Anderson Ranch Reservoir water level
▼ 1.7 points from 52.3% a year ago
Source: data.usbr.gov/rise/api/catalog-item/129153, accessed October 1, 2026. Updated every 6 hours.
Anderson Ranch Reservoir is at 50.7% of full pool (4151.95 ft) as of September 27, 2026. Anderson Ranch Reservoir is near Mountain Home, Idaho.
Anderson Ranch Reservoir level history
This site counts a reservoir as full on a day its storage is at or above 95% of the dam's normal storage (National Inventory of Dams). Many reservoirs rarely reach 100%, even in wet years, because operators release water for irrigation, power or flood control before they fill, so this site treats 95% as full. Highs and lows are daily readings in the published data, not official records. Source: Bureau of Reclamation daily data.
Storage, % of full pool, since 1945
Anderson Ranch Reservoir is falling: 50.9% full, down 0.2 percentage points since September 20, 2026.
On this same date last year (September 28, 2025), Anderson Ranch Reservoir was 52.3% full, 1.4 percentage points higher than today's 50.9%.
Weekly averages of the source's daily readings; older years may be monthly or sparser where that is all the source published. Download the charted data (JSON).
Anderson Ranch Reservoir map
Anderson Ranch Reservoir is at 43.3588, -115.4491. Open in OpenStreetMap.
The dam
- Flood control
- Hydropower
- Irrigation
Sources: nid.sec.usace.army.mil, accessed September 29, 2026
On the water
No campgrounds, boat ramps, or swim spots linked to Anderson Ranch Reservoir yet.
Common questions
- Anderson Ranch Reservoir is at 50.7% of full pool (4151.95 ft) as of September 27, 2026.
- Anderson Ranch Reservoir has not been full in the data: its storage never reached 95% of normal storage. This site counts a reservoir as full on a day its storage is at or above 95% of the dam's normal storage (National Inventory of Dams). Many reservoirs rarely reach 100%, even in wet years, because operators release water for irrigation, power or flood control before they fill, so this site treats 95% as full. Based on Bureau of Reclamation daily data since October 1, 1945.
- In Bureau of Reclamation daily data since October 1, 1945, Anderson Ranch Reservoir's highest storage was 93.2% of normal storage on June 11, 1983. Its lowest since October 1, 1945 was -8.8% of normal storage on October 1, 1945. These are the highest and lowest daily readings in the published data, not official records.
- Anderson Ranch Reservoir is near Mountain Home, Idaho (43.3588, -115.4491).
- Bureau of Reclamation operates the dam at Anderson Ranch Reservoir.
- Anderson Ranch Reservoir's dam is used for Flood control, Hydropower, Irrigation.