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Iron (Big Iron) River, Ontonagon County, Michigan, USA
at the bridge of Michigan Highway 28, west, southwest of Bergland.
latitude: 46.6782
longitude: -89.6511
Precision of location: Gauged from chart or map
Site Named Here: By name of island, bay, strait, lake, river, or stream, etc., named in source publication
| Curtisia foremani | Aug 19, 1940 | several specimens (mature and immature) and cocoons under stones. Water temperature 17.5 degrees C. Water clear, highly colored, moderate current, local rapids; bottom, mud and stones, much algal vegetation.. |