Reservoir · Idaho · United States · BOR RISE
Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN)
42.3% full
Capacity
259.28 hm³
Volume stored
110 hm³
Coordinates
42.670°N, 113.483°W
Last updated
2026-07-28
Current fill
42.3%vs 7 days ago
0.0%stable
vs 1 year ago
+2.1%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. 42.670, -113.483 · Open in Google Maps
About Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN)
As of July 28, 2026, Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) is filled to 42.3% of its total capacity, holding roughly 110 hm³ of water out of a maximum 259 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 (+0.0 pts), and it is 2.1 points above its level on the same date a year earlier.
Across the readings we hold for Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) — 2186 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 10.0% (October 12, 2021) to a high of 46.1% (May 27, 2024). On average the reservoir is fullest around May and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the Idaho basin at 42.670°N, 113.483°W.
Key facts
- Current fill level
- 42.3%
- Water stored
- 110 hm³
- Total capacity
- 259 hm³
- 7-day change
- No change
- Year-on-year
- ▲ 2.1 pts
- Primary use
- Multipurpose
- River basin
- Idaho
- Operator
- BOR
- Coordinates
- 42.670°N, 113.483°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 42.3% | 110 |
| 27 Jul 2026 | 42.3% | 110 |
| 26 Jul 2026 | 42.5% | 110 |
| 25 Jul 2026 | 42.6% | 111 |
| 24 Jul 2026 | 42.6% | 111 |
| 23 Jul 2026 | 42.6% | 111 |
| 22 Jul 2026 | 42.5% | 110 |
| 21 Jul 2026 | 42.5% | 110 |
| 20 Jul 2026 | 42.3% | 110 |
| 19 Jul 2026 | 42.1% | 109 |
| 18 Jul 2026 | 41.5% | 108 |
| 17 Jul 2026 | 41.2% | 107 |
Frequently asked questions
What is the current water level of Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN)?
As of July 28, 2026, Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) is at 42.3% of its capacity, holding approximately 110 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) reservoir full?
No. As of July 28, 2026, Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) is within its normal operating range at 42.3% of its capacity, so it is not full.
Is the water level at Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) rising or falling?
The level at Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) has been broadly stable over the latest week on record (0.0 points).
How much water can Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) hold?
Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) has a total capacity of 259 hm³.
Where is Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) reservoir located?
Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) is located in Idaho, United States, within the Idaho basin (coordinates 42.670°N, 113.483°W).
What is Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) used for?
Lake Walcott, Minidoka Dam, and Minidoka Powerplant (MIN) is used primarily for multiple purposes, and is managed by BOR.