The St. Croix River and its major tributary, the Namekagon, were among the first four designated Wild and Scenic Rivers in 1968. A canoe on the Namekagon and upper St. Croix, passes through northern conifer and hardwood forests, extensive marshes, and wild rice beds. The lower St. Croix is home to unique collections of native mussels.
Paddle down to the resource briefs and reports to see what we're learning about this wild and scenic riverway.
Resources Briefs are condensed versions of our technical reports. They rely on graphics and images more than dense scientific writing, but anyone who is intrigued and wants to know more can always use the resource brief as an entry into the report.
These technical reports are produced by network staff and other scientists working in, on, or along the St. Croix and Namekagon. Lots of information, lots of fascinating discoveries.
Dragonfly Mercury Project
Find out the latest about mercury and dragonfly larvae at your park!
As a foundational part of the aquatic food web, dragonfly larvae we collect each summer are tested for mercury in the environment, which helps us understand mercury contamination at higher levels of the food web.
Visit the website below to find the latest "dragonflier" for the St. Croix and Namekagon Rivers.
The Dragonfly Mercury Project Annual Data Fliers (usgs.gov)
Last updated: October 4, 2023