Aquatic herbicide treatments were carried out on August 5, 2014 in areas outlined below. Please refer to maps and water use restrictions below for additional information about these treatments. No further treatments will be carried out in this area.
Water use restrictions are no longer in effect. All water uses can resume.
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.
For information related to the aquatic herbicides that will be used, Aquathol K and DMA 4 IVM, please go to the following link where the herbicide label and Material Safety Data Sheets are available for review: http://www.cleanlake.com/2014lakecdatreatments.html
Areas within solid green lines were treated with aquatic herbicides for Eurasian watermilfoil on August 5, 2014.
Areas highlighted with a green border no longer have water use restrictions assocaited with them.
No futher water use restriction updates will be provided as all water uses can resume.
Yellow Polygons - Planned treatment and water use restriction area
Red Polygons - Treated and water use restriction area
Green Polygons - Treated area with no water use restriction