Flint River Sediment Remediation East Boulevard Former MGP Site

Location Flint, Michigan
Contract Value $26,114,000
Period of Performance April 2017 – January 2019
Role Prime Contractor

History & Location

Located in Flint, Michigan, the Consumer Energy Company’s Flint East Boulevard Former MGP Site (the Site) is located on property owned by the University of Michigan–Flint, United States Postal Service, the City of Flint, and Consumer’s Energy Company. Remediation activities were executed adjacent to the Site, targeting a stretch of the Flint River impacted by coal-tar-contaminated sediments.

Significant Project Features

  • Mechanical dredging and dewatering of approximately 84,000 CY of sediments contaminated with coal-tar remnants (PAHs, VOCs, and heavy metals)
  • Effective amendment and stabilization of 56,000 CY of removed sediments
  • Placing approximately 115,000 tons of multi-layer cap material, to create an impermeable barrier, encompassing 1,900 ft. within the Flint River
  • Successful implementation of custom-fabricated equipment to place a subaqueous cap, with extremely low tolerances (+/-0.1 ft.), in a waterway with strong currents
  • Loadout and off-site transportation/disposal of stabilized sediments and soils
  • Achieved over 50K safe workhours without a lost-time incident
  • Site Restoration

Rooted in Remedial Construction
Expanded into Environmental Dredging

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