Big Sandy Reservoir water level

Name: Big Sandy Reservoir water level (U.S. Bureau of Reclamation)
Creator: U.S. Bureau of Reclamation
License: https://www.usbr.gov/main/disclaim.html

Reservoir, Wyoming, United States

Directions

Normal for mid-October

Surface elevation

6,738.25ft Up 3.06 ft over the last 7 days

Measured Oct 17, 2026 (2 days ago)

Water stored: 7,226 acre‑ft

History

What this means

Big Sandy Reservoir is at 6,738.25 ft, in the normal range for mid-October.

That puts it 6.37 ft below the median of 6,744.62 ft for mid-October, based on 36 years of readings. A year ago it stood at 6,744.49 ft (−6.24 ft).

It has risen 3.06 ft over the past week. In the last month it has stayed between 6,733.28 ft and 6,738.25 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: 6,744.62 ft6.37 ft below the median for this date
Normal for this date: 6,730.04 ft – 6,750.94 ft8 years in 10 fall in this range (36 years of records)
Same day last year: 6,744.49 ft−6.24 ft
Lowest and highest in 30 days: 6,733.28 ft – 6,738.25 ft
Lowest and highest in 12 months: 6,732.50 ft – 6,754.57 ft

On the water at Big Sandy Reservoir

Normal levels mean few surprises on the water: ramps in use and the shoreline where you expect it.

Wear a life jacket on the water. Most boating deaths involve people who were not wearing one.

Weather at the gauge

No rain in the last 3 days.

18 Sun 61° 24° – Wind 9 mph

19 Mon 62° 31° – Wind 6 mph

20 Tue 60° 38° – Wind 6 mph

21 Wed 62° 46° – Wind 8 mph

22 Thu 62° 47° – Wind 18 mph

23 Fri 52° 43° 0.09 in, 59% Wind 19 mph

24 Sat 50° 41° 0.04 in, 23% Wind 9 mph

Forecast: Open-Meteo

Sunrise 07:35 AM Sunset 06:33 PM Daylight 10 hr, 58 min First quarter 53%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Big Sandy Reservoir near FarsonReservoir, Big Sandy Reservoir	6,738.40 ft	Below flood stage	+0.27 ft	1.3 mi
Eden ReservoirReservoir	6,704.39 ft	Normal		4.3 mi
Big Sandy River at Gasson Bridge, near EdenRiver gauge, Big Sandy River	28.8 cfs	Low	+3.7 cfs	26 mi
East Fork River above East Fork Canal, near BoulderRiver gauge, East Fork River	16.27 ft	No reference yet	−0.03 ft	29 mi
New Fork River near Big PineyRiver gauge, New Fork River	2.82 ft	Below flood stage	±0	33 mi
East Fork at New ForkRiver gauge, East Fork	92.6 cfs	Very high	−4.7 cfs	33 mi
Green River below Fontenelle ReservoirRiver gauge, Green River	11.11 ft	Below flood stage	+0.01 ft	36 mi
Fontenelle ReservoirReservoir	6,498.39 ft	High		37 mi

Questions and answers

How does Big Sandy Reservoir compare with last year?

It is 6.24 ft lower than on the same day last year, when the reading was 6,744.49 ft.

What is a normal level for Big Sandy Reservoir in mid-October?

The median for mid-October is 6,744.62 ft. In 8 years out of 10 the reading falls between 6,730.04 ft and 6,750.94 ft, based on 36 years of records.

Is Big Sandy Reservoir really 6,738.25 ft deep?

No. 6,738.25 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 Big Sandy Reservoir today?

On Oct 17, 2026, the surface elevation was 6,738.25 ft. Up 3.06 ft over the last 7 days.

Is Big Sandy Reservoir rising or falling?

Up 3.06 ft over the last 7 days.

Is the level of Big Sandy Reservoir normal?

Normal 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:277 (Agency page)
Coordinates: 42.26841, -109.43201 (WGS84)
Update interval: once a day
Licence: Public domain. Data: U.S. Bureau of Reclamation (RISE), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Surface elevation	6,738.25 ft	2026-10-17 07:00	Provisional
Water stored	7,226 acre‑ft	2026-10-17 07:00	Provisional

Download

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How to cite

U.S. Bureau of Reclamation: Big Sandy Reservoir (usbr:277). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/wyoming/big-sandy-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.

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