Reservoir · Pennsylvania · United States · USACE CWMS
Youghiogheny River Lake
100.9% full
Capacity
184.16 hm³
Volume stored
186 hm³
Coordinates
39.798°N, 79.366°W
Last updated
2026-10-09
Current fill
100.9%vs 7 days ago
-2.4%losing
vs 1 year ago
N/A7-day trend
↓falling
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: 2026-10-09.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.798, -79.366 · Open in Google Maps
About Youghiogheny River Lake
As of October 9, 2026, Youghiogheny River Lake is filled to 100.9% of its total capacity, holding roughly 186 hm³ of water out of a maximum 184 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has fallen by 2.4 percentage points.
Across the readings we hold for Youghiogheny River Lake — 327 data points between October 10, 2021 and October 9, 2026 — the level has ranged from a low of 36.5% (December 18, 2021) to a high of 105.0% (April 7, 2022). On average the reservoir is fullest around May and at its lowest around December.
It is operated by USACE primarily for multiple purposes. It lies within the Pennsylvania basin at 39.798°N, 79.366°W.
Key facts
- Current fill level
- 100.9%
- Water stored
- 186 hm³
- Total capacity
- 184 hm³
- 7-day change
- ▼ 2.4 pts
- Primary use
- Multipurpose
- River basin
- Pennsylvania
- Operator
- USACE
- Coordinates
- 39.798°N, 79.366°W
- Last updated
- October 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Oct 2026 | 100.9% | 186 |
| 8 Oct 2026 | 101.0% | 186 |
| 7 Oct 2026 | 101.4% | 187 |
| 6 Oct 2026 | 101.8% | 188 |
| 5 Oct 2026 | 102.3% | 188 |
| 4 Oct 2026 | 102.5% | 189 |
| 3 Oct 2026 | 103.0% | 190 |
| 2 Oct 2026 | 103.3% | 190 |
| 1 Oct 2026 | 103.9% | 191 |
| 30 Sep 2026 | 104.7% | 193 |
| 29 Sep 2026 | 105.0% | 195 |
| 28 Sep 2026 | 105.0% | 196 |