Reservoir · Colorado · United States · BOR RISE
Green Mountain Reservoir Dam and Powerplant
44.9% full
Capacity
189.51 hm³
Volume stored
85 hm³
Coordinates
39.879°N, 106.313°W
Last updated
2026-07-28
Current fill
44.9%vs 7 days ago
+22.7%gaining
vs 1 year ago
+7.1%year-over-year
7-day trend
↑rising
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: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.879, -106.313 · Open in Google Maps
About Green Mountain Reservoir Dam and Powerplant
As of July 28, 2026, Green Mountain Reservoir Dam and Powerplant is filled to 44.9% of its total capacity, holding roughly 85 hm³ of water out of a maximum 190 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 22.7 percentage points, and it is 7.1 points above its level on the same date a year earlier.
Across the readings we hold for Green Mountain Reservoir Dam and Powerplant — 1823 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 22.2% (July 23, 2026) to a high of 99.4% (July 21, 2023). On average the reservoir is fullest around August and at its lowest around April.
It is operated by BOR primarily for multiple purposes. It lies within the Colorado basin at 39.879°N, 106.313°W.
Key facts
- Current fill level
- 44.9%
- Water stored
- 85 hm³
- Total capacity
- 190 hm³
- 7-day change
- ▲ 22.7 pts
- Year-on-year
- ▲ 7.1 pts
- Primary use
- Multipurpose
- River basin
- Colorado
- Operator
- BOR
- Coordinates
- 39.879°N, 106.313°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 44.9% | 85 |
| 27 Jul 2026 | 22.2% | 42 |
| 26 Jul 2026 | 22.2% | 42 |
| 25 Jul 2026 | 22.2% | 42 |
| 24 Jul 2026 | 22.2% | 42 |
| 23 Jul 2026 | 22.2% | 42 |
| 22 Jul 2026 | 22.4% | 42 |
| 21 Jul 2026 | 22.6% | 43 |
| 20 Jul 2026 | 22.8% | 43 |
| 19 Jul 2026 | 23.0% | 44 |
| 18 Jul 2026 | 23.2% | 44 |
| 17 Jul 2026 | 23.4% | 44 |
Frequently asked questions
What is the current water level of Green Mountain Reservoir Dam and Powerplant?
As of July 28, 2026, Green Mountain Reservoir Dam and Powerplant is at 44.9% of its capacity, holding approximately 85 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Green Mountain Reservoir Dam and Powerplant reservoir full?
No. As of July 28, 2026, Green Mountain Reservoir Dam and Powerplant is within its normal operating range at 44.9% of its capacity, so it is not full.
Is the water level at Green Mountain Reservoir Dam and Powerplant rising or falling?
The level at Green Mountain Reservoir Dam and Powerplant is rising — it gained 22.7 percentage points over the latest week on record.
How much water can Green Mountain Reservoir Dam and Powerplant hold?
Green Mountain Reservoir Dam and Powerplant has a total capacity of 190 hm³.
Where is Green Mountain Reservoir Dam and Powerplant reservoir located?
Green Mountain Reservoir Dam and Powerplant is located in Colorado, United States, within the Colorado basin (coordinates 39.879°N, 106.313°W).
What is Green Mountain Reservoir Dam and Powerplant used for?
Green Mountain Reservoir Dam and Powerplant is used primarily for multiple purposes, and is managed by BOR.