Nicollet County Ditch 86A Pumping Station

Nicollet County, MN | Water

ISG partnered with Nicollet County and local landowners to design and construct a pumping station to protect the flooding of crop land.

Swan Lake, an immense waterway and natural wildlife habitat, was experiencing overflow and flooding a third of the County’s watershed. ISG was committed to providing a solution that would not negatively impact the lake or its inhabitants.

ISG engaged Nicollet County and multiple landowners on the design of a pumping station to increase flow rates while not impacting the lake. Utilizing the cutting-edge software, XPSWMM and InfraWorks, water resource experts modeled the system to determine how the lake would react to upsized pumps and created renderings of the pumping station to provide clear visuals to stakeholders. The pumping station needed to meet the demands of 4,300 acres and 90,000 gallons per minute (GPM) making it a challenge to size the pump station correctly for the amount of flow running through it. Offering stakeholders comprehensive services and specialized resources within a single firm, ISG’s multi-disciplinary team collaborated on the design of the pumping station to optimally serve the entire watershed. Though currently in the construction phase, once completed the tri-plex pumping structure will be a 24 feet wide by 45 feet long cast in-place concrete structure, with the main flow pump measuring 48-inches in diameter and a small pump of 16-inches. The firm’s simplified solutions created smooth coordination, building a platform for the County and landowners to accomplish their mutual watershed goals.