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Artist's rendering of the clearwell and two pump stations.
Water Purification
Photos of the New Clearwell
and Pump Stations
Drinking Water Quality
Backflow Contamination
Water Transmission
and Distribution
Lake Springfield
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As part of its multi-phase, multi-year Water Works Infrastructure Improvement Program, which was launched in 2008, CWLP has constructed a new $8.3 million, six-million gallon underground clearwell that provides on-site water storage at the utility's Stevenson Drive plant complex. A clearwell is a large storage tank that holds treated drinking water for a several hours before it is distributed throughout the city for use by consumers. The holding period allows time for chlorine added to the water during the purification process to complete its work disinfecting the water of bacteria and other potential pathogens that might have been present in the raw water supply.

CWLP recently completed construction on a new six million gallon clearwell that was placed into service in May 2014. Completion of the new clearwell, as well as a new high-service pump station, allowed the utility to remove from service the oldest of its two existing underground clearwells, which was built in the mid-1930s. Once the new clearwell—which acts in tandem with the remaining existing underground clearwell (which was built in the mid-1950s)—was placed in operation, the utility's total clearwell capacity increased from six million gallons to 10 million gallons. The new clearwell's interior consists of a series of "baffle" walls that direct the flow of water through the clearwell.. This ensures the chlorine added to the water during the purification process has adequate time to disinfect the water.

Projects being undertaken as part of the utility's Water Works Infrastructure Improvement Program are being funded by revenues raised as a result of a four-step rate increase that began in May 2008. The final increase took effect March 1, 2011.

Building New Water Pump Stations
In conjunction with the clearwell, the utility's Water Works Infrastructure Improvement Program also called for the construction of two water pumping stations: a high-service station located immediately south of the new clearwell, and a low-service station east of it, along the lake shore just southwest of Spaulding Dam. These facilities were designed to house the low- and high-service water pumps that have been located in the Lakeside Power Station since the lake and that facility were built in 1935. The Lakeside Power Station and the equipment in it have served their useful lives. The electric generating units housed there were decommissioned after the Dallman 4 Power Station was completed in 2009.

The new low-service pump station, which is located closest to the lake and was completed in the fall of 2014, pumps raw water from the lake to the Purification Plant. The high-service pump station, which was completed in May 2014 and is located just south of the new clearwell, pumps water from the clearwell into the citywide water distribution system. This system consists of over 760 miles of transmission and distribution mains.

The total cost of building the new pumping stations and clearwell was $41 million.

To see photos showing the progress of the new clear well and pumping stations construction projects, click on the blue expandable "Water Division" panel on this website's Literature, Photos and Videos page.

Links to more information about water purification and related topics can be found in the left-hand column of this page.


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