Reservoir · Idaho · United States · BOR RISE
Lake Lowell
Lake Lowell and Deer Flat Dams
71.7% full
Capacity
196.57 hm³
Volume stored
141 hm³
Coordinates
43.583°N, 116.733°W
Last updated
2026-09-30
Current fill
71.7%vs 7 days ago
+0.6%gaining
vs 1 year ago
+3.7%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: 2026-09-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.583, -116.733 · Open in Google Maps
About Lake Lowell
As of September 30, 2026, Lake Lowell is filled to 71.7% of its total capacity, holding roughly 141 hm³ of water out of a maximum 197 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 (+0.6 pts), and it is 3.7 points above its level on the same date a year earlier.
Across the readings we hold for Lake Lowell — 2188 data points between October 2, 2021 and September 30, 2026 — the level has ranged from a low of 34.6% (August 23, 2024) to a high of 95.7% (May 25, 2025). On average the reservoir is fullest around May and at its lowest around August.
It is operated by BOR primarily for multiple purposes. It lies within the Idaho basin at 43.583°N, 116.733°W.
Key facts
- Current fill level
- 71.7%
- Water stored
- 141 hm³
- Total capacity
- 197 hm³
- 7-day change
- ▲ 0.6 pts
- Year-on-year
- ▲ 3.7 pts
- Primary use
- Multipurpose
- River basin
- Idaho
- Operator
- BOR
- Coordinates
- 43.583°N, 116.733°W
- Last updated
- September 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Sep 2026 | 71.7% | 141 |
| 29 Sep 2026 | 71.6% | 141 |
| 28 Sep 2026 | 71.2% | 140 |
| 27 Sep 2026 | 70.8% | 139 |
| 26 Sep 2026 | 70.8% | 139 |
| 25 Sep 2026 | 70.8% | 139 |
| 24 Sep 2026 | 71.0% | 140 |
| 23 Sep 2026 | 71.1% | 140 |
| 22 Sep 2026 | 71.1% | 140 |
| 21 Sep 2026 | 71.0% | 140 |
| 20 Sep 2026 | 70.7% | 139 |
| 19 Sep 2026 | 70.4% | 138 |