Project record

Petaluma River FY2025 maintenance dredging

Aerial visualization of clamshell dredging, a material scow and survey support in the Petaluma River navigation channel

IMWO artist's impression of the published Petaluma River FY2025 maintenance dredging scope

San Francisco District records FY2025 Petaluma River maintenance dredging as complete. USAspending identifies The Dutra Group under USD 6,272,317 contract W912P725CA016 and reports three lower-tier records: Montezuma Wetlands for USD 715,053 of MWRP tipping fees, Woolpert for USD 84,189.18 of dredging quality management, surveys and tug setup, and Niemeth Pacific for USD 76,800 of crew boats. USACE published post-dredge surveys dated 22 October, 19 November and 11 December 2025 and a further condition survey from 19-21 June 2026.

Project signal

Completed in United States

Current status USACE records the FY2025 campaign complete after Dutra's USD 6.272 million dredging award; three reported subawards expose placement fees, DQM and survey support, tug setup and crew boats, while the final accepted quantity and account remain unpublished Source confidence Confirmed

Location

United States / Americas

Segment

Port infrastructure

Status

USACE records the FY2025 campaign complete after Dutra's USD 6.272 million dredging award; three reported subawards expose placement fees, DQM and survey support, tug setup and crew boats, while the final accepted quantity and account remain unpublished / Confirmed

Last checked

11 August 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, San Francisco District, with the City of Petaluma as non-federal sponsor
Delivery parties
The Dutra Group - prime dredging contractor under W912P725CA016, Montezuma Wetlands LLC - reported USD 715,053 subaward for MWRP tipping fees, Woolpert, Inc. - reported USD 84,189.18 subaward for dredging quality management, surveys and tug setup, Niemeth Pacific, Inc. - reported USD 76,800 subaward for crew boats, Other marine plant, transport, testing and placement parties - not identified in the cited records
Contract route
USACE San Francisco District planned an unrestricted clamshell procurement for approximately 200,000 cubic yards in its March 2025 navigation programme. A firm-fixed-price USAspending profile places W912P725CA016 with The Dutra Group at USD 6,272,317 from 28 August to 7 December 2025. The profile reports three subawards but does not publish the complete bid schedule, certified payment ledger or final account.
Execution window
Dutra's award period runs from 28 August to 7 December 2025. USACE lists post-dredge survey dates on 22 October, 19 November and 11 December 2025, marked the FY2025 campaign complete in its 20 February 2026 project update, and published a 19-21 June 2026 condition survey. Those records establish completion and subsequent monitoring, not the final measured quantity or payment date.
Works package
Maintenance dredging of the federal Petaluma River navigation channel. The authorized geometry is 200 feet wide at minus 8 feet MLLW across the flats, 100 feet wide at minus 8 feet MLLW through the river channel to Western Avenue, and a 300- to 400-foot turning basin at minus 8 feet MLLW. The March 2025 procurement plan carried a 200,000-cubic-yard clamshell baseline. The cited completion record does not publish the final pay quantity, dredge name, scow count or placement-volume split.
Marine interfaces
The campaign connected shallow-draft channel access, clamshell excavation, material transport, dredging quality management, hydrographic control, tug setup, crew-boat support and placement logistics. The City of Petaluma is responsible for a suitable upland placement site, while the reported Montezuma Wetlands fee record exposes an additional restoration-site commercial interface without defining the accepted volume.
Commercial evidence boundary
The prime award is USD 6,272,317. The three reported subawards total USD 876,042.18, but that sum is neither a complete subcontract account nor proof of payment. It should not be used to infer Dutra's self-performed share. The USD 715,053 Montezuma line is described as tipping fees, not as a dredging, transport or restoration-construction subcontract.

Contract and delivery chain

Named roles and open packages

Named appointments are shown against the workstream they cover. Unallocated packages remain open until a project source identifies the responsible party.

Prime dredging contract

W912P725CA016 FY2025 Petaluma River maintenance dredging

Named party
The Dutra Group
Status
Confirmed
Source position
USAspending identifies Dutra as prime and reports a USD 6,272,317 award period from 28 August to 7 December 2025. Source
Placement-site fees

MWRP tipping fees

Named party
Montezuma Wetlands LLC
Status
Confirmed
Source position
USAspending reports a USD 715,053 subaward dated 7 November 2025. The description establishes fees but no accepted volume or complete placement route. Source
DQM, survey and tug setup

DQM, surveys and tug setup

Named party
Woolpert, Inc.
Status
Confirmed
Source position
USAspending reports a USD 84,189.18 subaward dated 8 October 2025. Source
Crew-boat support

Crew boats

Named party
Niemeth Pacific, Inc.
Status
Confirmed
Source position
USAspending reports a USD 76,800 subaward dated 6 October 2025. Source
Completion and survey

FY2025 completion, post-dredge hydrography and 2026 condition monitoring

Named party
U.S. Army Corps of Engineers, San Francisco District
Status
Confirmed
Source position
USACE marks FY2025 maintenance dredging complete and lists October-December 2025 post-dredge surveys plus a June 2026 condition survey. Source

Project timeline

Material developments

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

Open this project in the Change Log

USACE completed a post-campaign condition survey

The 19-21 June survey extends monitoring beyond the FY2025 closeout but does not itself publish a maintenance finding or new work requirement.

Source

USACE marked FY2025 maintenance dredging complete

The district's project page closes the field campaign at programme level while leaving final quantity, placement split and account unpublished.

Source

The final listed post-dredge survey date passed

USACE groups surveys from 22 October, 19 November and 11 December 2025 as post-dredge hydrography across 37 sheets.

Source

The third reported lower-tier record entered USAspending

Montezuma Wetlands tipping fees joined Woolpert's DQM, survey and tug-setup scope and Niemeth Pacific's crew-boat scope, exposing USD 876,042.18 of reported lower-tier value.

Source

Dutra's Petaluma River contract started

USAspending records the USD 6,272,317 prime award; the earlier USACE procurement plan had used a 200,000-cubic-yard clamshell estimate rather than a certified final quantity.

Source

Evidence gap

What remains unverified

Outstanding evidence

  • Final measured and accepted dredged quantity
  • Actual placement-volume split between upland and beneficial-use routes
  • Dredge, scows, tugs and survey plant assigned to the completed campaign
  • Contract modifications, certified payments and final account
  • Interpretation of the June 2026 condition survey against authorized geometry
  • New shoaling, navigation restrictions and timing of the next maintenance cycle
  • Additional named lower-tier parties or corrected subaward records

Related records 2

Reporting status

Completed, confirmed confidence

Last checked 11 August 2026 across 5 cited sources. The dated timeline above carries the project events.

Last checked 11 August 2026 Cited sources 5

Sources and related records

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Source collections

Project sources 5