Dredging & Beneficial Use

Duwamish links a USD 2.85m award to a 140,000 yd3 Elliott Bay route

Published 6 October 2026 Publisher IMWO Region Americas Confidence Confirmed
American Construction floating crane Mukilteo beside a material barge during an earlier Duwamish Waterway maintenance-dredging campaign

American Construction Company; FY2021 Duwamish project image used as historical dredging context, not FY2026 progress evidence

USACE awarded American Construction Co., Inc. USD 2,851,950 for Duwamish Waterway contract W912DW26CA038. Up to 140,000 cubic yards are planned from the turning basin and sections A and B, with continuous clamshell work no sooner than 1 December and material routed to the Elliott Bay open-water site. Contract formation is confirmed; mobilisation and field output remain unreported.

The award now has a contract number, price and material route

SAM.gov and the USACE DQM register report the 24 September award, contractor and USD 2,851,950 value. The 2 October Seattle District release sets out the planned quantity, locations, method, operating pattern and disposal route. The original solicitation lists a 15 February 2027 window, while the later release gives a 1 March in-water deadline; the issued contract or a later owner notice must reconcile the difference.

A compact award still carries three separate evidence ledgers

The package joins excavation in an active industrial waterway, barge transport and open-water placement. Each leg has its own acceptance evidence: hydrography for restored channel geometry, load and disposal records for Elliott Bay, and contract records for exercised options and payment. USACE also requires separation from fishing and crabbing gear and identifies ecological and tribal-fishing constraints behind the work window. Reporting the 140,000-cubic-yard ceiling as delivered volume would collapse those distinct controls into one unsupported number.

Evidence conclusion

Field evidence begins with mobilisation

The contract is ready for pre-mobilisation tracking, not production reporting. The public map distinguishes base and option areas, but neither public award source allocates quantity or price between them. American Construction's earlier Duwamish work and published floating-crane and dump-barge capability support a credible delivery profile, but they do not identify the plant assigned to W912DW26CA038. A dated mobilisation record, named plant or USACE work notice would establish the next status change; completion requires route-specific quantities, post-dredge survey and acceptance.

Outstanding evidence

  • Base and option line-item quantities and exercise status
  • Resolution of the 15 February and 1 March 2027 schedule boundary
  • Named clamshell crane, bucket, barges and tugs
  • Dated mobilisation and first production
  • Elliott Bay disposal loads and compliance record
  • Post-dredge hydrography, acceptance and final account

Related records 1

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