Reservoir · Washington · United States · BOR RISE
Kachess Lake and Dam
67.5% full
Capacity
294.8 hm³
Volume stored
199 hm³
Coordinates
47.265°N, 121.204°W
Last updated
2026-08-12
Current fill
67.5%vs 7 days ago
-3.7%losing
vs 1 year ago
+27.8%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: 2026-08-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 47.265, -121.204 · Open in Google Maps
About Kachess Lake and Dam
As of August 12, 2026, Kachess Lake and Dam is filled to 67.5% of its total capacity, holding roughly 199 hm³ of water out of a maximum 295 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 3.7 percentage points, and it is 27.8 points above its level on the same date a year earlier.
Across the readings we hold for Kachess Lake and Dam — 2187 data points between August 15, 2021 and August 12, 2026 — the level has ranged from a low of 8.5% (November 1, 2023) to a high of 99.8% (June 20, 2022). 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 47.265°N, 121.204°W.
Key facts
- Current fill level
- 67.5%
- Water stored
- 199 hm³
- Total capacity
- 295 hm³
- 7-day change
- ▼ 3.7 pts
- Year-on-year
- ▲ 27.8 pts
- Primary use
- Multipurpose
- River basin
- Washington
- Operator
- BOR
- Coordinates
- 47.265°N, 121.204°W
- Last updated
- August 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Aug 2026 | 67.5% | 199 |
| 11 Aug 2026 | 68.1% | 201 |
| 10 Aug 2026 | 68.6% | 202 |
| 9 Aug 2026 | 69.2% | 204 |
| 8 Aug 2026 | 69.7% | 205 |
| 7 Aug 2026 | 70.2% | 207 |
| 6 Aug 2026 | 70.7% | 208 |
| 5 Aug 2026 | 71.2% | 210 |
| 4 Aug 2026 | 71.6% | 211 |
| 3 Aug 2026 | 72.1% | 212 |
| 2 Aug 2026 | 72.5% | 214 |
| 1 Aug 2026 | 73.0% | 215 |
Frequently asked questions
What is the current water level of Kachess Lake and Dam?
As of August 12, 2026, Kachess Lake and Dam is at 67.5% of its capacity, holding approximately 199 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Kachess Lake and Dam reservoir full?
No. As of August 12, 2026, Kachess Lake and Dam is within its normal operating range at 67.5% of its capacity, so it is not full.
Is the water level at Kachess Lake and Dam rising or falling?
The level at Kachess Lake and Dam is falling — it dropped 3.7 percentage points over the latest week on record.
How much water can Kachess Lake and Dam hold?
Kachess Lake and Dam has a total capacity of 295 hm³.
Where is Kachess Lake and Dam reservoir located?
Kachess Lake and Dam is located in Washington, United States, within the Washington basin (coordinates 47.265°N, 121.204°W).
What is Kachess Lake and Dam used for?
Kachess Lake and Dam is used primarily for multiple purposes, and is managed by BOR.