Other projects sponsored by the authority include the construction of a permanent saltwater barrier on the Neches River, a comprehensive water-quality management program, and the construction of boat ramps and other recreational facilities on area waterways.
[1] The LNVA system includes 400 miles (640 km) of canals covering a 700 sq mi (1,800 km2).
Up to 1×10^9 US gal/d (3.8×109 L/d) maximum[1] Prior to construction of the permanent barrier, the LNVA installed temporary barriers across Pine Island Bayou and the Neches River upstream of their confluence 36 times between 1940 and 2000, to prevent contamination of their waters from salt water.
The barrier, constructed between 2000 and 2003, prevents saltwater contamination during periods of low river flows.
[2] The barrier, over 1,000 feet long, includes a 650-foot-long overflow barrier; five forty-five foot wide tainter gates; and a fifty-six foot wide navigation lane regulated by two thirty-foot sector gates.