Project record

St. Joseph Harbor 2026 dredging and sediment-placement research

Aerial view of St. Joseph Harbor where the St. Joseph River enters Lake Michigan between long harbor piers

U.S. Army Corps of Engineers via Wikimedia Commons, public domain

USACE Detroit District's 2026 St. Joseph Harbor campaign combines a bounded federal-channel maintenance contract with an ERDC field experiment measuring turbidity, bathymetry, sediment movement, and shoreline response. Viking Marine Construction is scheduled to hydraulically dredge about 83,000 cubic yards and pump the material to a perpendicular nearshore placement about half a mile south of the harbor.

Project signal

Construction in United States

Current status Outer harbor dredging and ERDC placement monitoring active Source confidence Confirmed

Location

United States / Americas

Segment

Port infrastructure

Status

Outer harbor dredging and ERDC placement monitoring active / Confirmed

Last checked

17 July 2026

Coverage

Related sectors

Port infrastructure is the primary work classification. Related sectors connect this record to adjacent marine delivery and market coverage.

Subject index

Related subjects

These subject pages bring together related projects, technical articles, reports, and evidence methods.

Project anatomy

Contract scope and delivery roles

Client / authority
U.S. Army Corps of Engineers, Detroit District
Delivery parties
Viking Marine Construction, USACE Engineer Research and Development Center (research monitoring)
Contract route
Federal navigation maintenance dredging contract paired with an ERDC sediment-placement research programme
Execution window
Early July through the end of August 2026
Works package
Hydraulic dredging of approximately 83,000 cubic yards from the federal navigation channel and pipeline placement about half a mile south of the harbor
Marine interfaces
Federal channel maintenance, submerged-pipeline transfer, nearshore sediment placement, turbidity monitoring, hydrographic survey, sampling, and wave-driven sediment movement
Commercial evidence boundary
A bounded maintenance campaign with a research placement method; the reviewed release does not state the contract value

Project timeline

Material developments

Dated events that changed scope, counterparties, delivery, commissioning or operating status.

Open this project in the Change Log

USACE announced the 2026 dredging and research campaign

Viking Marine was due to dredge about 83,000 cubic yards and pump it to a perpendicular nearshore placement south of the harbor. The release set the July-August work plan and monitoring method; final volumes, channel condition, and shoreline response still need field results.

Source

The 2025 campaign set the baseline for two-season monitoring

USACE paired a smaller, roughly 22,000-cubic-yard outer-harbor campaign with ERDC monitoring planned across 2025 and 2026. That earlier along-shore placement is the comparison case for the new perpendicular geometry; it is not evidence of the 2026 contractor's output.

Source

Evidence gap

What remains unverified

Outstanding evidence

  • Actual mobilisation and dredging completion by the end-August window
  • Surveyed volume removed from the federal navigation channel
  • Placement geometry and pipeline operations about half a mile south of the harbor
  • Turbidity, bathymetry, sampling, drone, and land-video monitoring results
  • Post-placement movement under Lake Michigan wave conditions
  • Shoreline response, erosion or accretion, and any channel-infill consequence
  • Regulatory and Federal Standard treatment of any future repeat placement
  • Owner decision on replication, adaptation, or return to along-shore placement

Related records 2

Reporting status

Construction, confirmed confidence

Last checked 17 July 2026 across 6 cited sources. The dated timeline above carries the project events.

Last checked 17 July 2026 Cited sources 6

Sources and related records

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Source collections

Project sources 6