Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Mokelumne River at Benson's Ferry

Highest listed crest 20.56 ftFlood stage 17.0 ft13 crests since 2016

The Mokelumne River at Benson's Ferry crested at major flood stage 2 times among the 13 crests the National Weather Service lists from 2016 to 2026. The highest, 20.56 ft on February 11, 2017, was major flooding, 3.56 feet above flood stage.

The gauge

Highest listed crest
20.56 ft
February 11, 2017
Flood stage
17.0 ft
Major flooding from 20.0 ft
Crests at major
2
24th of 106 gauges in California
Most recent flood crest
January 1, 2023
20.23 ft, major flooding
Location
San Joaquin County
Near Galt (7.7 mi), Elk Grove (11.4 mi), Lodi (12.3 mi)
Identifiers
NWS THTC1
No USGS station

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Mokelumne River at Benson's Ferry
Action stage12.06Jan 6, 2026The level at which the NWS or its partners begin to take action
Flood stage (minor)17.00—Minimal or no property damage, but possibly some public threat
Moderate flood stage19.01Jan 12, 2017Some inundation of structures and roads near the stream
Major flood stage20.02Jan 1, 2023Extensive inundation of structures and roads

Every listed crest

13 crests from 2016 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Mokelumne River at Benson's Ferry, 2016 to 2026 510152025ft Flood stage 17.0 ftMajor 20.0 ft Mar 15, 2016: 12.45 ft, action stageJan 12, 2017: 19.89 ft, moderate floodingFeb 11, 2017: 20.56 ft, major floodingMar 24, 2018: 13.08 ft, action stageFeb 16, 2019: 13.65 ft, action stageApr 8, 2020: 8.25 ft, below flood stageJan 29, 2021: 6.71 ft, below flood stageDec 29, 2021: 10.71 ft, below flood stageJan 1, 2023: 20.23 ft, major floodingMar 16, 2023: 13.99 ft, action stageMar 4, 2024: 10.87 ft, below flood stageFeb 15, 2025: 12.07 ft, action stageJan 6, 2026: 12.30 ft, action stage Highest, 20.56 ft, Feb 11, 2017 20202025

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Mokelumne River at Benson's Ferry 2010s: 2 2 2020s: 1 2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.
  3. 33 crests measured on an earlier gauge datum are left out: 8.10 ft on Jan 19, 1959; 8.70 ft on Feb 10, 1960; 10.37 ft on Feb 16, 1962; 8.84 ft on Jan 23, 1964; 15.60 ft on Dec 24, 1964; 6.08 ft on Feb 7, 1966; and more.

Highest crests

Highest listed crests, Mokelumne River at Benson's Ferry
1Feb 11, 201720.56+3.56Major—
2Jan 1, 202320.23+3.23Major—
3Jan 12, 201719.89+2.89Moderate—
4Mar 16, 202313.99−3.01Action—
5Feb 16, 201913.65−3.35Action—
6Mar 24, 201813.08−3.92Action—
7Mar 15, 201612.45−4.55Action—
8Jan 6, 202612.30−4.70Action—
9Feb 15, 202512.07−4.93Action—
10Mar 4, 202410.87−6.13Below flood stage—
11Dec 29, 202110.71−6.29Below flood stage—
12Apr 8, 20208.25−8.75Below flood stage—
13Jan 29, 20216.71−10.29Below flood stage—

Other gauges in San Joaquin County

Flood gauges in San Joaquin County
Vernalis29.034.88 ft, Jan 5, 19970

San Joaquin County: every hazard · River floods across the country · California

NOAA National Water Prediction Service, gauge THTC1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.