RIVER GAUGE · SANGAMON RIVER
Sangamon River at Petersburg
Menard County, Illinois
Water level4.69 ft
Flow250 cfs
Last readingSep 16, 2026, 5:15 PM UTC (last recorded)
Action18 ft
Minor flood23 ft
Moderate flood24 ft
Major flood33 ft
The past week
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What floods at each level
- 29 ft
Route 123 is closed. Water overtops Illinois Midland railroad tracks at 4th Street.
- 25 ft
Some residences on the east side of Petersburg flood.
- 23 ft
Extensive agricultural and lowland flooding occurs.
- 22 ft
Altig Bridge Ave. closed due to water over the west approach roadway.
- 21 ft
Park and recreational land near the river in Petersburg is flooded.
- 15 ft
Water begins to flood agricultural areas and local parks near the river.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| May 19, 1943 | 33.9 ft | — |
| May 13, 2002 | 30.75 ft | — |
| Dec 31, 2015 | 30.55 ft | 44,800 cfs |
More on Sangamon River
UpstreamSangamon River at Riverton
DownstreamSangamon River near Oakford
Get an alert when Sangamon River rises
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