Product: Geotube® Marine Structures Technology
Application: Diversion Dikes
Location: Red Eye Crossing, Baton Rouge, Louisiana
Heavy silt deposits and sediment build-up in the Mississippi River can disrupt shipping channels and deep water, oceangoing vessels. The Red Eye Crossing area of the River, a frequent trouble zone just south of Baton Rouge, suffered from deposit sediment problems. The Corps of Engineers often dredges the channel to insure it is deep enough. A plan of action was needed to reduce silt buildup in the shipping channel and also reduce dredging costs for this area.
Geotube® marine containment technology was selected for this diversion dike project. The purpose of the dikes at Red Eye Crossing was to narrow (contract) the channel to a width where the river flow would prevent sediment from dropping out of suspension and to reduce dredging in the area.
38,000 Geobag® units were mechanically filled with dredged river sand using the hopper method [photo 2]. These bags were placed at a depth up to 66 feet [photos 3-4]. Additionally, 550 Geocontainer® units were used in the construction of underwater dikes. These containers were filled with 500 cubic yards of dry sand [photos 5-6]. They were sewn closed by hand-held equipment. The units were then deployed through the bottom of a split-hull barge [photo 7]. A total of six structures were constructed for sedimentation control.
The series of diversion dikes effectly narrowed the River, increasing velocity and dramatically reducing silt dropout and the need for constant channel dredging [photo 8]. This was a good example of successful engineered channel improvement.