Zebra Mussel Sightings Elsewhere

From January 31, 1991 (update #6)

CHICAGO Several sightings of zebra mussels south of Chicago near the boundary of the Lake Michigan and Mississippi River drainage basins were reported by Irwin Polls of Chicago's Metropolitan Water Reclamation District. A single zebra mussel was found in a recently examined sediment grab sample taken in April 1989 from the Chicago Sanitary and Ship Canal. Broken zebra mussel shells were collected during July 1990 in a sample 7-8 miles downstream from Lake Michigan. A recent survey of area marinas revealed that zebra mussels had been found on boats docked in the same area. The mussels were also found on the Paul R. Dickinson, a Lake Erie tugboat being repaired at a South Chicago dry dock.

HOLLAND, Mich. Small numbers of zebra mussels about 3/4-inch long were found attached to the water intake of the Holland Water Utility during an inspection by divers in early November, according to utility superintendent Bill Lambers. Most of the mussels were found at pipe joints from the shoreline to 700 feet out, Lambers said. No mussels were found on the intake crib or in the first thousand feet of intake pipe closest to the crib.

MUSKEGON, Mich. Two reports of zebra mussels attached to recreational boats were filed last fall as the boats were being removed from Muskegon Lake at local marinas, according to Michigan Sea Grant District Extension Agent Charles Pistis. About a half-dozen inch-long mussels were found on a boat that reportedly never left the lake all summer. A single mussel was found by a charter fishing captain cleaning his boat's hull. These sightings were the most northerly sightings to date of zebra mussels along Lake Michigan's east shore.

ID: 19910131-3.

The Zebra Mussel Update was a 4- to 8-page quarterly national newsletter published by the University of Wisconsin Sea Grant Institute from May 1990 through May 1997. The ZMU documented the spread of the zebra mussel -- an exotic nuisance mussel -- through North America's freshwater environments, especially the Great Lakes, and on efforts to control it.