In cooperation with a June 12, 2025 resolution passed by the Grant Parish Police Jury requesting to limit drawdowns at Iatt Lake to four feet, the Louisiana Department of Wildlife and Fisheries (LDWF) and the Louisiana Department of Transportation have scheduled a four-foot drawdown for Iatt Lake in Grant Parish to help with the control of the invasive plant, giant salvinia.
The water control structure will be opened on or about July 14, 2025. The lake should dewater at a rate of three to four inches per day until it reaches four feet below pool stage. It will be maintained at this level, if possible, until October 6, 2025.
Drawdowns are timed to take advantage of prevalent late summer, fall, and winter weather patterns. If favorable weather patterns do not occur, the effectiveness of the drawdown is reduced. For this reason, some drawdowns are very successful, while others can be less effective.
During the drawdown, boaters may still access the waterbody at the Iatt Lake dam launch, but caution is advised, as numerous obstructions that are normally not seen may become hazards.
For further information about Iatt Lake, please see the management plan at https://www.wlf.louisiana.gov/resources/category/freshwater-inland-fish/inland-waterbody-management-plans or contact Shelby Richard, LDWF Biologist Manager, at (318) 487-5352 or srichard@wlf.la.gov.
