Clackamas Water Environment Services is beginning a project to improve the environmental functions of 3-Creeks Natural Area.
Three creeks — Mt. Scott, Phillips and Dean Creeks — converge on the site to form Mt. Scott Creek, making it an important location for surface and stormwater management and natural habitat. Mt. Scott Creek flows into Kellogg Creek and then to the Willamette River.
Urbanization is taking a toll on the site, with streams eroding, habitat changing and flooding of developed properties becoming more common. This project will enhance the floodplain, improve water quality, improve fish and wildlife habitat and provide opportunities for pedestrian access and environmental education on the site, where feasible.
3-Creeks Natural Area benefits our entire region.
3-Creeks Natural Area Floodplain Enhancement
Project Presentation - Dec. 2, 2021
What we’ve completed so far
- On site surveys, site assessment
- Alternatives development and analysis including Hydraulic & Hydrologic modeling
- Developed 30% plans and cost estimate
- Public outreach, stakeholder meetings, and input
- Meetings with permit agencies, seeking guidance before submitting permit applications. Attempted to schedule meetings with Oregon Dept. of State Lands (DSL), US Army Corps of Engineers (USACE), National Marine Fisheries Service and Oregon Dept. of Fish & Wildlife-Fish (ODFW) Passage Coordinator. We were only able to get meetings with DSL and ODFW, but communicated via email with USACE.
- Applied for grants: we applied to FEMA, NOAA Fisheries, National Fish & Wildlife Foundation, and Metro. We were selected for a Metro Nature in Neighborhoods Capital Grant and have a grant agreement in place as of December 2023.
- Developed 60% plans and cost estimate
- Prepared the Joint Permit Application for Oregon Dept. of State Lands and U.S. Army Corps of Engineers removal-fill permits
- Completed a Preliminary Cultural Resources Assessment and shovel probe survey, and historic evaluation of the existing bridge. The shovel probe surveys turned up 16 pieces of lithic debris, considered pre-contact fragments leftover from tool-making. The bridge was determined not eligible for listing in the National Register.
- Installed a geotechnical boring to provide information needed in bridge design.
- Began working on an agreement with the North Clackamas Watersheds Council (NCWC) to provide outreach, as part of our Metro Nature in Neighborhoods grant. NCWC will team with Unite Oregon to include outreach to underserved communities.
- The Wetlands Conservancy has conducted the first of two volunteer amphibian egg mass surveys. The survey found over 200 Pacific chorus frog egg masses, 24 long-toed salamander egg masses, and one red legged frog egg mass. This is a sign of very good habitat quality in the existing wetlands!
What’s next?
- Since cultural resources were discovered in the area planned for new floodplain excavation, evaluative test excavations will be done to determine whether Clackamas Water Environment Services may proceed with floodplain enhancement in that area.
- Gate adjustment upgrades are planned for fall or winter 2024
- Instream work is planned for summer 2025
News about the 3-Creeks Natural Area Floodplain Enhancement Project
SOLVE, Clackamas Water Environment Services, & Bob's Red Mill partnered to celebrate the kick-off of the SOLVE Summer Waterway Cleanup Series to remove harmful litter from the 3-Creeks Natural Area, helping to keep our streams, rivers, and communities clean and healthy!