CNRFC - Hydrology - River Guidance - Graphical RVF

End of River Group

Location:

MOKELUMNE RIVER - BENSON'S FERRY (THTC1)

Latitude: 38.26º N	Longitude: 121.44º W	Elevation: 16 Feet
Location: Sacramento County in California		Bulletin Group: San Joaquin		River Group: North San Joaquin

Issuance Time:

Jan 01 2026 at 8:47 AM PST

Next Issuance:

Jan 01 2026 at 3:00 PM PST

Action/Monitor: 12.0 Feet

Minor Flood: 17.0 Feet

Moderate Flood: 19.0 Feet

Major Flood: 20.0 Feet

Please Note:

On August 14, 2025, the moderate flood stage for this location changed to 19.0 ft, and the major flood stage changed to 20.0 ft. More information can be found here.

Plot Type:

Please Note:
1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.

Observed Data Credit
	Raw streamflow data is provided by the California Department of Water Resources. View California Department of Water Resources Data for this station location.

Historical Stage/Flow Data
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025	--	11.84	Feb 16, 2025
2024	--	10.87	Mar 4, 2024
2023	--	20.23	Jan 1, 2023
2022	--	10.71	Dec 29, 2021
2021	--	6.71	Jan 29, 2021
Historical High Stage/Flow Events (Period of Record - Jan 1959 to Present) - Ranked by Stage
1997	--	21.69	Jan 02, 1997
2017	--	20.57	Feb 11, 2017
2023	--	20.23	Jan 1, 2023
2006	--	18.54	Apr 06, 2006
1986	--	18.32	Feb 18, 1986
1995	--	17.51	Mar 12, 1995
* Datum changed from NGVD29 to NAVD88 on 10/01/2006. The difference is -0.75 ft and must be applied to all data before date to convert to NAVD88

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
29.6 Feet	Top of Levee Left Bank
17.25 Feet	Some local farm roads are closed. Low lying areas along the river are flooded.

Official 7 Day National Weather Service Forecast (CAZ017)

Today: Patchy fog early in the morning. Rain. Highs 53 to 59. East winds up to 10 mph shifting to the south in the afternoon. Gusts up to 25 mph.

Tonight: Mostly cloudy. Rain likely in the evening, then a chance of rain after midnight. Lows around 49. Southeast winds 10 to 15 mph.

Friday: Mostly cloudy with a slight chance of rain. Highs 53 to 59. Southeast winds 10 to 15 mph. Gusts up to 25 mph in the afternoon.

Friday Night: A chance of rain in the evening, then rain after midnight. Breezy. Lows around 53. Southeast winds 10 to 15 mph increasing to 10 to 25 mph after midnight.

Saturday: Rain in the morning, then rain showers and a slight chance of thunderstorms in the afternoon. Highs 53 to 59. South winds 15 to 20 mph with gusts to around 30 mph.

Saturday Night: Rain showers and a slight chance of thunderstorms. Lows around 52.

Sunday: Rain showers and a slight chance of thunderstorms. Highs around 53.

Sunday Night: Rain showers and a slight chance of thunderstorms. Lows around 49.

Monday and Monday Night: Rain. Highs 49 to 54. Lows around 47.

Tuesday: Mostly cloudy with a chance of rain. Highs around 51.

Tuesday Night and Wednesday: Mostly cloudy with a slight chance of rain. Lows around 40. Highs around 50.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Sacramento Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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