Reservoir · Nebraska · United States · USACE CWMS
Harlan County Dam & Reservoir
51.0% full
Capacity
404.09 hm³
Volume stored
206 hm³
Vs month average
96% of normal
Coordinates
40.070°N, 99.212°W
Last updated
2026-10-29
Current fill
51.0%vs 7 days ago
+0.1 ppgaining
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
96%of normal
51.0% full on 2026-10-29, against an average of 53.1% for October across 2 years of readings (-2.1 points).
Drought Monitor at this site · 27 October 2026
Nonenot in a drought category
Harlan County Dam & Reservoir's coordinates fall outside every category on the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Nebraska drought figures →
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: 2026-10-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.070°N, 99.212°W · Open in Google Maps
About Harlan County Dam & Reservoir
As of October 29, 2026, Harlan County Dam & Reservoir is filled to 51.0% of its total capacity, holding 206.28 hm³ of water out of a maximum 404.09 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 pp).
Across the readings we hold for Harlan County Dam & Reservoir — 330 data points between October 30, 2021 and October 29, 2026 — the level has ranged from a low of 48.9% (September 22, 2026) to a high of 96.1% (May 25, 2022). On average the reservoir is fullest around May and at its lowest around September.
It is operated by USACE primarily for multiple purposes. It is at 40.070°N, 99.212°W.
Key facts
- Current fill level
- 51.0% of total capacity
- Water stored
- 206.28 hm³
- Total capacity
- 404.09 hm³
- 7-day change
- ▲ 0.1 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 40.070°N, 99.212°W
- Last updated
- October 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Oct 2026 | 51.0% | 206.28 |
| 28 Oct 2026 | 51.1% | 206.5 |
| 27 Oct 2026 | 51.0% | 206.28 |
| 26 Oct 2026 | 51.2% | 206.85 |
| 25 Oct 2026 | 51.0% | 206.05 |
| 24 Oct 2026 | 50.9% | 205.82 |
| 23 Oct 2026 | 50.9% | 205.7 |
| 22 Oct 2026 | 50.9% | 205.59 |
| 21 Oct 2026 | 50.9% | 205.7 |
| 20 Oct 2026 | 50.9% | 205.59 |
| 19 Oct 2026 | 50.9% | 205.59 |
| 18 Oct 2026 | 50.9% | 205.59 |