Sawmill Creek (IL) near Lemont, IL
River level and flood forecast · Du Page County
Normal8.4 ftas of Mon 3 PM
The river is 5.6 ft below flood stage (14 ft).
Flow: 3 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 20 ft |
| Moderate flood stage | 16 ft |
| Flood stage | 14 ft |
| Action stage | 12.5 ft |
| Record crest (July 18, 1996) | 17.53 ft |
What floods at each level
From the National Weather Service, highest first.
- 22 ftIndustrial structures are threatened at Argonne National Laboratory.
- 20 ftNorthgate Road is threatened at South Cass Avenue south of Darien.
- 18 ftNumerous minor roadways are threatened at Argonne National Laboratory.
- 17.5 ftBluff Road west of the creek is threatened at Argonne National Laboratory. Trails are threatened near the creek mouth in Waterfall Glen.
- 16.5 ftSouth Cass Avenue is threatened at the creek south of Darien.
- 15.5 ftWater treatment plan property is threatened at Argonne National Laboratory.
- 15 ftPicnic areas are inundated near the main waterfall in Waterfall Glen.
- 13 ftLow-lying trails are threatened near the main waterfall in Waterfall Glen.
- 12 ftWater overflows low-lying banks at Argonne National Laboratory.
Highest crests on record
- 17.53 ft — July 18, 1996
- 15.24 ft — April 18, 2013
- 14.64 ft — February 21, 1997
- 14.46 ft — May 17, 2020
- 13.97 ft — July 29, 2016
Recent crests: 13.5 ft (June 26, 2021) · 14.46 ft (May 17, 2020) · 13.13 ft (May 27, 2019) · 13.79 ft (October 15, 2017) · 12.98 ft (April 29, 2017)
Up and down the river, and nearby
- DownstreamDes Plaines River near Lemont, IL
- Chicago Sanitary and Ship Canal at Lemont, IL
- Flag Creek near Willow Springs, IL
- Long Run near Lemont, IL
- East Branch Du Page River at Bolingbrook, IL
- Chicago Sanitary and Ship Canal at Romeoville, IL
- Stony Creek at Worth, IL
- East Branch Du Page River at Lisle, IL
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (LMTI2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.