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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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113.PROJECT:Sinclair Water Supply
SPONSOR:Town of Sinclair
LOCATION:Carbon County
Purpose Chapter Session Account Appropriation Due Date
Level I 10 1994 1 $250,000 1996
Level II 15 1996 I Hold 1998
Level II 82 1998 I Hold 2000
Level II 81 1999 I $50,000 2000

The town of Sinclair is an incorporated municipality with a population of 500. The town and the Sinclair Refinery share a common water system. The water treatment and distribution system for the town of Sinclair is operated by the Sinclair Refinery. The town has identified several deficiencies in their supply and distribution system. The existing 75,000 gallon tank was constructed in 1924 and is badly corroded. In 1993, the town requested funding for a water supply master plan to assess present/future needs and to evaluate the entire water system that was constructed seven decades ago.

A Level I master plan water supply study was completed by the WWDC in 1996. This study indicated that the treatment plant, tank and transmission and distribution lines need to be upgraded. The town and refinery have an agreement for the operation and maintenance of the water system. The town owns the water right. For the use of 90% of the water, the refinery pays up to $15,000 for operation and maintenance of the water system per year. The water system consists of a pretreatment unit which is located at the river. The water is run through a final treatment plant that purifies the water. Most of the refinery's 90% does not need to be potable.

The Level II Study was completed in July 2001. Previous to completion however, lengthy negotiations occurred between the town, Sinclair Refining, and the EPA ( The Town was under EPA Administrative Order procedures for exceeding turbidity standards). Ultimately, Sinclair Refining agreed to upgrade the N. Platte River treatment plant such that the entire stream originating at the plant would meet EPA primary drinking water standards except for disinfection and final filtration. The town's responsibility in this "partnership" is to pursue improvements including increased storage, a new transmission line, distribution system upgrades, and a 0.5 MGD treatment (filtration/disinfection) facility in town.

The WWDC recommends the project be incorporated in the New Development program and advanced to Level III construction with a grant-only request for an appropriation of $672,500.

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