Reservoir · Washington · United States · BOR RISE
Conconully Reservoir
Conconully Reservoir and Dam
7.7% full
Capacity
16.04 hm³
Volume stored
1 hm³
Coordinates
48.538°N, 119.747°W
Last updated
2026-09-30
Current fill
7.7%vs 7 days ago
+0.6%gaining
vs 1 year ago
-28.9%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: 2026-09-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 48.538, -119.747 · Open in Google Maps
About Conconully Reservoir
As of September 30, 2026, Conconully Reservoir is filled to 7.7% of its total capacity, holding roughly 1 hm³ of water out of a maximum 16 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (+0.6 pts), and it is 28.9 points below its level on the same date a year earlier.
Across the readings we hold for Conconully Reservoir — 1815 data points between October 2, 2021 and September 30, 2026 — the level has ranged from a low of 6.8% (September 15, 2026) to a high of 101.4% (May 17, 2023). On average the reservoir is fullest around June and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the Washington basin at 48.538°N, 119.747°W.
Key facts
- Current fill level
- 7.7%
- Water stored
- 1 hm³
- Total capacity
- 16 hm³
- 7-day change
- ▲ 0.6 pts
- Year-on-year
- ▼ 28.9 pts
- Primary use
- Multipurpose
- River basin
- Washington
- Operator
- BOR
- Coordinates
- 48.538°N, 119.747°W
- Last updated
- September 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Sep 2026 | 7.7% | 1 |
| 29 Sep 2026 | 7.7% | 1 |
| 28 Sep 2026 | 7.6% | 1 |
| 27 Sep 2026 | 7.5% | 1 |
| 26 Sep 2026 | 7.4% | 1 |
| 25 Sep 2026 | 7.2% | 1 |
| 24 Sep 2026 | 7.0% | 1 |
| 23 Sep 2026 | 7.1% | 1 |
| 22 Sep 2026 | 7.0% | 1 |
| 21 Sep 2026 | 7.0% | 1 |
| 20 Sep 2026 | 7.0% | 1 |
| 19 Sep 2026 | 6.9% | 1 |