Environmental Services has partnered with the US Fish & Wildlife Service to collect information on fish species community and abundance within Tryon Creek between the Willamette River confluence and the Highway 43 culvert. During a recent survey last September, 45 fish were captured using a seine net at the large pool below the culvert, including cutthroat and steelhead trout, Chinook and coho salmon, sculpin, and whitefish.
The Tryon Creek Confluence Habitat Enhancement Project was completed in 2010 to improve fish and wildlife habitat conditions at the confluence of the Willamette River, and involved partnerships with Metro and the City of Lake Oswego. The work enhanced about 900 feet of Tryon Creek, and builds on prior fish and wildlife habitat restoration work performed by Oregon Department of Transportation (ODOT). In 2008, ODOT completed stream enhancements and modified the Highway 43 culvert to improve fish passage into the 645-acre Tryon Creek State Natural Area, an area well suited for coho salmon and steelhead production.
This intensive fish survey work will be conducted on a monthly basis every other year through 2017, with an annual survey conducted in the in between years. In addition, temporal use surveys of Tryon Creek by juvenile salmon and steelhead will be conducted weekly for three months in the spring/summer during the years when the intensive monitoring efforts are being conducted. The data gathered will help determine the effectiveness of the restoration efforts at the confluence and upstream to the natural area.