Sioux Rapids Water Treatment Plant

Sioux Rapids, IA | Water


ISG performed a hydraulic separation study to identify a viable location for a new well for the City of Sioux Rapids and completed the planning and design of a modern water treatment plant (WTP).


The City of Sioux Rapids needed to replace its failing treatment plant and install a second drinking water well as a contaminant plume was migrating towards the existing well.


In partnership with the Iowa Department of Natural Resources, ISG identified a plume of Trichloroethylene (TCE) migrating towards the well serving the City of Sioux Rapids. Through further testing, the migration pattern was identified and a new well was sited to avoid the contamination plume. In addition, the treatment system design included a 250 Gallons Per Minute (gpm) aeration, detention, and filtration system for iron removal, and three ion exchange removal units for nitrates and chlorine disinfection. New controls with remote accessibility were included within the new facility for easy maintenace.

While installing a second drinking water well, ISG performed a hydraulic separation study and found that drilling a well on the opposite side of the Little Sioux River, located along the City of Sioux Rapids, provided hydraulic separation from the contaminant plume. Consequently, a 250 gpm shallow well was installed in the alluvial aquifer for the City.

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