Public Works

6300 Southcenter Blvd.,
Tukwila, WA 98188

Phone: 206 433-0179
Fax: 206 431-3665

Email the Public Works Dept.

Riverton Flapgate Removal Project

Project Overview

Remove two culverts and flap gates that confluence with the Duwamish River; daylight creek, install trail bridge over creek, habitat improvements and planting for 1,200 lineal feet of creek, inc 1/4 acre backwater wetland habitat and 400 ft of river; associated structural improvements for TIB roadway and adjacent commercial property. The objective is to increase available salmonid rearing habitat and increase flood refuge in lower Duwamish River and improve fish access to Riverton Creek and enhance salmon rearing and resting area.


Project Status Update


2021 was the year in which Riverton Creek was removed from the pipes that had connected it with the Duwamish River for more than 50 years. This fall, adult salmon have been seen swimming in the creek and the hope is that juvenile salmon will benefit from this restored connection to access off-channel habitat prior to heading out to sea by feeding, growing and adapting to their saltwater future.  The project is now substantially complete.  The new bridge has been installed and the trail is open.  The Contractor is finishing up some items including fencing and landscaping.  Artist Sarah Kavage completed an amazing water-oriented and multi-lingual mural along the wall adjacent to the trail.  More of Sarah’s creative expressions are slated for the coming months.


Contact Information

For specific questions, contact Mike Perfetti at 206-433-7192 or email at



Project Photos