The town 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 is under an
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 were incorporated into a Level III rehabilitation project for the
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. A
deep Madison formation well was drilled during 1996, however, the yield was inadequate to replace
the infiltration gallery. Analysis and testing of the well has indicated that the well was a good
candidate for stimulation or fracturing. This stimulation effort was completed during 1997. The
yield of the well was increased from about 60 gpm to about 220 gpm.
The plans and specifications for construction of the water storage tank and the transmission pipeline
are complete. The project has been under construction during 2000 and will be finalized in early
RECOMMENDED LEGISLATIVE ACTION:
No legislative action is required.