Reservoir · Idaho · United States · BOR RISE
Lake Cascade and Cascade Dam
63.6% full
Capacity
855.05 hm³
Volume stored
544 hm³
Coordinates
44.525°N, 116.050°W
Last updated
2026-08-12
Current fill
63.6%vs 7 days ago
-2.5%losing
vs 1 year ago
-3.0%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. 44.525, -116.050 · Open in Google Maps
About Lake Cascade and Cascade Dam
As of August 12, 2026, Lake Cascade and Cascade Dam is filled to 63.6% of its total capacity, holding roughly 544 hm³ of water out of a maximum 855 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 2.5 percentage points, and it is 3.0 points below its level on the same date a year earlier.
Across the readings we hold for Lake Cascade and Cascade Dam — 2187 data points between August 15, 2021 and August 12, 2026 — the level has ranged from a low of 47.1% (September 17, 2021) to a high of 91.7% (June 10, 2024). 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 Idaho basin at 44.525°N, 116.050°W.
Key facts
- Current fill level
- 63.6%
- Water stored
- 544 hm³
- Total capacity
- 855 hm³
- 7-day change
- ▼ 2.5 pts
- Year-on-year
- ▼ 3.0 pts
- Primary use
- Multipurpose
- River basin
- Idaho
- Operator
- BOR
- Coordinates
- 44.525°N, 116.050°W
- Last updated
- August 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Aug 2026 | 63.6% | 544 |
| 11 Aug 2026 | 63.9% | 547 |
| 10 Aug 2026 | 64.4% | 550 |
| 9 Aug 2026 | 64.7% | 553 |
| 8 Aug 2026 | 65.0% | 556 |
| 7 Aug 2026 | 65.4% | 559 |
| 6 Aug 2026 | 65.7% | 562 |
| 5 Aug 2026 | 66.1% | 565 |
| 4 Aug 2026 | 66.4% | 568 |
| 3 Aug 2026 | 66.8% | 571 |
| 2 Aug 2026 | 67.3% | 575 |
| 31 Jul 2026 | 68.0% | 581 |
Frequently asked questions
What is the current water level of Lake Cascade and Cascade Dam?
As of August 12, 2026, Lake Cascade and Cascade Dam is at 63.6% of its capacity, holding approximately 544 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Cascade and Cascade Dam reservoir full?
No. As of August 12, 2026, Lake Cascade and Cascade Dam is within its normal operating range at 63.6% of its capacity, so it is not full.
Is the water level at Lake Cascade and Cascade Dam rising or falling?
The level at Lake Cascade and Cascade Dam is falling — it dropped 2.5 percentage points over the latest week on record.
How much water can Lake Cascade and Cascade Dam hold?
Lake Cascade and Cascade Dam has a total capacity of 855 hm³.
Where is Lake Cascade and Cascade Dam reservoir located?
Lake Cascade and Cascade Dam is located in Idaho, United States, within the Idaho basin (coordinates 44.525°N, 116.050°W).
What is Lake Cascade and Cascade Dam used for?
Lake Cascade and Cascade Dam is used primarily for multiple purposes, and is managed by BOR.