Reservoir · Idaho · United States · BOR RISE
Milner Lake and Dam
99.3% full
Capacity
48.11 hm³
Volume stored
48 hm³
Coordinates
42.523°N, 114.014°W
Last updated
2026-08-12
Current fill
99.3%vs 7 days ago
+0.9%gaining
vs 1 year ago
+2.9%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: 2026-08-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.523, -114.014 · Open in Google Maps
About Milner Lake and Dam
As of August 12, 2026, Milner Lake and Dam is filled to 99.3% of its total capacity, holding roughly 48 hm³ of water out of a maximum 48 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.9 pts), and it is 2.9 points above its level on the same date a year earlier.
Across the readings we hold for Milner Lake and Dam — 2188 data points between August 15, 2021 and August 12, 2026 — the level has ranged from a low of 62.7% (October 14, 2022) to a high of 105.0% (April 30, 2024). On average the reservoir is fullest around July and at its lowest around November.
It is operated by BOR primarily for multiple purposes. It lies within the Idaho basin at 42.523°N, 114.014°W.
Key facts
- Current fill level
- 99.3%
- Water stored
- 48 hm³
- Total capacity
- 48 hm³
- 7-day change
- ▲ 0.9 pts
- Year-on-year
- ▲ 2.9 pts
- Primary use
- Multipurpose
- River basin
- Idaho
- Operator
- BOR
- Coordinates
- 42.523°N, 114.014°W
- Last updated
- August 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Aug 2026 | 99.3% | 48 |
| 11 Aug 2026 | 98.8% | 48 |
| 10 Aug 2026 | 98.4% | 47 |
| 9 Aug 2026 | 98.4% | 47 |
| 8 Aug 2026 | 98.6% | 47 |
| 7 Aug 2026 | 98.8% | 48 |
| 6 Aug 2026 | 98.6% | 47 |
| 5 Aug 2026 | 98.4% | 47 |
| 4 Aug 2026 | 98.7% | 48 |
| 3 Aug 2026 | 99.8% | 48 |
| 2 Aug 2026 | 97.4% | 47 |
| 1 Aug 2026 | 97.2% | 47 |
Frequently asked questions
What is the current water level of Milner Lake and Dam?
As of August 12, 2026, Milner Lake and Dam is at 99.3% of its capacity, holding approximately 48 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Milner Lake and Dam reservoir full?
Milner Lake and Dam is essentially full, sitting at 99.3% of capacity as of August 12, 2026.
Is the water level at Milner Lake and Dam rising or falling?
The level at Milner Lake and Dam has been broadly stable over the latest week on record (+0.9 points).
How much water can Milner Lake and Dam hold?
Milner Lake and Dam has a total capacity of 48 hm³.
Where is Milner Lake and Dam reservoir located?
Milner Lake and Dam is located in Idaho, United States, within the Idaho basin (coordinates 42.523°N, 114.014°W).
What is Milner Lake and Dam used for?
Milner Lake and Dam is used primarily for multiple purposes, and is managed by BOR.