Reservoir · Pennsylvania · United States · USACE CWMS
Loyalhanna Lake, PA
16.5% full
Capacity
29.95 hm³
Volume stored
5 hm³
Coordinates
40.457°N, 79.451°W
Last updated
2026-06-12
Current fill
16.5%vs 7 days ago
0.0%stable
vs 1 year ago
-4.0%year-over-year
7-day trend
→stable
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: 2026-06-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.457, -79.451 · Open in Google Maps
About Loyalhanna Lake, PA
As of June 12, 2026, Loyalhanna Lake, PA is filled to 16.5% of its total capacity, holding roughly 5 hm³ of water out of a maximum 30 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 4.0 points below its level on the same date a year earlier.
Across the readings we hold for Loyalhanna Lake, PA — 325 data points between June 13, 2021 and June 12, 2026 — the level has ranged from a low of 6.8% (December 18, 2021) to a high of 100.0% (March 29, 2026). On average the reservoir is fullest around March and at its lowest around November.
It is operated by USACE primarily for multiple purposes. It lies within the Pennsylvania basin at 40.457°N, 79.451°W.
Key facts
- Current fill level
- 16.5%
- Water stored
- 5 hm³
- Total capacity
- 30 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 4.0 pts
- Primary use
- Multipurpose
- River basin
- Pennsylvania
- Operator
- USACE
- Coordinates
- 40.457°N, 79.451°W
- Last updated
- June 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Jun 2026 | 16.5% | 5 |
| 11 Jun 2026 | 16.5% | 5 |
| 10 Jun 2026 | 16.7% | 5 |
| 9 Jun 2026 | 17.0% | 5 |
| 8 Jun 2026 | 17.4% | 5 |
| 7 Jun 2026 | 15.9% | 5 |
| 6 Jun 2026 | 13.4% | 4 |
| 5 Jun 2026 | 13.4% | 4 |
| 4 Jun 2026 | 13.8% | 4 |
| 3 Jun 2026 | 13.9% | 4 |
| 2 Jun 2026 | 13.8% | 4 |
| 1 Jun 2026 | 14.3% | 4 |
Frequently asked questions
What is the current water level of Loyalhanna Lake, PA?
As of June 12, 2026, Loyalhanna Lake, PA is at 16.5% of its capacity, holding approximately 5 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Loyalhanna Lake, PA reservoir full?
No. As of June 12, 2026, Loyalhanna Lake, PA is critically low at 16.5% of its capacity, so it is not full.
Is the water level at Loyalhanna Lake, PA rising or falling?
The level at Loyalhanna Lake, PA has been broadly stable over the latest week on record (0.0 points).
How much water can Loyalhanna Lake, PA hold?
Loyalhanna Lake, PA has a total capacity of 30 hm³.
Where is Loyalhanna Lake, PA reservoir located?
Loyalhanna Lake, PA is located in Pennsylvania, United States, within the Pennsylvania basin (coordinates 40.457°N, 79.451°W).
What is Loyalhanna Lake, PA used for?
Loyalhanna Lake, PA is used primarily for multiple purposes, and is managed by USACE.