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GASP FS for Sedgwick
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GASP FS for Sedgwick
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Last modified
3/8/2013 3:46:58 PM
Creation date
2/20/2013 10:08:11 AM
Metadata
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Template:
Water Supply Protection
State
CO
Basin
South Platte
Water Division
1
Date
2/1/1998
Author
TuttleApplegate, Inc.
Title
Feasibility Study for Sedgwick Reservoir for Groundwater Appropriators of the South Platte River Basin Inc. (GASP)
Water Supply Pro - Doc Type
Report/Study
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• <br />• <br />investigations done to determine if these excess flows during the compact time period (April 1- <br />October 15) would actually be available at the project facilities. The study results did show that there <br />is ample water available for diversion during the winter months. <br />These daily averages were averaged on a monthly basis to provide an average flow for the month. <br />The results show there is a minimum of 94,000 acre -feet of water that could be re- regulated on a <br />long term annual average. Based on the demands necessary to satisfy a 2,000 acre -foot reservoir <br />with fill and refill rights, there is an adequate water supply in the river for this project. <br />The water available for diversion was considered to be 100% deliverable to the reservoir. This <br />assumption was made based on a conversation with the operator of the Peterson Ditch. The operator <br />indicated that the Peterson Ditch diversion structure was capable of diverting all flow from the South <br />Platte River and that the Peterson Ditch was a gaining reach from the river to the proposed reservoir <br />site. Ditch seepage calculations are beyond the scope of this project. It would be assumed that there <br />would be some minor losses at certain times of the year, but are not significant. <br />E. Permitting Considerations <br />The proposed project will require several permits to allow construction to begin. These include local, <br />State and Federal permits. The most significant of the permits necessary for this project is a permit <br />under Section 404 of the Clean Water Act (404) permit for activities associated with wetlands. The <br />State of Colorado will consider this a jurisdictional dam. This will require approval of construction <br />plans and documents by the dam safety branch of the State Engineer. Other minor permits. associated <br />with the project will include a fugitive dust permit for air quality, an NPDES permit for any <br />construction dewatering activities and a stormwater management permit. <br />8 <br />
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