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Redbank and Fancher Creeks, California: General Design Memorandum

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Design memorandum no. 1

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The purpose of the Redbank and Fancher Creeks, California local flood protection project is to reduce losses from floods in the Fresno-Clovis Metropolitan area and on surrounding agricultural lands. This General Design Memorandum presents the analyses and designs completed subsequent to submission of the Feasibility Report to Congress for authorization. The existing Big Dry Creek Dam on Dry Creek will be raised about 7.6 feet to increase the gross pool capacity from 16,500 acre-feet to 31,785 acre-feet, essentially eliminating flooding on 11,100 acres. The resulting level of flood protection will be increased from the current 60-year level to Standard Project Flood SPF level of protection. The Dry Creek Crossing of the Friant-Kern Canal will be modified to insure passage of the SPF into the reservoir. The two existing outlet works and spillway will be replaced. The reservoir operation will remain the same. Fancher Creek Dam will be located adjacent to and east of the Friant-Kern Canal. It will have a capacity of 10,304 acre-feet and in conjunction with Redbank Creek Detention Basin will provide 200-year level of protection to about 26,300 acres. The ungated outlet works and spillway are combined into one structure so that the existing Fancher Creek overchute of the Friant-Kern Canal can be used to discharge flows to Fancher Creek, west of the canal. Pup Creek Detention Basin will be located on Pup Creek, a tributary to Dry Creek. The 495 acre-foot basin will be partially excavated and partially embankment contained. It is designed to control the 200-year flood with a maximum release of 25 cfs. The outlet works will be ungated. Embankment will be no more than 3 feet above natural ground and no spillway will be provided. alluvial Drain Detention Basin will be located on alluvial Drain, a tributary to Dry Creek.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

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