Reservoir · Nebraska · United States · BOR RISE
Swanson Lake and Trenton Dam
46.3% full
Capacity
138.41 hm³
Volume stored
64 hm³
Coordinates
40.170°N, 101.060°W
Last updated
2026-07-28
Current fill
46.3%vs 7 days ago
0.0%stable
vs 1 year ago
-4.8%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. 40.170, -101.060 · Open in Google Maps
About Swanson Lake and Trenton Dam
As of July 28, 2026, Swanson Lake and Trenton Dam is filled to 46.3% of its total capacity, holding roughly 64 hm³ of water out of a maximum 138 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 4.8 points below its level on the same date a year earlier.
Across the readings we hold for Swanson Lake and Trenton Dam — 1823 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 21.7% (December 8, 2022) to a high of 63.2% (June 8, 2024). On average the reservoir is fullest around June and at its lowest around November.
It is operated by BOR primarily for multiple purposes. It lies within the Nebraska basin at 40.170°N, 101.060°W.
Key facts
- Current fill level
- 46.3%
- Water stored
- 64 hm³
- Total capacity
- 138 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 4.8 pts
- Primary use
- Multipurpose
- River basin
- Nebraska
- Operator
- BOR
- Coordinates
- 40.170°N, 101.060°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 46.3% | 64 |
| 27 Jul 2026 | 46.3% | 64 |
| 26 Jul 2026 | 46.6% | 64 |
| 25 Jul 2026 | 46.9% | 65 |
| 24 Jul 2026 | 47.1% | 65 |
| 23 Jul 2026 | 47.4% | 66 |
| 22 Jul 2026 | 47.7% | 66 |
| 21 Jul 2026 | 48.1% | 67 |
| 20 Jul 2026 | 48.4% | 67 |
| 19 Jul 2026 | 48.6% | 67 |
| 18 Jul 2026 | 48.9% | 68 |
| 17 Jul 2026 | 49.2% | 68 |
Frequently asked questions
What is the current water level of Swanson Lake and Trenton Dam?
As of July 28, 2026, Swanson Lake and Trenton Dam is at 46.3% of its capacity, holding approximately 64 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Swanson Lake and Trenton Dam reservoir full?
No. As of July 28, 2026, Swanson Lake and Trenton Dam is within its normal operating range at 46.3% of its capacity, so it is not full.
Is the water level at Swanson Lake and Trenton Dam rising or falling?
The level at Swanson Lake and Trenton Dam has been broadly stable over the latest week on record (0.0 points).
How much water can Swanson Lake and Trenton Dam hold?
Swanson Lake and Trenton Dam has a total capacity of 138 hm³.
Where is Swanson Lake and Trenton Dam reservoir located?
Swanson Lake and Trenton Dam is located in Nebraska, United States, within the Nebraska basin (coordinates 40.170°N, 101.060°W).
What is Swanson Lake and Trenton Dam used for?
Swanson Lake and Trenton Dam is used primarily for multiple purposes, and is managed by BOR.