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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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 34. PROJECT:Greybull Water Supply
SPONSOR:Town of Greybull
LOCATION:Big Horn County
PROGRAM:New Development
Purpose Chapter Session Account Appropriation Due Date
Level II 8 1995 I $75,000 1996

The town has been experiencing water shortage and low pressure problems with their supply system, however, their reasons for these deficiencies was not clear. Their system consists of an infiltration gallery, two flowing wells, two tanks with 1.3 million gallons of storage, and a number of manual and automatic control valves. The town was experiencing some difficulty supplying water due to the need to throttle the valves in the Shell Valley to maintain pressure to the rural users. The town is also under administrative order from EPA for violations of the Surface Water Treatment Rule associated with the diversion through the infiltration gallery on Shell Creek.

In 1995, the Level II study identified several needed improvements to the Shell Creek transmission pipeline. These improvements have been incorporated into a recommendation project for the town.

The administrative order has placed Greybull in the position of needing to either build a water treatment plant or find a groundwater source that is not under the influence of surface water.

The WWDC recommends the project be continued in the New Development Program at Level II status with an appropriation of $400,000 to provide for drilling a Madison Formation test well.

The WWDC recommends the project components that were identified for rehabilitation be included in the rehabilitation program at Level III status with an appropriation of $335,000. The proposed financing plan would include a 50% grant and a 50% loan at 4% for 20 years.

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