St Joe River at St Maries
Idaho — Water Level & Flood Stage
Located in Benewah County, Idaho on the St Joe River. Live water level data from USGS gauge 12415070, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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Flood Stages
Major Flood
38 ft
Moderate Flood
36 ft
Minor Flood
32.5 ft
Action Stage
31 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
36.5 ft
Extensive lowland flooding will occur along the St Joe and St Maries River valleys. Water will be several feet deep around the homes on Highway 3 between Delphi Lane and Goosehaven Dr. The southwest corner of the IGA parking lot will be flooded and approaching Zip's drivethrough. The corner of 1st and Riverside will be flooded, water will be around the building east of 1st street, and Riverside will Ave be flooded at the Highway 3 undercrossing. Parking lots at Highway 3 and Milwaukee Rd will be flooded.
36 ft
Extensive lowland flooding is likely. Some sections of the St Joe River Road may be inundated. Water will approach the flood gates in the levee at the Aqua Park.
35 ft
Water will be up to Aqua Avenue in St Maries near Leeve hill and walking trail.
33 ft
Water may be over St Joe City Road, east of St. Maries to Calder.
32.5 ft
Minor flooding will occur throughout the low lying areas of the St Joe Valley. Water will be observed behind levees due to seepage. Minor flooding of the Aqua Park's boat launch and swim beach along the river's edge. Outbuildings along the river that are not behind levees may be flooded.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Dec 22, 1933 | 42.2 ft | — |
| Dec 22, 1933 | 42.2 ft | — |
| Feb 9, 1996 | 42 ft | — |
| Feb 9, 1996 | 42 ft | — |
| Jan 15, 1974 | 41.4 ft | — |
About This Gauge
Get Flood Alerts for St Joe River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of St Joe River at St Maries?
The St Joe River at St Maries gauge is maintained by USGS (site 12415070) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for St Joe River at St Maries?
The NWS-defined flood stage for St Joe River at St Maries is 32.5 feet. Action stage begins at 31 feet. Moderate flooding starts at 36 feet, and major flooding at 38 feet.
How do I get alerts when St Joe River rises?
Download StormCast free on Google Play, go to River Gauges, and add St Joe River at St Maries to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the St Joe River at St Maries gauge located?
The gauge is located in Benewah County, Idaho at coordinates 47.3169°N, 116.5547°W. USGS site number: 12415070. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on St Joe River
On This River
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice during winter months.
- Gauge readings can be affected by backwater from downstream lake.