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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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 94. PROJECT:Riverton Valley Irrigation
LEVEL:New Application
SPONSOR:Riverton Valley Irrigation District
LOCATION:Fremont County

Flow measurements on the Riverton Valley Canal were conducted as part of the Wind River Basin study. The Riverton Valley open laterals experience high exfiltration as well as high maintenance costs. In 1994, the Commission recommended the project be advanced in the Rehabilitation Program to Level III status with an appropriation of $350,000. This project addressed twelve laterals under the main canal system. These open canals were replaced by buried pipelines, which greatly reduced maintenance costs and water losses. The district prioritized system repairs and work was completed in four phases from 1995 through the spring of 1999. The project appropriation served as a grant for project materials, with payments only being made for materials invoiced to the district. The district was responsible for all costs related to project design, permit procurement, land procurement, construction engineering and construction of the project.

The Riverton Valley Irrigation District would like to rehabilitate the remainder of their laterals in a similar manner. The district has realized a 25% increase in efficiency since making these improvements. Continued rehabilitation of the system would further increase efficiencies, assist in maintenance, and ultimately improve the ability to deliver water to the users. Due to the time frame since the Level III project was initiated, a detailed cost analysis of piping the remainder of the laterals is warranted.

The WWDC recommends that the project be included in the Rehabilitation Program at a Level II status with an appropriation of $40,000.

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