Station operated in cooperation with Cleveland-Cliffs Inc. and the Michigan Department of Environment, Great Lakes and Energy.
| Min (1978) | 25th percen- tile | Median | Mean | Most Recent Instantaneous Value Nov 15 | 75th percen- tile | Max (1981) |
|---|---|---|---|---|---|---|
| 0.02 | 7.8 | 12 | 13 | 13.8 | 18 | 27.0 |