RIVER GAUGE · CHICAGO SANITARY AND SHIP CANAL
Chicago Sanitary and Ship Canal at Lockport Lock (tailwater)
Will County, Illinois
Water level539.01 ft
Flow—
Last readingSep 16, 2026, 4:00 PM UTC (last recorded)
Action540.5 ft
Minor flood541 ft
The past week
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What floods at each level
- 10000 ft
High streamflows begin to cause closures of portions of the Chicago Sanitary and Ship Canal.
- 7000 ft
High streamflows begin to impact shipping interests along the river.
- 567 ft
High water levels cause Lockport Lock to shut down.
- 546.6 ft
High water levels begin to impact shipping interests along the river.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Dec 3, 1982 | 546.59 ft | — |
| May 17, 2020 | 544.4 ft | — |
| Sep 13, 2008 | 543.74 ft | — |
When the water runs low
- 536.5
Low water levels begin to impact shipping interests along the river.
More on Chicago Sanitary and Ship Canal
DownstreamDes Plaines River at Joliet
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