Reservoir · Idaho · United States · BOR RISE
Ririe Reservoir
Ririe Reservoir and Dam
26.1% full
Capacity
111.63 hm³
Volume stored
29 hm³
Coordinates
43.582°N, 111.743°W
Last updated
2026-09-30
Current fill
26.1%vs 7 days ago
-0.5%losing
vs 1 year ago
-27.4%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: 2026-09-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.582, -111.743 · Open in Google Maps
About Ririe Reservoir
As of September 30, 2026, Ririe Reservoir is filled to 26.1% of its total capacity, holding roughly 29 hm³ of water out of a maximum 112 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.5 pts), and it is 27.4 points below its level on the same date a year earlier.
Across the readings we hold for Ririe Reservoir — 2188 data points between October 2, 2021 and September 30, 2026 — the level has ranged from a low of 26.1% (September 30, 2026) to a high of 89.6% (April 30, 2024). 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 43.582°N, 111.743°W.
Key facts
- Current fill level
- 26.1%
- Water stored
- 29 hm³
- Total capacity
- 112 hm³
- 7-day change
- ▼ 0.5 pts
- Year-on-year
- ▼ 27.4 pts
- Primary use
- Multipurpose
- River basin
- Idaho
- Operator
- BOR
- Coordinates
- 43.582°N, 111.743°W
- Last updated
- September 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Sep 2026 | 26.1% | 29 |
| 29 Sep 2026 | 26.2% | 29 |
| 28 Sep 2026 | 26.2% | 29 |
| 27 Sep 2026 | 26.3% | 29 |
| 26 Sep 2026 | 26.4% | 29 |
| 25 Sep 2026 | 26.4% | 30 |
| 24 Sep 2026 | 26.5% | 30 |
| 23 Sep 2026 | 26.6% | 30 |
| 22 Sep 2026 | 26.6% | 30 |
| 21 Sep 2026 | 26.7% | 30 |
| 20 Sep 2026 | 26.7% | 30 |
| 19 Sep 2026 | 26.7% | 30 |