Big Sandy Reservoir

Name: Big Sandy Reservoir (Wyoming) water level
Creator: U.S. Bureau of Reclamation

Wyoming · Reclamation gauge

Grey bar: 12-month range 6,732.6–6,754.6 ft.

Water level · EGM96

6,739.57FT

Storage 8,281 acre-feet

The source publishes no % full figure.

7 days +1.32 ft30 days +5.69 ftvs last year −5.11 ft

Reading for Oct 24, 2026 · page refreshed Oct 25, 20:24 UTC
Source: U.S. Bureau of Reclamation (RISE)

Worth going today?This Afternoon

Looks good

Light wind, dry

Wind5 to 8 mph

Rain24%

Temp50°F

Level6,739.6 ft

This AfternoonIsolated Rain Showers · 50°F
ESE 5 to 8 mph · rain 24%

TonightIsolated Rain Showers then Patchy Fog · 28°F
NE 3 to 10 mph · rain 20%

NWS forecast for the gauge location. Good = wind ≤ 10 mph and rain ≤ 30%; storms are flagged. Not safety advice – check local conditions, closures and warnings.

Level history

30 days1 year

Field notes

Big Sandy Reservoir's latest daily level (Oct 24, 2026) is 6,739.57 (EGM96) ft.

Reclamation reports storage of 8,281 acre-feet for the same day.

Over the past 7 days the lake has been rising (+1.32 ft), and it is +5.69 ft over 30 days.

Compared with a year ago (6,744.68 ft), the lake is 5.11 ft lower.

Readings come from the Bureau of Reclamation's daily reservoir data for Big Sandy Reservoir and Dam.

Lake facts

Storage (latest)	8,281 acre-feet
Gauge / station	Big Sandy Reservoir and Dam
Elevation datum	ft (EGM96)
Gauge location	42.2684, -109.4320

Nearby lakes

Eden Reservoir4 mi SE6,704.36 ft−0.03 ft Fontenelle Reservoir37 mi SW6,498.74 ft+0.35 ft Bull Lake Reservoir68 mi N5,776.88 ft+1.07 ft Pilot Butte Reservoir73 mi NE5,453.52 ft−0.11 ft Flaming Gorge Reservoir89 mi S · UT6,005.23 ft−0.59 ft

Common questions

Is Big Sandy Reservoir rising or falling?

Over the last 7 days it changed +1.32 ft and over 30 days +5.69 ft.

How full is Big Sandy Reservoir?

Reclamation publishes the water surface elevation for this gauge but not a percent-full figure, so we don't show one rather than estimate it.

How often is this page updated?

The page is rebuilt automatically every day from Reclamation's published data. Values can be revised later by the source agency.

Where does the data come from?

The U.S. Bureau of Reclamation's RISE data portal (data.usbr.gov). Forecasts come from the National Weather Service.

Daily values published by the Bureau of Reclamation; provisional and subject to revision. Reclamation data are provisional and subject to revision unless otherwise noted. This page is not affiliated with or endorsed by the Bureau of Reclamation. See data sources.