Tulloch Reservoir near Knights Ferry water level

Name: Tulloch Reservoir near Knights Ferry water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Reservoir, Tulloch Reservoir, California, United States

Directions

Latest reading

Surface elevation

503.79ft Up 0.25 ft over the last 24 hours

Measured Oct 20, 2026, 09:15 PM PDT (44 min ago)

Water stored: 55,030 acre‑ft

History

7 days

Surface elevation

What this means

The U.S. Geological Survey reports Tulloch Reservoir near Knights Ferry at 503.79 ft. The agency publishes no normal range or warning level for this reservoir yet, so there is nothing to judge the number against.

It is on the way up, by 0.25 ft over the past 24 hours. The 30-day range is 501.90 ft – 503.79 ft.

Over the past seven days the change adds up to +1.32 ft.

The agency publishes no normal range for this gauge yet, so we show the trend only. How to read levels

Boating and fishing at Tulloch Reservoir near Knights Ferry

Use the recent trend to judge conditions. A fast rise or fall shows up at docks and beaches within days.

Conditions at the shore change with the level, so check with the agency that runs the lake before a trip.

Weather at the gauge

No rain in the last 3 days.

20 Tue 73° 50° – Wind 8 mph

21 Wed 74° 58° 0.20 in, 42% Wind 14 mph

22 Thu 64° 55° 0.75 in, 76% Wind 12 mph

23 Fri 72° 55° – Wind 10 mph

24 Sat 75° 52° – Wind 5 mph

25 Sun 79° 56° – Wind 6 mph

26 Mon 81° 57° – Wind 5 mph

Forecast: Open-Meteo

Sunrise 07:17 AM Sunset 06:18 PM Daylight 11 hr, 1 min Waxing gibbous 74%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
New Melones LakeLake	1,003.98 ft	Normal		7 mi
Modesto Canal near La GrangeRiver gauge, Modesto Canal	299 cfs	Normal	−8.0 cfs	16 mi
Tuolumne River below Lagrange Dam near LagrangeRiver gauge, Tuolumne River	214 cfs	Low	−296.0 cfs	17 mi
Turlock Canal near La GrangeRiver gauge, Turlock Canal	986 cfs	High	+116 cfs	17 mi
Big Creek above Whites Gulch near GrovelandRiver gauge, Big Creek	0.0 cfs	Normal	±0	23 mi
Tuolumne R A ModestoRiver gauge	38.38 ft	Below flood stage	−1.49 ft	27 mi
Stanislaus R A RiponRiver gauge	39.74 ft	Below flood stage	−0.94 ft	29 mi
Tuolumne River below Early Intake near MatherRiver gauge, Tuolumne River	48.5 cfs	Normal	−2.0 cfs	35 mi

Questions and answers

Is Tulloch Reservoir near Knights Ferry really 503.79 ft deep?

No. 503.79 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Tulloch Reservoir near Knights Ferry today?

On Oct 20, 2026, 09:15 PM PDT, the surface elevation was 503.79 ft. Up 0.25 ft over the last 24 hours.

Is Tulloch Reservoir near Knights Ferry rising or falling?

Up 0.25 ft over the last 24 hours. Up 1.32 ft over the last 7 days.

Is the level of Tulloch Reservoir near Knights Ferry normal?

The agency publishes no normal range for this gauge yet, so we show the trend only.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:11299995 (Agency page)
Coordinates: 37.87604, -120.60437 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Surface elevation	503.79 ft	2026-10-21 04:15	Provisional
Water stored	55,030 acre‑ft	2026-10-21 04:15	Provisional

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How to cite

U.S. Geological Survey: Tulloch Reservoir near Knights Ferry (usgs:11299995). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/tulloch-reservoir-near-knights-ferry

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer