Case Study: Weed Harvesters Offer a Solution to Aquatic Plant Problems in the Bay
BACKGROUND INFORMATION
4945-acre bay within Green Bay, extending across the Door County Peninsula
Bay is artificially linked to Lake Michigan with a shipping canal
Substantial activity from commercial and recreational watercraft
Home to 4 marinas and 2 yacht clubs with 750 boat slips & about 80 moorings
Port is home to a major ship building and repair facility and a Coast Guard Station
PROJECT CHALLENGE
Aquatic plants, both native and invasive species, are abundant in the Bay
Curly-leaf pondweed and Eurasian watermilfoil found to be quite widespread
Naturally occurring floating plant material captured around boats and slips
Abundance of floating vegetation quickly fills harvester requiring two unloading sites
Runoff from lawn fertilizers contributes to aquatic plant growth
THE SOLUTION
Using Weed Harvesters, The City of Sturgeon Bay cuts and removes aquatic plants from over 116-acres in the Bay.
From May through August, Harvesters cut navigational paths, collect floating weeds and service mooring fields and marinas.
In 2022, the fleet of equipment removed 1,621 loads of aquatic vegetation. The nutrient rich vegetation was taken to local homes and farms to be used as fertilizer. The phosphorus contained in the harvested vegetation has the potential to produce 607 tons of algae.