STUMPY LANE DETENTION BASIN PROJECT
LEBANON, TN. – The City of Lebanon will consider entering into a Project Partnership Agreement (PPA) with the U.S. Army Corps of Engineers for the design and construction of the Stumpy Lane Detention Basin at the City Council meeting on July 21st.
The Stumpy Lane Detention Basin project plans to create a basin structure that will replace the existing bridge with a concrete arch culvert. The new culvert system, which is planned to be installed where Stumpy Lane and Sinking Creek intersect, is designed to have a smaller inlet area than the existing bridge structure. This smaller inlet area will reduce flow through the roadway embankment in order to create a detention area just upstream of Stumpy Lane.
The detention basin will be most effective during the more frequent storm events that occur every 2 to 10 years. A portion of the roadway embankment, 140 feet, will be sufficiently armored both upstream and downstream to handle these periods of overtopping.
“The detention basin will store and hold back storm water runoff to reduce flooding of many downstream properties between Stumpy Lane and the Lebanon Town Square,” said Jeff Baines, Lebanon Commissioner of Public Services. “While the detention basin has minimal impact during major floods such as the Nashville flood of May 2010, we believe this is an important step to alleviate more common stormwater issues in the area,” he said.
The project budget, which includes design, mitigation, easements, and construction, is estimated to be $2,118,000. This project will be 65% federally funded and 35% locally funded by the City of Lebanon. The City’s share of funding will come from a combination of the Stormwater Fund and the General Fund. Final determination will be made once construction bids have been received.
“Adding the detention basin will reduce the flood elevations in the populated area between Stumpy Lane and the Lebanon Town Square. This investment should significantly reduce flooding and stormwater damage claims that come with the more frequent storms,” said Mayor Bernie Ash.
If the Project Partnership Agreement is approved, design for the Stumpy Lane Detention Basin would begin late this fall. Design plans should be ready to bid by late 2021. Once the necessary property acquisitions and easements are complete, construction for this project could begin as early as the summer of 2022.
For more information, please contact Jeff Baines by email at jbaines@lebanontn.org.