Marne Creek Flood Mitigation	Platte Eastside Drainage Project	Tea Storm Sewer Project	Willow Ridge Drainage Study

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Platte Eastside Drainage Project

Platte, South Dakota

A long-term effort to manage storm runoff into and from the eastern portion of Platte prompted the Platte Eastside Drainage Project. Platte has very little topographic relief and is situated on glacial till soils that drain quite slowly. A small earthen channel that meandered through the backyards of eastside Platte had historically flooded adjoining residences with the storm waters it carried. Approximately 80 acres of adjoining agricultural property drained directly into the existing channel through a 36-inch culvert. To correct the problem, various solutions had been explored over time. Eisenbraun and Associates’ studies determined that the drainage into the community could not be routed effectively around the community; therefore, a project would need to be designed to handle the incoming flow. The study recommended that the existing channel through the community be altered such that the drainage would be directed to underground piping in City right-of-way. The report resulted in a FEMA grant in which the City obtained 75 percent funding for the project.
As with any major civil project, differing views within the community existed. Eisenbraun and Associates worked with the City of Platte to have numerous public hearings to work through the citizens' concerns. Following the hearings, the project proceeded with E/A in charge of design, bidding, and construction administration of the project. The project was completed and the drainage system has performed as designed without any localized flooding problems since.