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Janesville Pumping Station No. 12 and 14 –
Janesville, WI
The
City of Janesville derived their water
supply primarily from three shallow sand and gravel
wells located throughout the city. Nitrate levels in the
shallow aquifer had been gradually increasing. A study
of the existing wells was conducted to evaluate options
for addressing elevated nitrate levels in the aquifer.
The result of this study was a recommendation that water
from the shallow wells be blended with the deep sand
stone aquifer, a source with no detectable nitrates.
We provided engineering services for the nitrate study,
well siting, well construction, blending reservoir, and
pumping station for this project. The Pumping Station
No. 12 project consisted of a new 2,500 gpm deep
sandstone well, new 300,000 gallon blending reservoir, a
7,500 gpm booster pumping station, modification of the
existing 4,800 gpm shallow sand and gravel well, well
pump, standby power, 16-inch raw water connecting main,
20-inch discharge main, and new fluoride and chlorine
addition.
Pumping Station No. 12 is located in a park adjacent to
the Rotary Gardens, a 15-acre botanic garden with a
variety of international and themed garden areas. It was
important to the City that the pumping station
compliment the Rotary Gardens, which had recently
completed an addition to their visitor’s center. To
accomplish this, architectural elements from the Rotary
Garden’s addition were incorporated into the exterior
appearance of the facility.
The pumping station No. 14 project consisted of a new
2,400 gpm deep sandstone well, new 4000,000 gallon
blending reservoir, 7,500 gpm booster station,
modifications to the existing 4,200 gpm shallow sand and
ground well, standby power, connecting main, and
chemical addition.
Both projects included significant modifications to
motor control centers and controls at the existing well
houses as well as providing standby power generation.
Well No. 3 –
Bristol, WI
The Town of Bristol has seen rapid
development over the past five years and expects to
continue growing into the foreseeable future. The Town
realized the resulting need for additional water supply
and hired us to complete all phases of their Well No. 3
project. After completing a well siting study, we
designed a 1,500-foot-deep sandstone well to produce a
minimum of 750 gpm.
We proceeded with preparation of bidding and contract
documents for the well drilling phase. We provided
part-time observation during the drilling process.
Drilling was completed in December of 2005.
In order to save time on the project, we designed the
well facility during well drilling using water quality
data from a nearby deep well. When drilling of Well No.
3 was complete, water quality analysis confirmed our
initial assumption that iron and radium removal would be
needed. The Well No. 3 facility design included a
pressurized iron filter and the addition of hydrous
manganese oxide for radium removal. The facility was
also designed with tablet chlorination, backwash
detention, and standby power.
We provided part-time observation during facility
construction. We also provided assistance during
start-up and during integration of their new SCADA
system. Bristol’s Well No. 3 facility was substantially
complete in January of 2007.
The State of Wisconsin requires all new wells to have an
approved wellhead protection plan in place before
putting the facility online. We completed a wellhead
protection plan for Well No. 3 and included Bristol’s
Wells No. 1 and No. 2 so each would be covered by the
plan. The plan was submitted to DNR and approved prior
to completion.
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