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Environmental Services will soon begin construction of a stormwater management project in a portion of the Parkrose neighborhood. This project is part of a larger effort to improve water quality in the Columbia Slough. Currently, when it rains, stormwater flows over streets, picking up pollutants along the way. Then, the water flows into the City’s stormwater pipes which carry the polluted stormwater directly in to the Slough.
To clean and filter stormwater in the area before it flows into the Slough, this project will construct 10 underground injection control structures, 12 manholes with manufactured stormwater treatment systems, 22 sedimentation manholes, and two green streets. These new structures will improve water quality, help control stormwater runoff during heavy rain events, and protect the Columbia Slough.
The construction boundary is NE Marx Street to NE Shaver Street between NE 116th Avenue and NE 122nd Avenue.
Our contractor, Landis & Landis Construction, is scheduled to begin construction the first week of March. The stormwater management improvements will have several phases, including phases of inactivity, and should be completed by spring 2021.
General construction hours will be from 7 a.m. to 6 p.m., Monday through Friday, with some Saturday construction as needed. To minimize traffic impacts, Environmental Services received a Noise Variance Permit to do night work that will be conducted along NE 122nd Avenue between NE Shaver Street and NE Marx Street. Night work will be from May 1 to September 30, 6 p.m. to 7 a.m., Monday through Friday.
Prior to construction, you may see crews surveying, trimming trees to protect them from large equipment, inspecting pipe and manholes to verify their conditions, marking and relocating utilities, or other preconstruction activities. For more information, go to www.portlandoregon.gov/bes/precon.
You can expect the following activities and impacts during sewer construction:
What is a Green Street?
Green streets are rain gardens that collect stormwater runoff from streets and allow water to soak into the ground as soil and vegetation filter pollutants.
What will they do?
Currently when it rains, water flows from streets and sidewalks into the storm system that carries it directly to the Columbia Slough. The new green streets will collect and filter this polluted runoff before it enters the pipes or soaks into the ground to protect water quality in the Columbia Slough.
Who maintains these new rain gardens?
The city maintains green streets to ensure that they effectively manage stormwater. Portland has more than a thousand green streets across the city.
Where will the green streets be located?
Environmental Services locates green street planters where they will be most effective in collecting stormwater. The planters in this project will be curb extensions, extending into the on-street parking zone next to the curb.
Will there be a green street outside of your house?
Environmental Services will communicate with all adjacent property owners where proposed green streets will remove on-street parking spaces.
Environmental Services has resources to help fund your ideas for planting trees and native plants in the households, businesses, non-profits, local schools and local places of worship that you are involved with.
Project ideas include, but are not limited to:
To learn more about how we can fund your project, email Michelle Moulton at Michelle.Moulton@PortlandOregon.gov or call at 503-823-8193.
Learn more about Underground Stormwater Management Structures