Station operated in cooperation with Cleveland-Cliffs Inc. and the Michigan Department of Environment, Great Lakes and Energy.
| Min (1974) | 25th percen- tile | Median | Mean | 75th percen- tile | Most Recent Instantaneous Value Jun 10 | Max (1977) |
|---|---|---|---|---|---|---|
| 0.27 | 6 | 11 | 12 | 20 | 21.7 | 26.0 |