Aquatic Herbicide Applications for the control of Eurasian watermilfoil (EWM) took place at Hayden Lake on June 3, 2014.
Water samples collected on June 16, 2014 allow water use restrictions to be removed for Sportsman's Bay and Berven Bay. Water samples collected on June 18, 2014 allow water use restrictions to be removed for Mokins Bay. No further samples will be collected as all water use restrictions have been lifted.
TREATMENT SCHEDULE
An aquatic herbicide application to treat the aquatic noxious weed Eurasian watermilfoil is planned for Hayden Lake (Kootenai County, Idaho) and Cocolalla Lake (Bonner County, Idaho) between the dates of June 3rd and June 12th, 2014. The aquatic herbicides DMA 4 IVM (a liquid 2,4-D, EPA Registration # 62719-3) and Aquathol K (liquid endothall, EPA Registration #70506-176) will be applied to up to 100 acres in areas of Hayden Lake and up to 30 acres in Cocolalla Lake to control Eurasian watermilfoil. Irrigation and drinking water restrictions will be in effect in the area until herbicide residue levels in the water are within levels specified by the herbicide label. Home owners who use water from the lake for drinking or irrigation are advised to not use lake water until herbicide residue samples indicate it is acceptable to do so. Restrictions will be in effect for a minimum of 12 days and possibly more depending on residue results. For up-to-date information about treatment plans and water use restrictions visit the applicator’s website:www.cleanlake.com/2014idahoewmtreatments.html.Contact Tom Woolf, Idaho State Department of Agriculture, Aquatic Plant Program Manager, with any questions: 208-608-3404 or email atthomas.woolf@agri.idaho.gov.
NOTICE
WATER USE RESTRICTION AREA
An aquatic herbicide application is planned for areas of Hayden Lake between June 3rd and June 5th, 2014. DMA 4 IVM (a liquid 2,4-D, EPA Registration # 62719-3) and Aquathol K (liquid endothall, EPA Registration #70506-176) will be applied to up to 100 acres in areas of Hayden Lake to control Eurasian watermilfoil.
Water Use restrictions will be in effect for households utilizing water from the lake that are located up to ½ mile of treated areas for a minimum of 12 days and possibly more depending on herbicide residues. Refer to the applicator’s website below for up to date water use restriction information. Restrictions on water use will be as follows:
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 animalconsumption until laboratory analysis indicates that restrictions are lifted. This does not apply to incidental exposure of animals to treated water.
See the website below for a detailed map indicating where restrictions will be in effect. 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 about treatment and residue levels visit the applicator’s website at: www.cleanlake.com/2014idahoewmtreatments.html
Contact Tom Woolf, Idaho State Department of Agriculture, Aquatic Plant Program Manager, with any questions: 208-608-3404 or email at thomas.woolf@agri.idaho.gov.
Areas highlighted in green no longer have water use restrictions associated with them.
Legend
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
