U.S. Army Corps of Engineers Duluth Harbor and St. Louis River AOCs

GLEC was retained on behalf of the USACE-Detroit District to conduct vibracore sediment sampling at the St. Louis River, Great Lakes Legacy Act (GLLA) Duluth Harbor Area of Concern. Over 1,200 feet of four-inch diameter vibracore sediment cores were collected; 584 cores were collected from 268 locations.  This work was conducted both on the ice (during March 2010) and on GLEC’s 26-foot work boat during October and November 2010, and May through June 2011.




John Barkach

Senior Program Manager
Phone: 248-538-0900


GLEC operates one of only a few U.S. laboratories accredited for whole sediment toxicity testing. GLEC also maintains NELAP accreditation for chlorophyll and nutrient chemistry testing.

Great Lakes Environmental Center

739 Hastings Street
Traverse City, MI   49686

Phone: (231) 941-2230
Fax: (231) 941-2240