Reservoir · Washington · United States · BOR RISE
Bumping Lake and Bumping Lake Dam (BUM)
100.8% full
Capacity
41.57 hm³
Volume stored
42 hm³
Coordinates
46.871°N, 121.299°W
Last updated
2026-06-11
Current fill
100.8%vs 7 days ago
0.0%stable
vs 1 year ago
+5.7%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: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 46.871, -121.299 · Open in Google Maps
About Bumping Lake and Bumping Lake Dam (BUM)
As of June 11, 2026, Bumping Lake and Bumping Lake Dam (BUM) is filled to 100.8% of its total capacity, holding roughly 42 hm³ of water out of a maximum 42 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 5.7 points above its level on the same date a year earlier.
Across the readings we hold for Bumping Lake and Bumping Lake Dam (BUM) — 2189 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 11.0% (November 10, 2024) to a high of 105.0% (December 17, 2025). 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 46.871°N, 121.299°W.
Key facts
- Current fill level
- 100.8%
- Water stored
- 42 hm³
- Total capacity
- 42 hm³
- 7-day change
- No change
- Year-on-year
- ▲ 5.7 pts
- Primary use
- Multipurpose
- River basin
- Washington
- Operator
- BOR
- Coordinates
- 46.871°N, 121.299°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 100.8% | 42 |
| 10 Jun 2026 | 100.8% | 42 |
| 9 Jun 2026 | 100.6% | 42 |
| 8 Jun 2026 | 99.7% | 41 |
| 7 Jun 2026 | 99.5% | 41 |
| 6 Jun 2026 | 99.4% | 41 |
| 5 Jun 2026 | 99.3% | 41 |
| 4 Jun 2026 | 99.1% | 41 |
| 3 Jun 2026 | 98.9% | 41 |
| 2 Jun 2026 | 98.8% | 41 |
| 1 Jun 2026 | 98.8% | 41 |
| 31 May 2026 | 99.4% | 41 |
Frequently asked questions
What is the current water level of Bumping Lake and Bumping Lake Dam (BUM)?
As of June 11, 2026, Bumping Lake and Bumping Lake Dam (BUM) is at 100.8% of its capacity, holding approximately 42 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Bumping Lake and Bumping Lake Dam (BUM) reservoir full?
Bumping Lake and Bumping Lake Dam (BUM) is essentially full, sitting at 100.8% of capacity as of June 11, 2026.
Is the water level at Bumping Lake and Bumping Lake Dam (BUM) rising or falling?
The level at Bumping Lake and Bumping Lake Dam (BUM) has been broadly stable over the latest week on record (0.0 points).
How much water can Bumping Lake and Bumping Lake Dam (BUM) hold?
Bumping Lake and Bumping Lake Dam (BUM) has a total capacity of 42 hm³.
Where is Bumping Lake and Bumping Lake Dam (BUM) reservoir located?
Bumping Lake and Bumping Lake Dam (BUM) is located in Washington, United States, within the Washington basin (coordinates 46.871°N, 121.299°W).
What is Bumping Lake and Bumping Lake Dam (BUM) used for?
Bumping Lake and Bumping Lake Dam (BUM) is used primarily for multiple purposes, and is managed by BOR.