NOTICE OF 2014 COEUR D’ALENE LAKE EURASIAN WATERMILFOIL TREATMENTS
Dear property owners and lake users,
An aquatic herbicide application is planned for portions of Southern Coeur d’Alene Lake between August 4 and August 6, 2014, weather permitting. Up to 83 acres of the lake will be treated with liquid 2,4-D (DMA 4 IVM, EPA Registration # 62719-3) and liquid endothall (Aquathol K, EPA Registration # 70506-176).
Certain water use restrictions will be in effect for households using lake water located up to 600 feet from treatment areas for at least 12 days depending on herbicide residues. The following water use restrictions apply:
- Potable Water: Functioning potable water intakes must be turned off until the 2,4-D levels are determined to be 0.07 parts per million (ppm) or less by laboratory analysis and endothall levels are 0.1 parts per million (ppm) or less by laboratory analysis.
- Irrigation: Treated water may not be used for irrigation until 2,4-D levels are determined to be 0.1 parts per million (ppm) or less by laboratory analysis (immunoassay). There is no restriction on use of water from the treatment area to irrigate established grasses.
- Recreational Use of Water in treatment Area: There are no restrictions on use of water in the treatment area for recreational purposes, including swimming and fishing.
- Animal Consumption: Do not intentionally use water from the treated area for animal consumption until laboratory analysis indicates that restrictions are lifted. This does not apply to incidental exposure of animals to treated water.
Home owners near treatment areas who use water from the lake for drinking or irrigation are advised to not use lake water until herbicide residue samples indicate that levels in the water are within acceptable use levels specified by the herbicide label. For up to date information on water use restrictions please visit the applicator’s website. http://www.cleanlake.com/2014lakecdatreatments.html
Contact Ben Scofield, Water Resources Specialist with the Coeur d’Alene Tribe’s Lake Management Department (208-686-6206) or David Armes, Terrestrial Resource Specialist, Avista (509-495-2796), with any questions.
