Reservoir · Idaho · United States · BOR RISE
Anderson Ranch Reservoir, Dam, and Powerplant (AND)
66.7% full
Capacity
572.6 hm³
Volume stored
382 hm³
Coordinates
43.360°N, 115.450°W
Last updated
2026-07-28
Current fill
66.7%vs 7 days ago
-0.5%losing
vs 1 year ago
-21.4%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.360, -115.450 · Open in Google Maps
About Anderson Ranch Reservoir, Dam, and Powerplant (AND)
As of July 28, 2026, Anderson Ranch Reservoir, Dam, and Powerplant (AND) is filled to 66.7% of its total capacity, holding roughly 382 hm³ of water out of a maximum 573 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.5 pts), and it is 21.4 points below its level on the same date a year earlier.
Across the readings we hold for Anderson Ranch Reservoir, Dam, and Powerplant (AND) — 2188 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 29.8% (February 8, 2022) to a high of 89.1% (May 14, 2026). On average the reservoir is fullest around June and at its lowest around November.
It is operated by BOR primarily for multiple purposes. It lies within the Idaho basin at 43.360°N, 115.450°W.
Key facts
- Current fill level
- 66.7%
- Water stored
- 382 hm³
- Total capacity
- 573 hm³
- 7-day change
- ▼ 0.5 pts
- Year-on-year
- ▼ 21.4 pts
- Primary use
- Multipurpose
- River basin
- Idaho
- Operator
- BOR
- Coordinates
- 43.360°N, 115.450°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 66.7% | 382 |
| 27 Jul 2026 | 67.2% | 385 |
| 26 Jul 2026 | 67.8% | 388 |
| 25 Jul 2026 | 68.3% | 391 |
| 24 Jul 2026 | 68.8% | 394 |
| 23 Jul 2026 | 69.3% | 397 |
| 22 Jul 2026 | 69.8% | 400 |
| 21 Jul 2026 | 70.3% | 403 |
| 20 Jul 2026 | 70.8% | 405 |
| 19 Jul 2026 | 71.3% | 408 |
| 18 Jul 2026 | 71.8% | 411 |
| 17 Jul 2026 | 72.3% | 414 |
Frequently asked questions
What is the current water level of Anderson Ranch Reservoir, Dam, and Powerplant (AND)?
As of July 28, 2026, Anderson Ranch Reservoir, Dam, and Powerplant (AND) is at 66.7% of its capacity, holding approximately 382 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Anderson Ranch Reservoir, Dam, and Powerplant (AND) reservoir full?
No. As of July 28, 2026, Anderson Ranch Reservoir, Dam, and Powerplant (AND) is within its normal operating range at 66.7% of its capacity, so it is not full.
Is the water level at Anderson Ranch Reservoir, Dam, and Powerplant (AND) rising or falling?
The level at Anderson Ranch Reservoir, Dam, and Powerplant (AND) has been broadly stable over the latest week on record (-0.5 points).
How much water can Anderson Ranch Reservoir, Dam, and Powerplant (AND) hold?
Anderson Ranch Reservoir, Dam, and Powerplant (AND) has a total capacity of 573 hm³.
Where is Anderson Ranch Reservoir, Dam, and Powerplant (AND) reservoir located?
Anderson Ranch Reservoir, Dam, and Powerplant (AND) is located in Idaho, United States, within the Idaho basin (coordinates 43.360°N, 115.450°W).
What is Anderson Ranch Reservoir, Dam, and Powerplant (AND) used for?
Anderson Ranch Reservoir, Dam, and Powerplant (AND) is used primarily for multiple purposes, and is managed by BOR.