In an effort to control aquatic vegetation, the water control structure on Lake Bistineau near Minden will be opened Aug. 8 for a lake drawdown.
As a result of mild winter temperatures, experts say giant salvinia has expanded beyond the control capacity of herbicide applications and salvinia weevils. Louisiana Department of Wildlife and Fisheries survey estimates show giant salvinia coverage to be in excess of 2,000 acres.
The lake will be lowered seven feet below pool stage and will remain there until Jan. 31, 2013.
Boaters are urged to be cautious during the low water period as boat lanes will not provide normal clearance for underwater obstructions.