City of Sanborn, IA

Sanborn, IA

Key Features:

  • New moving bed biofilm reactor (MBBR) wastewater treatment facility
  • Designed to treat up to 2.61 million gallons of water and 5,000 pounds of BOD/day
  • Pretreatment including two mechanical spiral screens and non-mechanical grit removal
  • New final clarifier and aerobic sludge digester
  • New outfall line
  • 400 kW backup generator & automated systems

Key Experience:

  • Maintaining the use of the existing facility and utilities while constructing the new system within a congested site
  • Coordinating treatment capacity, selection, and funding with a large industrial user
  • Working with the Iowa DNR, Iowa Finance Authority, and the EPA to properly abide by the requirements of the SRF funding

Wastewater Treatment Facility

DGR worked jointly with the City of Sanborn, Iowa and a large industrial user to evaluate multiple treatment alternatives. Ultimately, the selection of the MBBR was chosen based on cost, operational flexibility and most importantly, limited land availability. Due to the large fluctuations in the industrial loading, a fixed film treatment technology was selected in lieu of activated sludge. Construction of the project started in the beginning of 2019 and was completed in Spring 2020.

Click here to see the facility in action.

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Neighborhood Revitalization

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Water Treatment Plant

The building is expandable to add future treatment equipment that can double the treatment capacity as water demands increase in the future. With three times more water available and enough annual water appropriation to operate at full capacity all year long, the new facility has become Red Rock’s primary water source.

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Water System Improvements

The water tower serves as both a critical piece of Sheldon’s drinking water infrastructure and as a welcome beacon for the City.

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Drainage Channel Improvements

DGR designed the channel to handle more capacity and protect the area from future flooding, which required making the channel deeper and wider.

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Athletic Field Site Design

Project planning by Augustana University and DGR Engineering to upgrade Bowden Field to a championship level began in 2018, and eventually culminated in a new facility which opened for the 2023 season.

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