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Wyoming Water Development Commission 
Harry C. LaBonde, Jr., PE, Director 
6920 Yellowtail Rd, Cheyenne, WY 82002 
Phone: 307-777-7626 

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 18. PROJECT:Cheyenne South Crow Diversion
SPONSOR:City of Cheyenne
LOCATION:Laramie County
Purpose Chapter Session Account Appropriation Due Date
Level II 81 1999 II $80,000 2000

This project consists of rehabilitation of the South Crow Diversion Dam located approximately 20 miles west of Cheyenne. The city of Cheyenne constructed the dam in 1911 to impound and divert the flows of South Crow Creek for municipal use. Depending upon the time of the year, it is estimated that 0 to 3 mgd can be diverted to Cheyenne's water system.

During the past several years, the city has not relied upon the waters of the system and the dam has developed several structural problems, with numerous leaks through the dam and severe concrete sloughing at various locations. As Cheyenne grows, and the use of both potable and raw water also grow and the need for additional water also increases. The city may want to place System Control and Data Acquisition and metering upgrades on the South Crow Dam and Reservoir along with the dam and reservoir rehabilitation.

In 1999 the legislature approved $80,000 to evaluate the current condition of the South Crow Diversion Dam and to evaluate the rehabilitation options to bring the dam up to current standards. The time needed to test the dam conditions and the surrounding area requires a two year program which will be completed in the summer of 2000.

In 2000 the Commission recommended phasing the project. The first phase is the final design of the project with a cost of $70,000 and phase two is actual construction of the project which is estimated at approximately $1,096,000. This was due to the limited funds for year 2001.

The WWDC recommends the project be advanced to Level III in the Rehabilitation Program with an appropriation of $70,000 for final design of the project. The financing plan includes a 50% grant of $35,000 and a 50% loan of $35,000 for 20 years at 7.25% interest.

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