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Trowbridge Dam Area

 
Site Contact:
Brian Kelly
OSC

(kelly.brian@epa.gov)

Site Location:
837 26th Street
Allegan, MI 49010
 response.epa.gov/trowbridgedam

This website contains supporting information associated with a time critical removal action in the Trowbridge Township Dam Area, which is located in Area 4 of Operating Unit 5 (OU5) of the Kalamazoo River Superfund Site.

The project involves removal of PCB contaminated in-stream sediments and riverbank soils within an approximate 2.4 mile section of the river immediately upstream of the Trowbridge Township Dam (aka 26th Street Dam) in Trowbridge Township, Michigan.


26th St staging area preparation and stabilization (2021) Boat crew taking riverbank soil core sample Work crews taking river sediment cores via plastic tubes advanced by a pneumatic hammer. Land Rover conducting deep soil borings on the river banks Trowbridge Staging Area (TBSA) at 26th Street under construction (2024) SPA construction status - 10/24/2024 Crane Pad at TBSA on 26th Street Sheet piling installation along floodplain areas upstream of dam. Sheet pile installation in Subarea G Sheet pile installation in Subarea G Sheet pile installation with turbidity control (fixed boom) downstream of work area Sheet pile installation along shoreline View of Subarea E facing SW with sheet pile installed along the banks of Subarea F (left bank) and Subarea G (right bank) Water Treatment System under construction at the SPA. Hydraulic dredging unit assembly at staging area. Land clearing on RDB upstream of Trowbridge Dam in preparation for dredging. The 'Michael B' hydraulic dredge barge will remove wet sediment from the bottom of the river. Wet sediments will be processed, dried and temporarily staged at a Sediment Processing Area (SPA). All water will be treated to remove contaminants prior to return to the river. In-stream turbidity monitoring gauge to measure downstream water quality. Soil Processing Area (SPA), with Water Treatment System and 'geo-tube' bags filled with dredged sediment and water, which drain off to the containment pond prior to treatment. Soil Processing Area Mechanical dredging unit working around Osgood Drain confluence. Sunrise over the WTS at the SPA Perimeter air monitor downwind of work area.
For additional information, visit the Notices section.