Calumet Union Drainage Canal near Markham, IL
Is Calumet Union Drainage Canal near Markham, IL flooding right now?
Calumet Union Drainage Canal near Markham, IL measured 3.59 ft on 2026-09-22 21:15:00 UTC. That observation was 6.4 ft below its 10 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
3.59 ft
Streamflow
51 cfs
Minor flooding here begins at 10 ft, with major flooding at 11.5 ft. The highest crest on record was 12 ft on Mon, Oct 11, 1954.
Streamflow outlook
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 9 ft | 5.4 ft below |
| Minor flood | 10 ft | 6.4 ft below |
| Moderate flood | 10.5 ft | 6.9 ft below |
| Major flood | 11.5 ft | 7.9 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 12 ft | 1954-10-11 |
| 11.5 ft | 1957-07-13 |
| 10 ft | 2008-09-14 |
| 8.64 ft | 2020-05-17 |
| 8.24 ft | 2020-07-19 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Midlothian Creek at Oak Forest, IL | 3.5 mi | Cook County |
| Thorn Creek at Thornton, IL | 3.6 mi | Cook County |
| Little Calumet River at South Holland, IL | 3.6 mi | Cook County |
| Calumet Sag Channel at Blue Island, IL | 3.9 mi | Cook County |
| Natalie Creek at Midlothian, IL | 3.9 mi | Cook County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.