The Grand and White Lakes system has been maintained
as a fresh-to-intermediate marsh environment. This has
been accomplished through water management using
natural ridges, levees, locks, and water control structures.
This project replaces the Humble Canal structure that has
fallen into disrepair. This project is compatible with the
overall basin strategy of treating critical areas of marsh
loss within the interior of the basin and managing water
levels with structures to relieve stress on interior wetlands.
The project also relieves this area from continued saltwater
intrusion from the Mermentau River that threatens the
viability of the fresh to intermediate marshes within the
The objective of this project is to restore historical
hydrology to the project area by constructing a water
control structure consisting of five 48-inch diameter by 50-
foot long corrugated aluminum pipes with flap gates and
weir drop inlets along with one 18-inch diameter
corrugated aluminum pipe with screw gate. This structure
will protect the area from Mermentau River saltwater
intrusion and allow high water to drain from the marsh to
the river. Dredging of a small waterway is included to
increase the effectiveness of the structure.
The project is located in the Mermentau basin, on the west
bank of the Mermentau River approximately 2 miles
southwest of Grand Lake at the Humble Canal in Cameron
Construction of the project was completed March 5, 2003.
The project is now in the operation and maintenance phase.
This project is on Priority Project List 8.
Federal Sponsor is NRCS
Local Sponsor is CPRA