than after deve i opment occurs, it is es t Imated that the pub I I cis <br />saved some five to ten million dollars in costs. At the same time, the <br />public Is able to achieve open-space benefits and numerous other auxil iary <br />benefits which normally would not accrue as ] Iberal Iy under a "corrE,ct Ive" <br />program. In other words, the "prevent Ive" program approach, of which this <br />study is a part, and which Is In accordance with the Urban Drainage Manual, <br />is the most opportune, tImely, and cost effective type of p.'annlng, <br /> <br />SCOPE OF WORK <br /> <br />The study Is broken into two phases, Phase A dealt with development <br />of alternative plans, approximate costs, dSlmage p,)tel1tlal, and ,'ecommen" <br />datlons for Improvements to the gulches. Bi3sed upon the results of Phase <br />A, the local entities and the Urban Dralna~. and Flood Control District <br /> <br />1- I <br />