Skip to Main Content View Text-Only

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Suite 1000, Portland, OR 97204

I-5, SW Barbur, SW 26th Stormwater Management Project

When it rains, stormwater runoff from Interstate 5, SW Barbur Boulevard and SW 26th Avenue drains directly to Tryon Creek. Stormwater carries pollutants to the creek, and high runoff volume and velocities erode stream banks. This project will protect Tryon Creek water quality.

Construction is scheduled to begin in spring or summer 2014 on a series of terraced stormwater rain gardens at the intersection of I-5 and SW Barbur. The design includes a forebay that will collect sediments and some pollutants before the water enters the rain gardens. The rain gardens will slow stormwater flow and allow pollutants to settle out before the water enters the creek.

Terraced Rain Garden project map

For more information go to :

Construction Method

The contractor will use open excavation and a trenchless method on this project. Construction equipment will include a track hoe, crane, dump trucks, front loader, pavement saw, pavement roller, bypass pumps, generators and lights. See the map on the front for night work locations.

Noise Variances and Conditions

Environmental Services has applied for a noise variance to allow 20 days of non-consecutive night work between July 1, 2014 and September 30, 2014. Normal construction hours are 7:00 a.m. to 6:00 p.m. Monday through Saturday. Work after 6:00 p.m. and before 7:00 a.m. and all hours on Sundays requires a noise variance.

Comments, Questions or Concerns

Your comments regarding the proposed noise variance are valuable and can be submitted by letter, telephone or email.

Write to:

Portland Noise Office
1900 SW 4th Avenue, Room 5000
Portland,OR 97204
Telephone 503-823-7350

If you have questions or concerns about the project, contact Joe Annett at 503-823-2934 or Any noise-related comments will also be forwarded to the Noise Office.

Heartbleed Security Notice

A serious security vulnerability known as "Heartbleed" was recently discovered in OpenSSL, a popular software library commonly used by many websites on the internet to encrypt communication between a user's computer and a web server. is NOT affected by this vulnerability as it does not use the OpenSSL software library. Please rest assured we are dedicated to protecting your security on this website.