Reservoir · Nebraska · United States · USACE CWMS
Harlan County Dam & Reservoir
57.8% full
Capacity
404.09 hm³
Volume stored
234 hm³
Coordinates
40.070°N, 99.212°W
Last updated
2026-07-30
Current fill
57.8%vs 7 days ago
0.0%stable
vs 1 year ago
-8.0%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — 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: 2026-07-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.070, -99.212 · Open in Google Maps
About Harlan County Dam & Reservoir
As of July 30, 2026, Harlan County Dam & Reservoir is filled to 57.8% of its total capacity, holding roughly 234 hm³ of water out of a maximum 404 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 8.0 points below its level on the same date a year earlier.
Across the readings we hold for Harlan County Dam & Reservoir — 328 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 57.7% (July 28, 2026) to a high of 89.6% (July 31, 2021). On average the reservoir is fullest around February and at its lowest around July.
It is operated by USACE primarily for multiple purposes. It lies within the Nebraska basin at 40.070°N, 99.212°W.
Key facts
- Current fill level
- 57.8%
- Water stored
- 234 hm³
- Total capacity
- 404 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 8.0 pts
- Primary use
- Multipurpose
- River basin
- Nebraska
- Operator
- USACE
- Coordinates
- 40.070°N, 99.212°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 57.8% | 234 |
| 29 Jul 2026 | 57.8% | 234 |
| 28 Jul 2026 | 57.7% | 233 |
| 27 Jul 2026 | 58.0% | 234 |
| 26 Jul 2026 | 58.2% | 235 |
| 25 Jul 2026 | 58.3% | 236 |
| 24 Jul 2026 | 58.5% | 236 |
| 23 Jul 2026 | 58.6% | 237 |
| 22 Jul 2026 | 58.7% | 237 |
| 21 Jul 2026 | 59.2% | 239 |
| 20 Jul 2026 | 59.7% | 241 |
| 19 Jul 2026 | 60.1% | 243 |
Frequently asked questions
What is the current water level of Harlan County Dam & Reservoir?
As of July 30, 2026, Harlan County Dam & Reservoir is at 57.8% of its capacity, holding approximately 234 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Harlan County Dam & Reservoir reservoir full?
No. As of July 30, 2026, Harlan County Dam & Reservoir is within its normal operating range at 57.8% of its capacity, so it is not full.
Is the water level at Harlan County Dam & Reservoir rising or falling?
The level at Harlan County Dam & Reservoir has been broadly stable over the latest week on record (0.0 points).
How much water can Harlan County Dam & Reservoir hold?
Harlan County Dam & Reservoir has a total capacity of 404 hm³.
Where is Harlan County Dam & Reservoir reservoir located?
Harlan County Dam & Reservoir is located in Nebraska, United States, within the Nebraska basin (coordinates 40.070°N, 99.212°W).
What is Harlan County Dam & Reservoir used for?
Harlan County Dam & Reservoir is used primarily for multiple purposes, and is managed by USACE.