Reservoir · Idaho · United States · BOR RISE
Lake Cascade and Cascade Dam (CSC)
87.3% full
Capacity
855.05 hm³
Volume stored
747 hm³
Coordinates
44.525°N, 116.050°W
Last updated
2026-06-11
Current fill
87.3%vs 7 days ago
-0.4%losing
vs 1 year ago
-2.9%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: 2026-06-11.
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 (CSC)
As of June 11, 2026, Lake Cascade and Cascade Dam (CSC) is filled to 87.3% of its total capacity, holding roughly 747 hm³ of water out of a maximum 855 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.4 pts), and it is 2.9 points below its level on the same date a year earlier.
Across the readings we hold for Lake Cascade and Cascade Dam (CSC) — 2192 data points between June 13, 2021 and June 11, 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
- 87.3%
- Water stored
- 747 hm³
- Total capacity
- 855 hm³
- 7-day change
- ▼ 0.4 pts
- Year-on-year
- ▼ 2.9 pts
- Primary use
- Multipurpose
- River basin
- Idaho
- Operator
- BOR
- Coordinates
- 44.525°N, 116.050°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 87.3% | 747 |
| 10 Jun 2026 | 87.7% | 750 |
| 9 Jun 2026 | 88.1% | 753 |
| 8 Jun 2026 | 88.4% | 756 |
| 7 Jun 2026 | 88.8% | 759 |
| 6 Jun 2026 | 89.3% | 764 |
| 5 Jun 2026 | 89.6% | 766 |
| 4 Jun 2026 | 90.0% | 769 |
| 3 Jun 2026 | 90.2% | 772 |
| 2 Jun 2026 | 90.6% | 775 |
| 1 Jun 2026 | 90.8% | 777 |
| 31 May 2026 | 90.9% | 777 |
Frequently asked questions
What is the current water level of Lake Cascade and Cascade Dam (CSC)?
As of June 11, 2026, Lake Cascade and Cascade Dam (CSC) is at 87.3% of its capacity, holding approximately 747 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Cascade and Cascade Dam (CSC) reservoir full?
No. As of June 11, 2026, Lake Cascade and Cascade Dam (CSC) is high at 87.3% of its capacity, so it is not full.
Is the water level at Lake Cascade and Cascade Dam (CSC) rising or falling?
The level at Lake Cascade and Cascade Dam (CSC) has been broadly stable over the latest week on record (-0.4 points).
How much water can Lake Cascade and Cascade Dam (CSC) hold?
Lake Cascade and Cascade Dam (CSC) has a total capacity of 855 hm³.
Where is Lake Cascade and Cascade Dam (CSC) reservoir located?
Lake Cascade and Cascade Dam (CSC) is located in Idaho, United States, within the Idaho basin (coordinates 44.525°N, 116.050°W).
What is Lake Cascade and Cascade Dam (CSC) used for?
Lake Cascade and Cascade Dam (CSC) is used primarily for multiple purposes, and is managed by BOR.