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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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Project Reports

 30. PROJECT:Gillette Fort Union Well Field
SPONSOR:City of Gillette
LOCATION:Campbell County
Purpose Chapter Session Account Appropriation Due Date
Level III-I 206 1995 II $550,000* 1999
*50% grant

The City of Gillette has experienced considerable draw down and reduced production in their "in-town" wells tapping the Fort Union and Lance/Fox Hills aquifers. In addition, the city has made major expenditures in rehabilitating wells and replacing pumps. The Gillette Area Master Plan identified the importance of improved management of the multi source Gillette water supply system in order to reduce operation and maintenance costs, maximize production from existing sources, protect the long term yield of the Fort Union formation, and insure uniformity of water quality available to Gillette water users through blending of supply sources.

The 1994 project activities included pump testing and logging of existing wells, analysis of the operation and maintenance procedures for both the in-town wells and the Madison well field, and a review of overall system configuration. The 1994 study established a schedule for rehabilitating Gillette's existing Fort Union well field, for developing maximum production from the Madison well field (included as a Level III recommendation in the 1995 New Development program), and eventually for a new Fort Union well field.

In 1995, the design for the replacement of two wells was completed. After easements are obtained, this portion of the project will be bid. Also, in 1995, an existing well was rehabilitated. In 1996 three wells will be replaced and two supply pipeline will be constructed.

The WWDC recommends that the project appropriation be increased from $550,000 to $1,475,000 or $925,000. The appropriation will serve as a 50% grant with the City of Gillette responsible for the remaining 50% of the project budget. The total project budget is $4,060,000 of which the WWDC could ultimately provide $2,030,000. Additional funding requests of $555,000 are expected to complete the project during the 1998 Legislative Session.

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