State Parks Project – Lagoon, Shoreline, and Stream Restoration at Twanoh State Park

Location: Washington
Posted: Mar 8, 2026
Due: Apr 7, 2026
Agency: Sammamish Plateau Water
Type of Government: State & Local
Category:
  • F - Natural Resources and Conservation Services
  • Z - Maintenance, Repair or Alteration of Real Property
Solicitation No: SW-C2023A
Publication URL: To access bid details, please log in.
Project: State Parks Project – Lagoon, Shoreline, and Stream Restoration at Twanoh State Park
Ref. #: SW-C2023A
Department: Washington State Parks and Recreation Commission
Type: ITB
Status:
Open
Open Date: Mar 6th 2026, 1:00 PM PST
Questions Due Date: Mar 20th 2026, 1:00 PM PDT
Contact Information: Deana Bishop, deana.bishop@parks.wa.gov
Close Date: Apr 7th 2026, 1:00 PM PDT

Project Description: This project includes removing a concrete bulkhead, expanding an existing saltwater lagoon, constructing a tidal channel, re-planting salvaged native vegetation around the fringe of the new lagoon. The project also includes removing existing riprap and several trees along the shoreline and streambanks; naturalizing the shoreline by installing large woody debris, bioengineered softshore armoring and a deformable gravel berm; performing work within Twanoh Creek that includes expanding the floodplain, installing clusters of large woody debris within the stream and floodplain, removing and replacing a pedestrian bridge and abutments, and installing bioengineered streambanks.


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