Cowlitz River below Mayfield Dam water level

Name: Cowlitz River below Mayfield Dam 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, Cowlitz River, Washington, United States

Directions

Normal for mid-October

Water level

10.63ft Steady over the last 24 hours

Measured Oct 17, 2026, 07:15 AM PDT (1 hour ago)

Flow: 3,570 cfs

History

7 days

Water level Normal range (10–90 %)

What this means

The Cowlitz River below Mayfield Dam is at 10.63 ft, in the normal range for mid-October.

That puts it 0.02 ft above the median of 10.61 ft for mid-October, based on 23 years of readings.

The level has held steady over the past 24 hours. In the last month it has stayed between 10.63 ft and 10.66 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 23 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 10.61 ft0.02 ft above the median for this date
Normal for this date: 9.85 ft – 11.82 ft8 years in 10 fall in this range (23 years of records)

Floating and fishing near Cowlitz River below Mayfield Dam

Normal flows mean predictable rapids and good access at most put-ins.

Weather at the gauge

No rain in the last 3 days.

17 Sat 62° 45° 0.04 in, 64% Wind 7 mph

18 Sun 62° 40° – Wind 7 mph

19 Mon 59° 44° – Wind 4 mph

20 Tue 65° 41° – Wind 4 mph

21 Wed 67° 43° – Wind 5 mph

22 Thu 59° 43° 0.02 in, 27% Wind 5 mph

23 Fri 54° 40° 0.01 in Wind 4 mph

Forecast: Open-Meteo

Sunrise 07:31 AM Sunset 06:22 PM Daylight 10 hr, 50 min First quarter 41%

Map

Other gauges on the Cowlitz River

Gauge	Level	Compared with normal	24 hours	Distance
Cowlitz River at PackwoodRiver gauge, Cowlitz River	0.90 ft	Very low	+0.02 ft	45 mi
Cowlitz River at RandleRiver gauge, Cowlitz River	3.69 ft	Normal	±0	31 mi
Cowlitz River near KosmosRiver gauge, Cowlitz River	471 cfs	Very low	+19.0 cfs	24 mi
Cowlitz River at Castle RockRiver gauge, Cowlitz River	33.65 ft	Very high	−0.01 ft	22 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
South Fork Newaukum River near OnalaskaRiver gauge, South Fork Newaukum River	22.5 cfs	Very low	+0.6 cfs	5.6 mi
Tilton River above Bear Canyon Creek near CinebarRiver gauge, Tilton River	2.22 ft	Low	+0.01 ft	9 mi
Nf Toutle River below Srs near Kid ValleyRiver gauge, Nf Toutle River	142 cfs	Very low	−17.0 cfs	10 mi
Toutle River at Tower Road near Silver LakeRiver gauge, Toutle River	120.08 ft	High	±0	16 mi
Newaukum River near ChehalisRiver gauge, Newaukum River	192.37 ft	Below flood stage	±0	17 mi
Skookumchuck River near VailRiver gauge, Skookumchuck River	15.2 cfs	Very low	−0.4 cfs	18 mi
Skookumchuck River below Bldy Run Creek near CentraliaRiver gauge, Skookumchuck River	325.99 ft	Highest on record	±0	20 mi
Skookumchuck River near BucodaRiver gauge, Skookumchuck River	203.69 ft	Below flood stage	+0.07 ft	23 mi

Questions and answers

What is a normal level for the Cowlitz River below Mayfield Dam in mid-October?

The median for mid-October is 10.61 ft. In 8 years out of 10 the reading falls between 9.85 ft and 11.82 ft, based on 23 years of records.

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 Cowlitz River below Mayfield Dam today?

On Oct 17, 2026, 07:15 AM PDT, the water level was 10.63 ft. Steady over the last 24 hours.

Is Cowlitz River below Mayfield Dam rising or falling?

Steady over the last 24 hours.

Is the level of Cowlitz River below Mayfield Dam normal?

Normal for mid-October. Compared with 23 years of daily readings for this time of year.

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:14238000 (Agency page)
Coordinates: 46.51039, -122.61622 (WGS84)
Vertical datum: NGVD29
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	10.63 ft	2026-10-17 14:15	Provisional
Flow	3,570 cfs	2026-10-17 14:15	Provisional

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How to cite

U.S. Geological Survey: Cowlitz River below Mayfield Dam (usgs:14238000). Accessed October 17, 2026 via Nivelmap, https://nivelmap.com/en/united-states/washington/cowlitz-river-below-mayfield-dam

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