Anderson Ranch Reservoir lake and shoreline

Anderson Ranch Reservoir Water Level

Idaho

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Anderson Ranch Reservoir is currently at a water-surface elevation of 4153.7 feet.

4153.67 ft · Updated 22 hours ago · USACE NWW District

Current level

4,153.67ft

Status unavailable

A verified operating range is not available for this lake.

Since last reading

Down 0.24 ft

Previous readingSep 94,153.91 ft

7-day change

Down 0.90 ft

7-day trend: Falling

5 daily readings in the last 7 days

30-day change

Down 0.90 ft

5 daily readings in the last 30 days

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Water Level History

Elevation (ft) Water-surface elevation (ft)

4154 ft4154 ft4154 ftSep 7Sep 11

Level status

Summary updating

This comparison needs the current level and full pool. We use the live feed when present, otherwise the latest daily summary when it includes a pool comparison.

DatumVertical reference for published pool and stage elevations at this lake (from the lake catalog).
Water-surface elevation (ft)
Elevation reference
Not available
Source
USACE NWW District

Reference levels

No published reference elevations for this lake.

Watershed drought

Moderate Drought

98% of watershed in official drought (D1+).

Severity

NoneExtreme
Trend
Stable

Watershed drought conditions

Elmore County, ID

Moderate Drought

Moderate Drought. Moderate drought is affecting the watershed.. Trend: Stable compared with last week. Official drought yes

Severity

NoneExtreme

Weekly trend

Stable

Compared with last week

Official drought

Yes

98% of the watershed is currently classified as official drought (D1+).

Expected impacts

  • Stream inflows may run below normal
  • Lake levels can decline faster between rain events
  • Vegetation stress may increase over time

U.S. Drought Monitor · map date Sep 8, 2026. Updated weekly. droughtmonitor.unl.eduView drought map for Elmore County, ID

Daily level summary

  • Sep 10, 2026

    4,153.67 ft

    -0.24 ft

  • Sep 9, 2026

    4,153.91 ft

    -0.22 ft

  • Sep 8, 2026

    4,154.13 ft

    -0.22 ft

  • Sep 7, 2026

    4,154.35 ft

    -0.22 ft

  • Sep 6, 2026

    4,154.57 ft

    —

Common questions about Anderson Ranch Reservoir’s water level

  • The current water level at Anderson Ranch Reservoir is 4,153.67 ft (updated 22 hours ago). You can track the Anderson Ranch Reservoir lake level on the interactive chart and daily history above.

  • The current 7-day trend for the Anderson Ranch Reservoir lake level is falling — falling about 0.90 ft over the past week. See the history chart above for the full picture.

  • Readings refresh when USACE NWW District publishes new gauge data — typically daily for most reservoirs. The timestamp above the chart shows when the latest observation arrived on Lake Insights.

Lake level glossary

Definitions for pool targets, datums, and how elevation readings are labeled.

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