Project Description
MCDD’s Pump Station 1 (PS1), built in 1949, is located within the managed floodplain along the Columbia River and Columbia Slough. This pump station plays a critical role as a part of the region’s network of levees, pump stations, and other flood safety infrastructure as it reduces flood risk by removing stormwater from Multnomah County Drainage District’s 8,590 acres, which includes a mix of industrial, commercial, and industrial areas within Portland, Fairview, and...
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Annexing on to the Multnomah County Multi-Jurisdictional Natural Hazard Mitigation Plan
Project Description
PEN 1, PEN 2, MCDD, SDIC, and the UFSWQD are working to annex into the FEMA-approved Multi-Jurisdictional Natural Hazard Mitigation Plan (NHMP) created by Multnomah County, City of Gresham, City of Troutdale, City of Fairview, and City of Wood Village. Originally authorized in 2017, this plan is currently being renewed with the intention of spanning from the fall of 2022 to the fall...
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Project Description
The Peninsula Drainage District #1 (PEN1) manages a network of levees, pump stations, culverts, and drainage ditches that reduce the risk of flooding for the region. PEN1’s mission is to enhance community safety and support the region’s vitality by reducing flood risk, maintaining our levee system, managing drainage, and responding to emergencies.
The PEN 1 Drainage and Water Quality Master Plan (DWQMP), developed in partnership with the City of Portland, Bureau of Environmental Services, evaluated...
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Project Description
The 2021 Report, Working Together for a Resilient Columbia Slough: Identifying Shared Environmental Goals and Opportunities for Joint Action, was created for non-profits, community groups, and government agencies to identify shared priorities for the natural environment in the Columbia Slough watershed. Read the full report, or the two-page summary.
The report proposes a set of goals and opportunities for collaborative environmental improvement, developed through interviews with 22 organization representing stakeholders, community members, and...
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Project Description
A pipe connecting a ditch located to the north of NE South Shore Road has been clogged for many years. This pipe drains to the NE 13th Avenue drainage system, which consists of roadway ditches and driveway culverts. The clogged pipe has resulted in flooding of private properties in the vicinity of the pipe. The Peninsula Drainage District #2 (PEN2) Board of Supervisors instructed MCDD staff to conduct temporary pumping into the drainage system between NE South Shore and Faloma roads beginning in the winter of 2015...
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Project Description
There are two discharge lines (a section of piping systems) from the 13th Avenue Pump Station that feed into the Columbia Slough. The goal of this project is to extend the useful life and reliability of the discharge lines for approximately 10 more years.
The discharge lines have visual inflections (bends or structural flaws) and the slope supporting the pipes has eroded into the lower Columbia Slough which requires stabilization and reconstruction to support...
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Project Description
Trash rakes are key infrastructure that help to reduce flooding behind the levee system by removing debris and waste from the Columbia Slough before it enters our pump stations.
The existing trash rake system at the MCDD campus was installed outside of Pump Station #1 (PS1) in 1998 and has reached the end of its service life. Frequent equipment failures cause these raking systems to shut down during heavy rainstorms, which often causes our...
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Project Description
In partnership with the City of Troutdale, the Sandy Drainage Improvement Company (SDIC) developed a Drainage Master Plan to guide future capital projects and drainage priorities over the next 15-20 years. The plan evaluated the condition of pipes, drainage ditches, and pump stations that collect and direct rain water in order to identify areas that need improvement and prioritize future investments to better prevent and manage flooding for communities in this area. Management...
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FLOOD MITIGATION AND THE COLUMBIA RIVER TREATY
The Columbia River Treaty (CRT) is an international agreement for water cooperation, governing the upper Columbia River Basin flows for both flood control and power generation. Largely created in response to devastating floods, the 1964 Treaty urged for future flood mitigation strategies that protect property and the well-being of communities along the river. This led to the construction of three large storage reservoirs in British Columbia and one in...
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