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Ralston Creek Outlet



Ralston, NE

Twin, 84-inch diameter, corrugated metal pipes (CMP) connecting the Ralston Creek to the Big Papio Creek were nearing the end of their forty-year lifespan, evidenced by buckling, rust and loss of section. The Papio-Missouri River NRD needed a quick solution for replacing them.

Description

E&A was hired to replace these pipes and deliver the replacement culvert. We obtained soil borings at the project site to evaluate soil loading conditions where the culvert would be placed and conducted a hydrologic and hydraulic study to evaluate current runoff volume from Ralston Creek. A final structural design was prepared for a 7′ by 12′ twin reinforced concrete box culvert. E&A coordinated environmental permitting with USACE, NDEQ, the US Fish and Wildlife Service and Nebraska Game and Parks. Bids came in under budget, and construction was completed in a timely manner. When the new box culvert was complete, the old CMP structure was removed and Ralston Creek was adjusted to use the new outlet.

Key Partners

Papio-Missouri River NRD
M.E. Collins Contracting Co., Inc.