Reservoir · Colorado · United States · BOR RISE
Lake Nighthorse and Ridges Basin Dam
93.7% full
Capacity
149.34 hm³
Volume stored
140 hm³
Coordinates
37.224°N, 107.917°W
Last updated
2026-07-28
Current fill
93.7%vs 7 days ago
0.0%stable
vs 1 year ago
-1.2%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: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.224, -107.917 · Open in Google Maps
About Lake Nighthorse and Ridges Basin Dam
As of July 28, 2026, Lake Nighthorse and Ridges Basin Dam is filled to 93.7% of its total capacity, holding roughly 140 hm³ of water out of a maximum 149 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 1.2 points below its level on the same date a year earlier.
Across the readings we hold for Lake Nighthorse and Ridges Basin Dam — 1824 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 92.2% (November 20, 2023) to a high of 95.0% (June 7, 2022). On average the reservoir is fullest around June and at its lowest around February.
It is operated by BOR primarily for multiple purposes. It lies within the Colorado basin at 37.224°N, 107.917°W.
Key facts
- Current fill level
- 93.7%
- Water stored
- 140 hm³
- Total capacity
- 149 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 1.2 pts
- Primary use
- Multipurpose
- River basin
- Colorado
- Operator
- BOR
- Coordinates
- 37.224°N, 107.917°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 93.7% | 140 |
| 27 Jul 2026 | 93.7% | 140 |
| 26 Jul 2026 | 93.7% | 140 |
| 25 Jul 2026 | 93.7% | 140 |
| 24 Jul 2026 | 93.7% | 140 |
| 23 Jul 2026 | 93.7% | 140 |
| 22 Jul 2026 | 93.7% | 140 |
| 21 Jul 2026 | 93.8% | 140 |
| 20 Jul 2026 | 93.8% | 140 |
| 19 Jul 2026 | 93.8% | 140 |
| 18 Jul 2026 | 93.8% | 140 |
| 17 Jul 2026 | 93.8% | 140 |
Frequently asked questions
What is the current water level of Lake Nighthorse and Ridges Basin Dam?
As of July 28, 2026, Lake Nighthorse and Ridges Basin Dam is at 93.7% of its capacity, holding approximately 140 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Nighthorse and Ridges Basin Dam reservoir full?
No. As of July 28, 2026, Lake Nighthorse and Ridges Basin Dam is high at 93.7% of its capacity, so it is not full.
Is the water level at Lake Nighthorse and Ridges Basin Dam rising or falling?
The level at Lake Nighthorse and Ridges Basin Dam has been broadly stable over the latest week on record (0.0 points).
How much water can Lake Nighthorse and Ridges Basin Dam hold?
Lake Nighthorse and Ridges Basin Dam has a total capacity of 149 hm³.
Where is Lake Nighthorse and Ridges Basin Dam reservoir located?
Lake Nighthorse and Ridges Basin Dam is located in Colorado, United States, within the Colorado basin (coordinates 37.224°N, 107.917°W).
What is Lake Nighthorse and Ridges Basin Dam used for?
Lake Nighthorse and Ridges Basin Dam is used primarily for multiple purposes, and is managed by BOR.