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 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 Level III rehabilitation 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. 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 is a good candidate for stimulation or fracturing.
This stimulation effort is scheduled for the Spring of 1997.
RECOMMENDED LEGISLATIVE ACTION:
No legislative action is required on this project.