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Thief Valley Reservoir water level

Reservoir, Oregon, United States

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Right now

Very low for mid-October

Surface elevation

3,096.44ft Steady over the last 7 days

Water stored
4 acre‑ft
3,100 3,110

History

History
3,1003,110ftOct 12Oct 13Oct 14Oct 15Oct 163,1003,110ftOct 12Oct 14Oct 16
3,1003,110ftSep 19Sep 25Oct 2Oct 9Oct 163,1003,110ftSep 19Oct 2Oct 16
3,1003,120ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20263,1003,120ftOct 2025Apr 2026Oct 2026
3,1003,1203,140ftOct 2016Apr 2019Oct 2021Apr 2024Oct 20263,1003,1203,140ftOct 2016Oct 2021Oct 2026
3,1003,120ftJanMarMayJulSepNov20263,1003,120ftJanAprJulOct2026

202120222023202420252026

Surface elevation Normal range (10–90 %)

What this means

Water is short at Thief Valley Reservoir: the latest reading of 3,096.44 ft is far below normal for mid-October.

That puts it 10.07 ft below the median of 3,106.51 ft for mid-October, based on 36 years of readings. A year ago it stood at 3,108.97 ft (−12.53 ft).

The level has held steady over the past week. The 30-day range is 3,096.43 ft – 3,096.45 ft.

Many reservoirs are drawn down through summer and fall; most of the refill comes later, with winter rain or spring snowmelt.

Compared with 36 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
3,106.51 ft10.07 ft below the median for this date
Normal for this date
3,097.23 ft – 3,117.34 ft8 years in 10 fall in this range (36 years of records)
Same day last year
3,108.97 ft−12.53 ft
Lowest and highest in 30 days
3,096.43 ft – 3,096.45 ft
Lowest and highest in 12 months
3,096.33 ft – 3,133.31 ft

Boating and fishing at Thief Valley Reservoir

At low levels, launching can mean a long walk or a closed ramp, and shallow points stick out further than charts suggest.

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.

17 Sat 71° 47° – Wind 18 mph
18 Sun 68° 42° – Wind 10 mph
19 Mon 71° 46° – Wind 17 mph
20 Tue 65° 44° – Wind 10 mph
21 Wed 62° 45° 0.09 in, 25% Wind 8 mph
22 Thu 56° 44° – Wind 12 mph
23 Fri 59° 39° – Wind 23 mph

Forecast: Open-Meteo

Sunrise 07:11 AM Sunset 06:02 PM Daylight 10 hr, 51 min First quarter 47%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Phillips Lake and MasonReservoir 3,983.22 ft Very low 26 mi
East Fork Wallowa River near JosephRiver gauge, East Fork Wallowa River 9.6 cfs High ±0 33 mi
Unity ReservoirReservoir 3,786.18 ft Normal 40 mi

Questions and answers

How does Thief Valley Reservoir compare with last year?

It is 12.53 ft lower than on the same day last year, when the reading was 3,108.97 ft.

What is a normal level for Thief Valley Reservoir in mid-October?

The median for mid-October is 3,106.51 ft. In 8 years out of 10 the reading falls between 3,097.23 ft and 3,117.34 ft, based on 36 years of records.

Is Thief Valley Reservoir really 3,096.44 ft deep?

No. 3,096.44 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 Thief Valley Reservoir today?

On Oct 16, 2026, the surface elevation was 3,096.44 ft. Steady over the last 7 days.

Is Thief Valley Reservoir rising or falling?

Steady over the last 7 days.

Is the level of Thief Valley Reservoir normal?

Very low for mid-October. Compared with 36 years of daily readings for this time of year.

How often is this data updated?

The U.S. Bureau of Reclamation publishes a new reading once a day. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Bureau of Reclamation
Station code
usbr:3668 (Agency page)
Coordinates
45.01300, -117.78108 (WGS84)
Update interval
once a day
Licence
Public domain. Data: U.S. Bureau of Reclamation (RISE), provisional data subject to revision

Published series

ParameterLast valueTime (UTC)Quality
Surface elevation 3,096.44 ft 2026-10-16 07:00 Provisional
Water stored 4 acre‑ft 2026-10-16 07:00 Provisional

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How to cite

U.S. Bureau of Reclamation: Thief Valley Reservoir (usbr:3668). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/oregon/thief-valley-reservoir

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.