Cobbossee Watershed District employee Ryan Burton, left, and New England Milfoil employee Sam Dyer move a tote of milfoil onto Burton's boat to be ferried back to shore on Thursday in Annabessacook Lake in Monmouth.

The New England Milfoil team works near the Waugan Road boat launch on Thursday in Annabessacook Lake in Monmouth. Diver Cliff Cabral, left, pulls up the variable leaf milfoil from the bottom and it gets vacuumed up into the boat.

The New England Milfoil team works near the Waugan Road boat launch on Thursday in Annabessacook Lake in Monmouth.

This Thursday photo shows variable leaf milfoil in Annabessacook Lake in Monmouth.