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WSP11043
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Last modified
1/26/2010 3:15:49 PM
Creation date
10/12/2006 4:41:07 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8443.100
Description
Narrows Unit - Project Description
State
CO
Basin
South Platte
Water Division
1
Date
2/1/1978
Author
US DoI BoR
Title
SPECIAL REPORT Investigation of Review Issues Narrows Unit - Colorado Pick-Sloan Missouri Basin Program
Water Supply Pro - Doc Type
Report/Study
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<br />iG43 <br /> <br />'Existing Projects <br /> <br />There are no existing or authorized Federal projects in the study <br />area other than the Narrows Unit. There are, however, three dams <br />and reservoirs which were constructed or are under construction by <br />the Corps of Engineers in the Upper South Platte River Basin. They <br />are: the Cherry Creek Dam and Reservoir project constructed in the <br />1950's; Chatfield Dam and Reservoir on the South Platte River just <br />upstream of Denver which is nearing completion; and Bear Creek Dam <br />and Reservoir which is currently under construction on Bear Creek <br />just west of Denver. These dams, while taken into consideration by <br />the Corps, do not have any significant effect on the flood flows in the <br />study area. <br /> <br />'Potential Projects <br /> <br />There are no known potential projects in the basin that, if implemented, <br />would affect the current condition in the study area. <br /> <br />F1 ood Dama ge Ana 1 ys i s <br /> <br />A flood damage analysis was made generally in accordance with the <br />Principles and Standards established by the Water Resources Council <br />and approved by the President on October 25, 1973. <br /> <br />Reconnaissance investigations and post-flood damage surveys in the <br />Lower South Pla,tte River were available from prior reports and from <br />previous studies made for the Bureau of Reclamation in connection <br />with the Narrows Unit. These studies included a compilation of flood <br />histories and estimates of flood damages. The data developed in these <br />studies were supplemented by periodic field reconnaissance of the flood <br />plain to determine the number and type of improvements added to the <br />flood plain since the previous survey and to determine the existing <br />land use patterns. <br /> <br />Flood damage evaluations for various stream reaches for existing <br />conditions and for conditions with the Narrows Dam operation included <br />the development relationships and discharge-damage relationships and <br />combining these to obtain damage-probability relationships and average <br />annual damages. <br /> <br />, <br /> <br />14 <br />
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