This project will strengthen the structural supports (known as trestles) that hold a water pipe near Kelly Creek and Beaver Creek in Gresham.
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Not if, but when... You’ve heard about our region’s earthquake risks. The Water Bureau has worked for the past several decades to increase the number of water supply facilities that can withstand earthquakes. The Gresham trestle replacement project is part of our commitment to preparedness and our mission of serving excellent water every minute of every day.
This project will strengthen the structural supports (known as trestles) that hold the water pipe that runs along Kelly Creek in Gresham. Both the pipe and trestles were installed here in 1911. The pipe is in good condition, but the trestles might not endure a large earthquake or heavy flooding. The work we're doing will make Portland’s and Gresham’s water supply more resistant to earthquakes and floods.
As part of the project, we will remove trees and other vegetation to allow equipment to access the trestle. We will then follow an extensive restoration plan developed with the City of Gresham. After construction, crews will landscape the entire lot with native trees and plants that will improve the health of the creek.
We have completed the bidding process and hired Oxbow Construction to perform the work.
Preparing the work zone
Crews will be on site in the coming months to look at survey markers and set up erosion control and tree protections. They will then remove trees and vegetation from the work site. After that, they will move equipment to the site to drill holes for the new concrete pipe supports.
Protecting the creek
We know you care about Kelly Creek—we do, too! We worked closely with the City of Gresham to develop a site-specific erosion control and restoration plan. Our crews are required to mark and put protective fencing around specific trees, install erosion control along the stream, and plant native grasses to help stabilize the hillside. We will also remove invasive plants by hand and by spot application of herbicide. When the project is done, we will plant the entire lot (not just the work site) with native trees, shrubs, and grasses.
What to expect
Work hours: Monday to Friday, 7:00 a.m. to 4:30 p.m.
Parking: Some on-street parking spaces will be used by employees. Most equipment and supplies will be stored on the construction site, but some may be stored in the street to limit our impact on the creek.
Site access: Crews will access the site from SE La Mesa Court and NE El Camino Drive. Equipment will be brought on site via SE La Mesa Court.
Noise: You will hear noise from chainsaws as trees and vegetation are removed. You will hear machinery when we move excavators on site.
Mail, garbage and delivery services will have access.
This work will not disrupt your water service.
Work may be delayed if staffing availability or construction resources change due to current events. Employees and contractors will continue to follow all safe work zone and social distancing measures.
Construction and revegetation schedule
Construction is expected to begin in fall 2020. Please note that the dates listed below may change based on crew availability and weather.
- Site survey
- Project out to bid
- Erosion controls and tree protection put in place
- Invasive vegetation removal
- Tree removal
- Native grass seeding
- Equipment moved on site, construction begins
- Construction wraps up
- Shrub and tree planting
- Monitoring plantings to ensure healthy growth
- Removal of all erosion controls
- Ongoing monitoring and maintenance
- More planting if needed