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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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 33. PROJECT:Gillette Madison Well Field Expansion
SPONSOR:City of Gillette
LOCATION:Campbell County
PROGRAM:New Development
Purpose Chapter Session Account Appropriation Due Date
Level III 206 1995 I $1,139,000* 1999
Level III 59 1996 I $519,250* 1999
*67% grant

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 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 study established a schedule for rehabilitating Gillette's existing Fort Union well field, (included as a Level III recommendation in the 1995 Rehabilitation Program) for developing maximum production from the Madison well field, and eventually for a new Fort Union well field.

This project addresses the expansion of the Madison well field. Two new Madison wells have been designed and drilled and one Madison well was fractured in 1996. In 1998, two new Madison wells were converted to production status and connected to the existing pipeline. This project was complete in December, 1998. The remaining work consists of a small project to provide cathodic protection for the new pipeline. This final project will be complete in 1999.

No legislative action is required.

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