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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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129.PROJECT:Viva Naughton Dam Enlargement
SPONSOR:State of Wyoming
LOCATION:Lincoln County
PROGRAM:New Development
Purpose Chapter Session Account Appropriation Due Date
Level II 10 1994 I Hold   1996
Level II 15 1996 I Hold   1998
Level II 82 1998 I Hold   2000
Level II 36 2000 I Hold* 2002
*A block appropriation of $15,000 was made for all hold projects

Recent investigations completed for the Green River Groundwater Recharge and Alternate Storage Study indicate enlarging Viva Naughton Reservoir is one of the more efficient water development projects in the state when considering yield and cost. The reservoir has an existing capacity of 42,393 acre-feet. With permits for an additional storage totaling 39,502 acre-feet for an estimated 2005 cost of $48,700,000. The existing reservoir is owned and operated by Scottish Power who has acknowledged an interest in the further investigation of the potential enlargement of Viva Naughton. The permitted enlargement reserves 10,752 acre-feet for irrigation on the Hams Fork down stream of the dam. During most years irrigators and municipalities depend on the releases from Viva Naughton, Scottish Power, however, has no obligation to continue this practice. This year's drought required Scottish Power to shut the reservoir off to all demands in addition to those required for electrical power generation. As a result downstream uses found the flows in the Hams Fork to be critically low. The town of Kemmerer has storage in Kemmerer Reservoir, however the reservoir has lost most of its capacity to silt.

The existing municipal and agricultural uses show a need for additional storage on the Hams Fork. The enlargement of Viva Naughton would provide a much needed source of late season water to all uses below the dam including of the Hams Fork Water Users association, and the towns Kemmerer and Diamondville.

The Commission recommends that the project be incorporated into the New Development Program at Level II with an appropriation of $300,000.00.

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