Is salvinia a threat to city water source?

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Jarrett Thaxton, Technical Supervisor with the La. Dept. of Wildlife and Fisheries, lands his boat after spraying the salvinia on the north side of the Oak Grove Bridge Tuesday, Aug. 22. A second boat operated by the City of Natchitoches sprayed the main area of lake including all the “hidey-holes” between the bridge and TGT plant Tuesday morning also. Thaxton said the salvinia was especially bad because this year’s cool and cloudy summer is conducive to the plants growth. He said between now and October is the growing season. Times Photos

“The salvinia problem on Sibley Lake has increased significantly just over the last month.  This is due to the higher than normal precipitation that we have received throughout August that has flushed vegetation from some of the private ponds adjacent to Sibley Lake and upstream of the Oak Grove Bridge and the area upstream of the gas plant.  Most lakes within this area are experiencing this same problem now.Treatments by both the LDWF and the City of Natchitoches have been underway and increased over the last two weeks to control any expansion into the main lake.  To date this year, the Department alone has treated 85 acres of giant

Treatments by both the LDWF and the City of Natchitoches have been underway and increased over the last two weeks to control any expansion into the main lake.  To date this year, the Department alone has treated 85 acres of giant salvinia on Sibley Lake, primarily in the Oak Grove area.  Our 1 crew plans to be back within this area on Tuesday this week.We do expect with the current and future treatments along with drier conditions that

We do expect with the current and future treatments along with drier conditions that salvinia coverage will begin to decrease in both of these upper tributaries as it has in the past.  The lower end where the potable water intake is located has never had a salvinia issue due to the open conditions where salvinia cannot remain still due to open water, wave action or current through the spillway.”Villis Dowden, Biologist Manager LDWF Inland Fish Dist 10

Villis Dowden, Biologist Manager LDWF Inland Fish Dist 10

Salvinia has long been a problem in area lakes, and recently the issue has expanded to include Sibley Lake, the water source for the City of Natchitoches.
LDWF and the City are working together in attempts to contain the invasive plant.