Reservoir · Washington · United States · BOR RISE
Conconully Reservoir and Dam
30.6% full
Capacity
16.04 hm³
Volume stored
5 hm³
Coordinates
48.538°N, 119.747°W
Last updated
2026-08-11
Current fill
30.6%vs 7 days ago
-5.1%losing
vs 1 year ago
-29.6%year-over-year
7-day trend
↓falling
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: 2026-08-11.
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 and Dam
As of August 11, 2026, Conconully Reservoir and Dam is filled to 30.6% of its total capacity, holding roughly 5 hm³ of water out of a maximum 16 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 5.1 percentage points, and it is 29.6 points below its level on the same date a year earlier.
Across the readings we hold for Conconully Reservoir and Dam — 1817 data points between August 15, 2021 and August 11, 2026 — the level has ranged from a low of 17.6% (September 29, 2021) 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
- 30.6%
- Water stored
- 5 hm³
- Total capacity
- 16 hm³
- 7-day change
- ▼ 5.1 pts
- Year-on-year
- ▼ 29.6 pts
- Primary use
- Multipurpose
- River basin
- Washington
- Operator
- BOR
- Coordinates
- 48.538°N, 119.747°W
- Last updated
- August 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Aug 2026 | 30.6% | 5 |
| 8 Aug 2026 | 32.9% | 5 |
| 7 Aug 2026 | 33.6% | 5 |
| 6 Aug 2026 | 34.3% | 6 |
| 5 Aug 2026 | 35.0% | 6 |
| 4 Aug 2026 | 35.7% | 6 |
| 3 Aug 2026 | 36.5% | 6 |
| 2 Aug 2026 | 37.2% | 6 |
| 1 Aug 2026 | 38.0% | 6 |
| 31 Jul 2026 | 38.8% | 6 |
| 30 Jul 2026 | 39.5% | 6 |
| 29 Jul 2026 | 40.2% | 6 |
Frequently asked questions
What is the current water level of Conconully Reservoir and Dam?
As of August 11, 2026, Conconully Reservoir and Dam is at 30.6% of its capacity, holding approximately 5 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Conconully Reservoir and Dam reservoir full?
No. As of August 11, 2026, Conconully Reservoir and Dam is low at 30.6% of its capacity, so it is not full.
Is the water level at Conconully Reservoir and Dam rising or falling?
The level at Conconully Reservoir and Dam is falling — it dropped 5.1 percentage points over the latest week on record.
How much water can Conconully Reservoir and Dam hold?
Conconully Reservoir and Dam has a total capacity of 16 hm³.
Where is Conconully Reservoir and Dam reservoir located?
Conconully Reservoir and Dam is located in Washington, United States, within the Washington basin (coordinates 48.538°N, 119.747°W).
What is Conconully Reservoir and Dam used for?
Conconully Reservoir and Dam is used primarily for multiple purposes, and is managed by BOR.