Laserfiche WebLink
<br />SECTION 22 PLANNING ASSISTANCE TO STATES <br /> <br />FLOOD MITIGATION MEASURES FOR 1?HE <br />SOUTH PLATTE RIVER AT STI~RLING, COLORADO <br /> <br />1. INTRODUCTION <br /> <br />1.1 Authority. This study w,as performed under the authority of <br />Section 22 of Public Law 93-251, Wate:c ReElources Development Act of 1974, <br />Planning Assistance to States, and a request from the Colorado Water <br />Conservation Board. Section 22 provides the authority for the Corps of <br />Engineers cooperation with the States for assi!3tance in preparing <br />comprehensive state water plans fo': the development, use and conservation <br />of available water resources. This effort was accomplished through a <br />coordinated effort with the Colorado Water Conservation Board and the City <br />of Sterling to enhance its planning of watl3'r resource projects pertaining to <br />flood control. <br /> <br />1. 2 Scope and Objectives. The primary objective of the Section 22 <br />study was to develop hydraulic datil ne"ded to determine the effect:s of flood <br />mitigation projects along the Soutll Platte River at St:erling, Colorado. The <br />results will be used in developing a cC)mprE~hensive plan for the South Platte <br />River Floodplain. The data developed will include existing Gonditions, <br />existing conditions floodway, effects of a proposed ci.ty levee, effects of a <br />channel clearing option, effects of a channel improvement option, effects of <br />an alternate levee option, and effect8 of a floodway mitigation with levee <br />option. <br /> <br />1.3 Location. The City of sterling iH located in the Northea.st corner <br />of Colorado in Logan County. Tile ci.ty is on the le,ft bank of the South <br />Platte River at its junction with V.S. Highway 6. <br /> <br />2. <br /> <br />BACKGROUND DATA. <br /> <br />2.1 Survey Information. Topographic mapping developed from aerial <br />photography taken in December 1976 was used in this study. This mapping was <br />also used in the Flood Plain Information Study completed in September 1978. <br />Bridge and roadway information was also furnished at that time by the <br />Colorado Water Conservation Board. The survey data was coded into a HEC-2 <br />hydraulic model format for the Flood Plain Information Study. That model <br />served as the basic model for this study. <br /> <br />3 <br />