PROJECT INFORMATION:
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 were
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 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.
RECOMMENDED LEGISLATIVE ACTION:
The WWDC recommends the project be advanced to Level III construction
status with an appropriation of $305,000. The WWDC further recommends
that the project financing include a 60% grant ($183,000) and a 40% loan
($122,000). In addition, 40% ($92,800) of the Level II well
construction costs ($232,000 total) will be added to the loan amount.
The total loan amount will be $214,800 at 7.25% interest and a term of
30 years.
