Reservoir · Pennsylvania · United States · USACE CWMS
Mahoning Creek Lake
33.5% full
Capacity
37.46 hm³
Volume stored
13 hm³
Coordinates
40.922°N, 79.278°W
Last updated
2026-09-11
Current fill
33.5%vs 7 days ago
-6.4%losing
vs 1 year ago
N/A7-day trend
↓falling
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-09-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.922, -79.278 · Open in Google Maps
About Mahoning Creek Lake
As of September 11, 2026, Mahoning Creek Lake is filled to 33.5% of its total capacity, holding roughly 13 hm³ of water out of a maximum 37 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 6.4 percentage points.
Across the readings we hold for Mahoning Creek Lake — 327 data points between September 12, 2021 and September 11, 2026 — the level has ranged from a low of 15.4% (December 16, 2021) to a high of 100.0% (February 26, 2022). On average the reservoir is fullest around February and at its lowest around April.
It is operated by USACE primarily for multiple purposes. It lies within the Pennsylvania basin at 40.922°N, 79.278°W.
Key facts
- Current fill level
- 33.5%
- Water stored
- 13 hm³
- Total capacity
- 37 hm³
- 7-day change
- ▼ 6.4 pts
- Primary use
- Multipurpose
- River basin
- Pennsylvania
- Operator
- USACE
- Coordinates
- 40.922°N, 79.278°W
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 33.5% | 13 |
| 10 Sep 2026 | 33.5% | 13 |
| 9 Sep 2026 | 33.9% | 13 |
| 8 Sep 2026 | 34.4% | 13 |
| 7 Sep 2026 | 35.2% | 13 |
| 6 Sep 2026 | 38.0% | 14 |
| 5 Sep 2026 | 41.5% | 16 |
| 4 Sep 2026 | 39.9% | 15 |
| 3 Sep 2026 | 33.4% | 12 |
| 2 Sep 2026 | 32.1% | 12 |
| 1 Sep 2026 | 32.0% | 12 |
| 31 Aug 2026 | 31.8% | 12 |