Willamette River at French Prairie State Park. RIVERS: Willamette R.-Columbia R., Willamette Valley. Willamette River on S. side at RM 40.9, near fishing access at French Prairie State Park, off Wilsonville-Butteville Road, Clackamas County, Oregon, United States
Collection Date:
8 Oct 1992
Notes:
Large river; sand-fine gravel (some local mud) substrate; scattered macrophytes (Potamogeton crispus); substrate mostly bare; rippled sand–mud with clay clasts; some sunken wood. Slow current; slight turbidity; cold. Common tall flat-sided Fluminicola; uncommon Juga plicifera. Dip net and hand collections.