Cascade Water Alliance has awarded a contract for milfoil treatment in Lake Tapps to Aquatechnex, who will provide aquatic management and milfoil eradication and control services.

Treatment will begin on identified areas Monday.

Eurasian Water milfoil is a non-native, invasive aquatic plant that spreads rapidly, crowds out native plants and forms dense surface mats in Lake Tapps, noted Jon Shimada, Cascade’s Capital Projects Director.

“If the milfoil is not contained or controlled, it will pose a serious threat to this lake. Lake Tapps is approximately 2,500 acres and the maximum treatment area at this time is approximately 400 acres,” Shimada said.

Plans announced in May call for the use of Fluridone, a “slow-acting systemic herbicide.” The chemical was chosen because it is not dangerous to humans and pets and no restrictions on swimming, fishing, drinking or pets will be placed on residents.

After an initial dosing with the chemical, designed to slowly root out and destroy the milfoil, cascade will continue to monitor the lake and re-dose if necessary.

The State Department of Ecology requires a 10-day notice period per treatment application. McNabb said that notice period will begin this week. In addition, homeowners in affected areas will be notified at their property that treatment will be done.

For specific information about treatment activities, visit www.tappsmilfoil.wordpress.com.