Lake levels › Idaho

Reservoir A water level today

Normal for this time of year

1,789.41ft

feet above sea level ·

vs normal for Oct 10+0.2 ft
24 hours−0.10 ft
7 days−1.0 ft
30 days−0.2 ft

Is Reservoir A low right now?

Reservoir A was at 1,789.41 ft on October 10, 2026. That is 0.24 ft above the typical level for October 10, within the normal range. Over the past week the lake has been falling about 0.15 ft a day.

Last 12 monthsDaily level Normal range (10–90% of past years)
1,7831,7881,7941,8001,805NovDecJanFebMarAprMayJunJulAugSepOct

Reservoir A on Oct 10 in past years

20251,787.5+1.9
20241,787.2+2.2
20231,789.3+0.1
20221,789.8−0.4
20211,787.2+2.2
20201,793.4−4.0

Level on the same date each year, and how today compares.

Daily levels, last two weeks

DateLevel (ft)Change
Oct 91,789.41−0.10
Oct 81,789.51−0.18
Oct 71,789.69−0.13
Oct 61,789.82−0.16
Oct 51,789.98−0.18
Oct 41,790.16−0.14
Oct 31,790.30−0.14
Oct 21,790.44−0.16
Oct 11,790.60−0.13
Sep 301,790.73−0.10
Sep 291,790.83+0.02
Sep 281,790.81+0.07
Sep 271,790.74+0.06
Sep 261,790.68+0.08

Daily means of the operator's readings (midnight to midnight, local time).

About Reservoir A

10-year range
1,779.3 ft (October 30, 2015) to 1,803.9 ft (June 13, 2022)
Operated by
U.S. Army Corps of Engineers
Data
U.S. Army Corps of Engineers — NWDP district, RSA
Datum
NGVD29

Lakes near Reservoir A

Questions

Is Reservoir A low right now?

Reservoir A was at 1,789.41 ft on October 10, 2026. That is 0.24 ft above the typical level for October 10, within the normal range. Over the past week the lake has been falling about 0.15 ft a day.

How often is the Reservoir A level updated?

The operator reports every 15 minutes to an hour. This page refreshes several times a day; the time of the latest reading is shown next to the level.

Where does this data come from?

U.S. Army Corps of Engineers (NWDP district, RSA). Readings are provisional and can be revised.