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Chemical treatment of Lake Opechee milfoil set for July 15

LACONIA — Almost 22 acres of Lake Opechee — 16.55 acres at the northeast corner and 5.25 acres below the Lakeport Dam — will be treated with a chemical herbicide to control the growth and spread of invasive milfoil. Weather and conditions permitting, the treatment will be undertaken on Tuesday, July 15.

Aquatic Control Technology of Sutton, Massachusetts, the same firm that has treated the lake in recent years, will apply the herbicide as well as deploy divers to harvest remaining plants by hand.

Altogether, the treatment is projected to cost $22,435, of which the the New Hampshire Department of Environmental Services will contribute 40 percent, or $8.974. The remainder of the cost will be shared evenly between the city and Lake Opechee Preservation Association, with each contributing $7,702.50.

For the 24 hours following the treatment there will be no swimming within 200 feet of the treated areas. The lake water should not be used for drinking or irrigation until further notice. This restriction applies to intakes within 1,200 feet and wells within 50 feet of the treated areas.

For any questions or further information, contact Marc Bellaud at Aquatic Control Technology, ( 508) 865-1000 or This email address is being protected from spambots. You need JavaScript enabled to view it.

 
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