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<br />. <br /> <br />Act, the work would fall within the purview of the nationwide <br /> <br /> <br />permit because the project would ~ located at a point on <br /> <br /> <br />Westerly Creek where the average annual flow is less than 5 cubic <br /> <br /> <br />feet per second. <br /> <br />Conclusions <br /> <br />Severe flood and drainage problems exist in the Westerly <br /> <br /> <br />Creek basin. In the' basin, upstream from Lowry Air Force Base, <br /> <br /> <br />the construction of detention ponds by local interests has <br /> <br /> <br />eliminated much of the nuisance flooding but the continued urbani- <br /> <br /> <br />zation in that area has led to the need for improved drainage <br /> <br /> <br />facilities. MOre important is the need for the safe conveyance <br /> <br /> <br />of drainage and floodflows from the upstream area through the <br /> <br /> <br />downstream portions of the basin since the Highline Canal is no <br /> <br /> <br />longer effective in the diversion of runoff which has increased <br /> <br /> <br />as a result of urbanization. <br /> <br />The natural channel of Westerly Creek through Lowry Air Force <br /> <br /> <br />Base has been obliterated by development of the base. Although <br /> <br /> <br />the channel has been replaced with an underground storm drain, <br /> <br /> <br />the floodway remains, and with the increased upstream runoff, the <br /> <br /> <br />base is more susceptible to flooding. <br /> <br />The most serious problem is centered in the heavily developed <br /> <br /> <br />are" downstream from Lowry Air Force Base. As a result of the <br /> <br />. <br /> <br />72 <br />