Tongue River at Tongue R Dam near Decker MT water level

Name: Tongue River at Tongue R Dam near Decker MT water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Tongue River, Montana, United States

Directions

Low for late October

Water level

10.41ft Steady over the last 24 hours

Measured Oct 21, 2026, 12:30 AM MDT (33 min ago)

Flow: 98.3 cfs
Water temperature: 53 °F

History

7 days

Water level

What this means

The Tongue River at Tongue R Dam near Decker MT is running below normal at 10.41 ft.

The level has held steady over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. In the last month it has stayed between 10.40 ft and 10.41 ft.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that. The sensor also reports a water temperature of 53 °F.

Compared with 5 years of daily readings for this time of year. How to read levels

Key numbers

Highest on record: 18.69 ftMay 30, 2019

Floating and fishing near Tongue River at Tongue R Dam near Decker MT

Low water exposes gravel bars that make good wading access, but some boat ramps may be left high and dry.

Highest crests on record

Rank	Level	Date
1	18.69 ft	May 30, 2019
2	17.02 ft	May 30, 2018
3	16.63 ft	June 8, 2007
4	16.49 ft	June 11, 2011
5	16.30 ft	May 31, 2014
6	16.00 ft	June 5, 2015
7	15.93 ft	June 12, 2023
8	15.88 ft	June 10, 1999
9	15.70 ft	June 17, 1997
10	15.42 ft	June 21, 1995

Weather at the gauge

No rain in the last 3 days.

21 Wed 76° 40° – Wind 10 mph

22 Thu 78° 50° – Wind 8 mph

23 Fri 81° 48° – Wind 25 mph

24 Sat 54° 39° – Wind 19 mph

25 Sun 47° 36° – Wind 17 mph

26 Mon 53° 37° – Wind 15 mph

27 Tue 51° 34° 0.01 in Wind 17 mph

Forecast: Open-Meteo

Sunrise 07:31 AM Sunset 06:13 PM Daylight 10 hr, 42 min Waxing gibbous 75%

Map

Other gauges on the Tongue River

Gauge	Level	Compared with normal	24 hours	Distance
Tongue River at State Line near Decker MTRiver gauge, Tongue River	115 cfs	Very low	−3.0 cfs	10 mi
Tongue River at AshlandRiver gauge, Tongue River	99.1 cfs	Very low	+1.3 cfs	40 mi
Tongue River at Miles CityRiver gauge, Tongue River	1.69 ft	Below flood stage	+0.01 ft	97 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Rosebud C at Reservation Bndry near Kirby MTRiver gauge, Rosebud C	3.8 cfs	Normal	−0.6 cfs	19 mi
Tongue R at Birney Day School Br near Birney MTRiver gauge, Tongue R	0.94 ft	Below flood stage	+0.06 ft	24 mi
Rosebud C Bel Lame Deer C near Lame Deer MTRiver gauge, Rosebud C Bel Lame Deer C	15.5 cfs	Normal	+0.2 cfs	37 mi
Little Bighorn River at State Line near Wyola MTRiver gauge, Little Bighorn River	71.2 cfs	Low	±0	42 mi
Little Bighorn River near Crow Agency MTRiver gauge, Little Bighorn River	113 cfs	Low	−2.0 cfs	44 mi
Powder River at ArvadaRiver gauge, Powder River	39.8 cfs	Low	±0	46 mi
Little Bighorn River near Hardin MTRiver gauge, Little Bighorn River	2.65 ft	Below flood stage	−0.01 ft	56 mi
Agency Canal Tailwaste near Hardin MTCanal gauge, Agency Canal Tailwaste	2.9 cfs	Normal	−0.8 cfs	56 mi

Questions and answers

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Tongue River at Tongue R Dam near Decker MT today?

On Oct 21, 2026, 12:30 AM MDT, the water level was 10.41 ft. Steady over the last 24 hours.

Is Tongue River at Tongue R Dam near Decker MT rising or falling?

Steady over the last 24 hours.

Is the level of Tongue River at Tongue R Dam near Decker MT normal?

Low for late October. Compared with 5 years of daily readings for this time of year.

What is the highest water level ever recorded at Tongue River at Tongue R Dam near Decker MT?

The highest level on record is 18.69 ft on May 30, 2019.

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:06307500 (Agency page)
Coordinates: 45.14128, -106.77136 (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
Water level	10.41 ft	2026-10-21 06:30	Provisional
Flow	98.3 cfs	2026-10-21 06:30	Provisional
Water temperature	53 °F	2026-10-21 06:30	Provisional

Download

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How to cite

U.S. Geological Survey: Tongue River at Tongue R Dam near Decker MT (usgs:06307500). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/montana/tongue-river-at-tongue-r-dam-near-decker-mt

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