The 13,000-acre Grand Lake St. Marys in western Ohio was sprayed with aluminum sulfate in April that was supposed to keep the blue-green algae from feeding on phosphorous in the water. A similar treatment was applied last year.

This year’s treatment was spoiled by high winds that helped stir phosphorus-rich mud from the lake bottom.

A report due in December is expected to raise questions about whether the state will fund a third treatment.

Toxic algae grow thick feeding on phosphorus in manure, sewage and fertilizers that rains wash into nearby streams. They produce liver and nerve toxins that can sicken people and kill pets.

The algae produce a nerve toxin that can sicken humans and kill pets and other animals.

The Lima News reports parts for the new 57-ton craft were unloaded last week at Grand Lake St. Marys State Park. The Ohio Department of Natural Resources says the crew hoped to have the boat ready to launch in a few days, but more work was needed to make the 67-foot-long craft operable.

The 12-inch suction dredge named “Brutus” will help remove silt that collects on the lake floor and is rich in phosphorus that feeds the algae blooms.