States

Black Canyon Reservoir

Idaho · Reclamation gauge
2,4902,495
Grey bar: 12-month range 2,487.9–2,497.9 ft.
Water level · NAVD88
2,487.94FT
Storage 21,351 acre-feet
The source publishes no % full figure.
7 days −3.43 ft30 days −9.01 ft
Reading for Oct 24, 2026 · page refreshed Oct 25, 21:16 UTC
Source: U.S. Bureau of Reclamation (RISE)
Worth going today?This Afternoon
Looks good
Light wind, dry
Wind5 mph
Rain1%
Temp63°F
Level2,487.9 ft
This AfternoonSunny · 63°F
SSW 5 mph · rain 1%
TonightMostly Cloudy · 41°F
ENE 3 mph · rain 10%
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

2,4882,4902,4922,4942,496ftSep 24Oct 2Oct 9Oct 16Oct 24
2,4882,4902,4922,4942,496ftSep 24Oct 9Oct 24
2,4902,495ftJan 2026Mar 2026Jun 2026Aug 2026Oct 2026
2,4902,495ftJan 2026Jun 2026Oct 2026

Field notes

As of Oct 24, 2026, Black Canyon Reservoir stood at 2,487.94 (NAVD88) ft.

Reclamation reports storage of 21,351 acre-feet for the same day.

Over the past 7 days the lake has been falling (−3.43 ft), and it is −9.01 ft over 30 days.

Readings come from the Bureau of Reclamation's daily reservoir data for Black Canyon Reservoir, Diversion Dam, and Powerplant (EMM).

Lake facts

Storage (latest)21,351 acre-feet
Gauge / stationBlack Canyon Reservoir, Diversion Dam, and Powerplant (EMM)
Elevation datumft (NAVD88)
Gauge location43.9305, -116.4371

Nearby lakes

Lake Lowell28 mi SW2,525.57 ft−0.08 ftLucky Peak Lake34 mi SE2,946.04 ft+0.80 ftArrowrock Reservoir35 mi SE3,134.61 ft+3.69 ftMann Creek Reservoir39 mi NW2,825.97 ft+0.25 ftLake Owyhee45 mi SW · OR2,604.35 ft+0.44 ft

Common questions

Is Black Canyon Reservoir rising or falling?

Over the last 7 days it changed −3.43 ft and over 30 days −9.01 ft.

How full is Black Canyon 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. 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.