Clarification Statement Final Environmental Statement Maintenance Dredging Of The Federal Navigation Channels In The Saginaw River And Saginaw Bay Michigan PDF Download

FINALENVIRONMENTAL STATEMENT MAINTENANCE DREDGING OF THE ,«FEDERAL NAVIGATION CHANNEL AT MONROE HARBOR, MICHIGAN Prepared by:U..S. Army Engineer District Detroit, Michigan 1976 JULYSUMMARY .MAINTENANCE DREDGING OF THE FEDERAL NAVIGATION CHANNELATMONROE HARBOR, MICHIGAN ( ) DRAFT (X) FINAL ENVIRONMENTAL STATEMENT RESPONSIBLE OFFICE: U.S. ARMY ENGINEER DISTRICT, DETROITCORPS OF ENGINEERSP.O. BOX 1027DETROIT, MICHIGAN A8231.TELEPHONE: (313) 226-6752 1. NAME OF ACTION: (X) ADMINISTRATIVE ( ) LEGISLATIVE 2. , DESCRIPTION OF ACTION: Maintenance dredging of'Monroe Harbor,Michigan is normally performed annually during Aptil and Mayfor a period of about 1 1/2 months. Approximately 230,000 cubic yards of sediments will be dredged annually for the next 3-5 years until the area la filled. Once the site is filled, no further dredging will be done until another suitable disposal site is found and an environmental ' impact statement is prepared on the confined disposal site discharge location. This material has been classified as polluted and will be placed in a confined disposal facility to prevent the re-entry of contaminants into the aquatic system. The matetial is removed from a navigation channel and turning basin that ib approximately 5.5 miles in length; extending from the 21-foot water depth in Lake Erie to a point about 1.6 miles upstream of the mouth of the River Raisin. The disposal site is a AO acre diked area owned by the Detroit Edison Power Company located at the mouth of the River Raisin. 3. (A) ENVIRONMENTAL IMPACTS: The harbor dredging action will temporarily degrade water quality. The disposal of the polluted material into the confined disposal facility will convert the nowponded, former lake-shoal area Into a terrestrial environment. Commercial navigation requires maintenance dredging of the channel and harbor area for Immediate continued use. The proposed actions would: (1)-render a partial pollution abatementfunction through the removal of polluted sedime