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Louisiana Comite River Diversion Aims at Reducing Flood Risk

Mon June 03, 2019 - Southeast Edition #12
Lori Tobias – CEG Correspondent


Work gets under way on the Comite River Diversion Canal Project in East Baton Rouge, La.
(LaDOTD photo)
Work gets under way on the Comite River Diversion Canal Project in East Baton Rouge, La. (LaDOTD photo)
Work gets under way on the Comite River Diversion Canal Project in East Baton Rouge, La.
(LaDOTD photo) The diversion project calls for construction of a 12-mi.-long channel from the Comite River to the Mississippi River.
(LaDOTD photo) Equipment is delivered to the job site in advance of the diversion canal excavation. Ground on the project was broken in April.
(LaDOTD photo)

The Louisiana Department of Transportation and Development (LaDOTD) broke ground in April on the long-awaited Comite River Diversion Canal Project in East Baton Rouge.

The $353 million project, a joint collaboration of the LaDOTD, the U.S. Army Corps of Engineers, the city of Baton Rouge and the Amite River Basin Commission, is expected to remedy flood problems within the basin caused by excessive rainfall that results in headwater and backwater overflow, said LaDOTD Public Information Officer Brandie Richardson.

"When there is excessive rainfall, the tributaries back up and directly impact residents and businesses in the area," Richardson said. "The Baton Rouge metropolitan area has expanded further into the floodplain to accommodate population growth. Examples of the need and severity of flooding in this area can be seen in the 1983 and 2016 floods that impacted thousands of homes and businesses. Once completed, this project will provide urban flood damage reduction to reduce risks from rainfall events and headwater flooding."

The project calls for construction of a 12-mi.-long diversion channel from the Comite River to the Mississippi River, a diversion structure at the Comite River, guide levees, a control structure at Lilly Bayou, and four drop structures at intersections of the diversion channel at McHugh Road, Bayou Baton Rouge, Cypress Bayou, and White Bayou.

New bridges will be built along LA 964, 19 and 67 where they meet the diversion channel, in addition to the reconstruction of the Geaux Geaux Bridge near Zachary. Low-flow augmentation pumps at the intercepted streams and an earthen closure at Brooks Lake and clearing and snagging of the Bayou Baton Rouge, White Bayou and Cypress Bayou north of the diversion channel will reduce flooding in those areas.

The biggest challenge was obtaining the financing, Richardson said. The project had been discussed for nearly three decades, but could not move forward without federal funding, which came last year after years of false starts — an issue that was referenced by several speakers at the groundbreaking ceremony in April.

"Today's groundbreaking is a true groundbreaking as funding exists to complete the entire project," said U.S. Rep. Cedric Richmond, whose 2nd District includes Baton Rouge. "Comite will help many people protect their property, but it alone does not solve our flood protection issues. I will continue working with all stakeholders until everyone in Louisiana receives the flood protection they deserve."

Gov. John Bel Edwards also referenced the frustration over the long wait for the "historic event."

"Today has been a long time coming, and I'm grateful that we have begun to get the important work of protecting this area from future flooding underway," Edwards said. "It took a lot of hard work, but today's groundbreaking is an example of local and state lawmakers working alongside our congressional delegation to help provide much-needed relief to those residents living near the Comite.

"In addition, it will help reduce water levels in other areas that are prone to continuous flooding. I'm excited about getting to this point, and it has energized us to continue fighting for other important flood mitigation projects like this one."

Other challenges of the project include digging the channel itself, in addition to pipeline relocations, Richardson said.

Preliminary work began in February 2019, and construction is expected to be completed summer 2021, weather permitting.

CEG


Lori Tobias

Lori Tobias is a journalist of more years than she cares to count, most recently as a staff writer for The Oregonian and previously as a columnist and features writer for the Rocky Mountain News. She is the author of the memoir, Storm Beat - A Journalist Reports from the Oregon Coast, and the novel Wander, winner of the Nancy Pearl Literary Award in 2017. She has freelanced for numerous publications, including The New York Times, The Denver Post, Alaska Airlines in-flight, Natural Home, Spotlight Germany, Vegetarian Times and the Miami Herald. She is an avid reader, enjoys kayaking, traveling and exploring the Oregon Coast where she lives with her husband Chan and rescue pups, Gus and Lily.


Read more from Lori Tobias here.





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