Reservoir · Nebraska · United States · USACE CWMS
Harlan County Dam & Reservoir
66.7% full
Capacity
404.09 hm³
Volume stored
269 hm³
Coordinates
40.070°N, 99.212°W
Last updated
2026-06-11
Current fill
66.7%vs 7 days ago
+0.1%gaining
vs 1 year ago
+1.8%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: 2026-06-11.
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 June 11, 2026, Harlan County Dam & Reservoir is filled to 66.7% of its total capacity, holding roughly 269 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 (+0.1 pts), and it is 1.8 points above its level on the same date a year earlier.
Across the readings we hold for Harlan County Dam & Reservoir — 277 data points between June 15, 2023 and June 11, 2026 — the level has ranged from a low of 64.1% (September 19, 2023) to a high of 78.2% (June 17, 2023). On average the reservoir is fullest around July and at its lowest around November.
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
- 66.7%
- Water stored
- 269 hm³
- Total capacity
- 404 hm³
- 7-day change
- ▲ 0.1 pts
- Year-on-year
- ▲ 1.8 pts
- Primary use
- Multipurpose
- River basin
- Nebraska
- Operator
- USACE
- Coordinates
- 40.070°N, 99.212°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 66.7% | 269 |
| 10 Jun 2026 | 66.6% | 269 |
| 9 Jun 2026 | 66.4% | 268 |
| 8 Jun 2026 | 65.8% | 266 |
| 7 Jun 2026 | 65.8% | 266 |
| 6 Jun 2026 | 65.8% | 266 |
| 5 Jun 2026 | 65.8% | 266 |
| 4 Jun 2026 | 65.9% | 266 |
| 3 Jun 2026 | 65.6% | 265 |
| 2 Jun 2026 | 65.7% | 266 |
| 1 Jun 2026 | 65.7% | 266 |
| 31 May 2026 | 65.8% | 266 |
Frequently asked questions
What is the current water level of Harlan County Dam & Reservoir?
As of June 11, 2026, Harlan County Dam & Reservoir is at 66.7% of its capacity, holding approximately 269 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Harlan County Dam & Reservoir reservoir full?
No. As of June 11, 2026, Harlan County Dam & Reservoir is within its normal operating range at 66.7% 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 (+0.1 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.