Project Information

Bid Title

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

Issuing Agency

Sammamish Plateau Water

Location

Washington

Published Date

Mar 8, 2026

Closing Date

Apr 7, 2026

Government Level

State & Local

Status

Closed

Ref. #

SW-C2023A

Original Source

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Project Description

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.

Commodity Codes

• NAICS 237990Other Heavy and Civil Engineering Construction
• NAICS 541620Environmental Consulting Services

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