Transportation Engineering

Increasing stormwater capacity to reduce flooding and improve maintenance access

Flooding on El Camino Way, El Centro Way, El Centro Ct and La Mesa Way roads in the Oak Grove area occurs periodically. To reduce the frequency of flooding and to provide stormwater infrastructure with capacity for a 10-year storm event, we will replace the existing stormwater pipes. Currently, most of the stormwater pipes exist on private property and most of the pipes will be moved to existing roads within the public right of way. Constructing the storm pipes within the right of way will be easier to maintain.

Why

To decrease the frequency of flooding, improve maintenance access, and to comply with Oak Lodge Water District and Clackamas County standards requiring stormwater collection systems to provide for a 10-year storm event for this size of drainage basin.

Schedule

• Design: Feb. 2023 to April 2024
• Right of way: Dec. 2023 to April 2024
• Construction: Spring 2025 to Fall 2025

Traffic impact

• Expect shoulder and lane closures and detours with delays up to 20 minutes during construction.

Current activities

• Project planning and solicitation of design services.

Funding

• Project estimate $1.4 million 
• Funding is provided from American Rescue Plan Act (ARPA) funds.

Increasing stormwater capacity to reduce flooding and improve fish habitat and waterway access

Kellogg Creek flows through an undersized culvert causing the creek to back up at SE Thiessen Road and flood the road and properties upstream. We will replace the culvert with a larger culvert to allow water to move naturally for lower stream flows in the summer and higher stream flows from large storm events in the winter. Vegetation will be planted at both ends of the culvert to restore stream habitat.

Why

To decrease the frequency of flooding on the roadway and water backed up on adjacent properties upstream, and improve the habitat and ability for fish to pass through the culvert carrying Kellogg Creek.

Schedule

• Design: April 2023 to Dec. 2024
• Right of way: April 2024 to Winter 2024/2025
• Construction: Spring 2025 to Winter 2025/2026

Traffic impact

• Expect shoulder and lane closures and detours with delays up to 20 minutes during construction.

Current activities

• Project planning and solicitation of design services.

Funding

• Project estimate $1.5 million paid for with American Rescue Plan Act (ARPA) funds.

Increasing stormwater capacity to reduce flooding and improve fish habitat and waterway access.

Badger Creek flows under Rugg Road through two undersized culverts, which contributes to flooding near Rugg Road. The Johnson Creek Watershed Action Plan has identified this project as a high priority for replacement. We will replace these culverts with a single, larger culvert to allow unrestricted movement of aquatic life and to allow Badger Creek to flow naturally. We will also install large wood pieces and plant vegetation at both ends of the culvert to restore stream habitat. 

Why

To decrease the frequency of flooding in the vicinity of the Rugg Road crossing, to improve habitat quality and to improve the ability of fish to migrate.

Schedule

• Design: April 2019 to Dec. 2023
• Right of way: Dec. 2022 to Spring 2024
• Construction: Summer 2025 to Winter 2025

Traffic impacts

A road closure is needed for the majority of construction. When the road closure is not necessary for construction, expect shoulder and lane closures and detours with delays up to 20 minutes.

Current activities

Project planning, project design and coordinating permit applications. 

Funding

• Project estimate $500,000.
• Funding is provided in part from county road funds. The county is assisting the Johnson Creek Watershed Council in applying for an Oregon Watershed Enhancement Board (OWEB) grant.