Siuslaw River near Mapleton
Oregon — Water Level & Flood Stage
Located in Lane County, Oregon on the Siuslaw River. Live water level data from USGS gauge 14307620, 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
28 ft
48,000 cfs
Moderate Flood
22 ft
31,500 cfs
Minor Flood
18 ft
22,200 cfs
Action Stage
15 ft
16,000 cfs
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
32.5 ft
the flow at this level is about 62,000 cfs and has a 1 percent chance of happening in a given year (aka 100-year flood).
30.6 ft
the flow at this level is about 56,000 cfs and has a 2 percent chance of happening in a given year (aka 50-year flood).
28 ft
expect major flooding along Riverview Avenue area and numerous homes and businesses in Mapleton. Flooding of roads adjacent to the Siuslaw River in the vicinity of Mapleton is likely. Flooding of Highways 126 and 36 will be significant.
26 ft
the flow at this level is 42,000 cfs and has a 10 percent chance of happening in a given year (aka 10-year flood).
25 ft
expect widespread flooding, including several homes and structures in low areas of Mapleton. Many sections of Highway 126 from Tiernan to Mapleton, along with Hwy 36 north of Mapleton begin to flood. Flooding may be exacerbated during high tide.
23.2 ft
the flow at this level is about 35,000 cfs and has a 20 percent chance of happening in a given year (aka 5-year flood).
22 ft
expect widespread flooding of low-lying land. Several homes and structures in low areas of Mapleton start to flood. Numerous rural roads along and near the Siuslaw River will likely be flooded, and water begins to cover the lower sections of Hwy 126 at this stage. Flooding may be exacerbated during high tide.
20 ft
expect water over East Mapleton Road. Flooding of some low-lying homes and structures begins. Flooding may be exacerbated by high tide.
19.1 ft
The flow at this level is about 24,600 cfs and has an annual chance of 50 percent (aka 2-year flood).
18 ft
expect minor flooding of low lying dairy land along with some structures right along the banks of the Siuslaw River in and near Mapleton.
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 |
|---|---|---|
| Feb 6, 1996 | 30.21 ft | 54,800 cfs |
| Feb 6, 1996 | 30.21 ft | 54,800 cfs |
| Jan 20, 1972 | 28.45 ft | 49,400 cfs |
| Jan 20, 1972 | 28.45 ft | 49,400 cfs |
| Jan 15, 1974 | 28.28 ft | 48,900 cfs |
About This Gauge
Get Flood Alerts for Siuslaw 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 Siuslaw River near Mapleton?
The Siuslaw River near Mapleton gauge is maintained by USGS (site 14307620) 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 Siuslaw River near Mapleton?
The NWS-defined flood stage for Siuslaw River near Mapleton is 18 feet. Action stage begins at 15 feet. Moderate flooding starts at 22 feet, and major flooding at 28 feet.
How do I get alerts when Siuslaw River rises?
Download StormCast free on Google Play, go to River Gauges, and add Siuslaw River near Mapleton 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 Siuslaw River near Mapleton gauge located?
The gauge is located in Lane County, Oregon at coordinates 44.0633°N, 123.8828°W. USGS site number: 14307620. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey