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Public comment period for proposed new diked area on Neebish Island, Chippewa County

2026-07-15T08:00:00 2026-08-12T17:00:00 Public comment period for proposed new diked area on Neebish Island, Chippewa County

The Department of Environment, Great Lakes, and Energy (EGLE) has received a water quality certification request pursuant to Section 401 of the Clean Water Act and a Federal Consistency Determination under Section 307 of the Federal Coastal Zone Management Act (CZMA) from the U.S. Army Corps of Engineers (USACE), Detroit District, regarding the proposed construction of an approximately 20-acre diked area for dredged material containment at the Dredged Material Placement Site (DMPS), located at the Rock Cut on the west side of Neebish Island adjacent to the downbound federal navigation channel in the St. Marys River. The dikes for the new containment area will be constructed of crushed, sorted shot rock excavated from the river to create the downbound channel in the 1920s and during subsequent deepening projects, and stockpiled at the DMPS. Dike construction will occur in two phases.

The first phase involves construction of crushed rock dikes approximately 20 feet high enclosing the 20-acre containment area. This area will be used for placing dredged material until it is filled, which is expected to occur after approximately three dredge cycles. In the second phase, an interior ring of 20-foot-high dikes will be constructed inside the perimeter of the first dikes and on top of the filled area to create additional containment capacity. The top of the dikes constructed in the second phase will be approximately 40 feet above existing grade. The total volume of crushed rock used in the two-phase project is approximately 370,000 cubic yards. The total dredged material containment capacity of the two-phase project is estimated to be about 900,000 cubic yards, or the anticipated volume of dredged material from five dredge cycles.

EGLE is reviewing the proposed activity for compliance with Michigan’s water quality requirements pursuant to Section 401 of the CWA and consistency with Michigan’s Coastal Management Program pursuant to Section 307 of the CZMA.

Written comments must be submitted by 5:00 p.m. August 12, 2026, to:

  • Icons.Email Matt Smar at SmarM@Michigan.gov or
  • Icons.Edit EGLE, Water Resources Division, P.O. Box 30458, Lansing, Michigan, 48909-7958.

All comments will be provided to the USACE.

About certification under Section 401 of the federal Clean Water Act

Under Section 401 of the federal Clean Water Act, EGLE reviews federal permit and license applications for projects that may result in a discharge to Michigan’s waters of the United States. The purpose of the review is to determine whether EGLE can certify that the project will comply with Michigan’s water quality requirements. 

The federal agency cannot issue the permit or license unless EGLE either grants or waives water quality certification. EGLE may require special certification conditions that the federal agency must incorporate into the permit or license. The federal agency cannot issue the permit or license if EGLE denies water quality certification for the project.

About certification under Section 307 of the federal Coastal Zone Management Act

Under Section 307 of the federal Coastal Zone Management Act, EGLE reviews federal agency activities within Michigan’s Coastal Zone Boundary that may impact coastal resources and uses. The purpose of the review is to determine whether the proposed activity complies with a range of Michigan’s resource protection statutes and rules. 

Event Date

Start: July 15, 2026 8:00 AM

End: August 12, 2026 5:00 PM

The Department of Environment, Great Lakes, and Energy (EGLE) has received a water quality certification request pursuant to Section 401 of the Clean Water Act and a Federal Consistency Determination under Section 307 of the Federal Coastal Zone Management Act (CZMA) from the U.S. Army Corps of Engineers (USACE), Detroit District, regarding the proposed construction of an approximately 20-acre diked area for dredged material containment at the Dredged Material Placement Site (DMPS), located at the Rock Cut on the west side of Neebish Island adjacent to the downbound federal navigation channel in the St. Marys River. The dikes for the new containment area will be constructed of crushed, sorted shot rock excavated from the river to create the downbound channel in the 1920s and during subsequent deepening projects, and stockpiled at the DMPS. Dike construction will occur in two phases.

The first phase involves construction of crushed rock dikes approximately 20 feet high enclosing the 20-acre containment area. This area will be used for placing dredged material until it is filled, which is expected to occur after approximately three dredge cycles. In the second phase, an interior ring of 20-foot-high dikes will be constructed inside the perimeter of the first dikes and on top of the filled area to create additional containment capacity. The top of the dikes constructed in the second phase will be approximately 40 feet above existing grade. The total volume of crushed rock used in the two-phase project is approximately 370,000 cubic yards. The total dredged material containment capacity of the two-phase project is estimated to be about 900,000 cubic yards, or the anticipated volume of dredged material from five dredge cycles.

EGLE is reviewing the proposed activity for compliance with Michigan’s water quality requirements pursuant to Section 401 of the CWA and consistency with Michigan’s Coastal Management Program pursuant to Section 307 of the CZMA.

Written comments must be submitted by 5:00 p.m. August 12, 2026, to:

  • Matt Smar at SmarM@Michigan.gov or
  •  EGLE, Water Resources Division, P.O. Box 30458, Lansing, Michigan, 48909-7958.

All comments will be provided to the USACE.

About certification under Section 401 of the federal Clean Water Act

Under Section 401 of the federal Clean Water Act, EGLE reviews federal permit and license applications for projects that may result in a discharge to Michigan’s waters of the United States. The purpose of the review is to determine whether EGLE can certify that the project will comply with Michigan’s water quality requirements. 

The federal agency cannot issue the permit or license unless EGLE either grants or waives water quality certification. EGLE may require special certification conditions that the federal agency must incorporate into the permit or license. The federal agency cannot issue the permit or license if EGLE denies water quality certification for the project.

About certification under Section 307 of the federal Coastal Zone Management Act

Under Section 307 of the federal Coastal Zone Management Act, EGLE reviews federal agency activities within Michigan’s Coastal Zone Boundary that may impact coastal resources and uses. The purpose of the review is to determine whether the proposed activity complies with a range of Michigan’s resource protection statutes and rules. 

Learn more about requirements under Section 401