Reservoir · Pennsylvania · United States · USACE CWMS
East Branch Clarion Lake, PA
84.2% full
Capacity
80.55 hm³
Volume stored
68 hm³
Coordinates
41.561°N, 78.595°W
Last updated
2026-07-30
Current fill
84.2%vs 7 days ago
-0.1%losing
vs 1 year ago
-16.3%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: 2026-07-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.561, -78.595 · Open in Google Maps
About East Branch Clarion Lake, PA
As of July 30, 2026, East Branch Clarion Lake, PA is filled to 84.2% of its total capacity, holding roughly 68 hm³ of water out of a maximum 81 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it is 16.3 points below its level on the same date a year earlier.
Across the readings we hold for East Branch Clarion Lake, PA — 327 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 68.2% (October 23, 2021) to a high of 104.8% (May 12, 2026). On average the reservoir is fullest around May and at its lowest around October.
It is operated by USACE primarily for multiple purposes. It lies within the Pennsylvania basin at 41.561°N, 78.595°W.
Key facts
- Current fill level
- 84.2%
- Water stored
- 68 hm³
- Total capacity
- 81 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▼ 16.3 pts
- Primary use
- Multipurpose
- River basin
- Pennsylvania
- Operator
- USACE
- Coordinates
- 41.561°N, 78.595°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 84.2% | 68 |
| 29 Jul 2026 | 84.3% | 68 |
| 28 Jul 2026 | 84.4% | 68 |
| 27 Jul 2026 | 84.5% | 68 |
| 26 Jul 2026 | 85.0% | 68 |
| 25 Jul 2026 | 85.5% | 69 |
| 24 Jul 2026 | 86.0% | 69 |
| 23 Jul 2026 | 86.5% | 70 |
| 22 Jul 2026 | 87.0% | 70 |
| 21 Jul 2026 | 87.4% | 70 |
| 20 Jul 2026 | 87.7% | 71 |
| 19 Jul 2026 | 88.2% | 71 |
Frequently asked questions
What is the current water level of East Branch Clarion Lake, PA?
As of July 30, 2026, East Branch Clarion Lake, PA is at 84.2% of its capacity, holding approximately 68 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is East Branch Clarion Lake, PA reservoir full?
No. As of July 30, 2026, East Branch Clarion Lake, PA is high at 84.2% of its capacity, so it is not full.
Is the water level at East Branch Clarion Lake, PA rising or falling?
The level at East Branch Clarion Lake, PA has been broadly stable over the latest week on record (-0.1 points).
How much water can East Branch Clarion Lake, PA hold?
East Branch Clarion Lake, PA has a total capacity of 81 hm³.
Where is East Branch Clarion Lake, PA reservoir located?
East Branch Clarion Lake, PA is located in Pennsylvania, United States, within the Pennsylvania basin (coordinates 41.561°N, 78.595°W).
What is East Branch Clarion Lake, PA used for?
East Branch Clarion Lake, PA is used primarily for multiple purposes, and is managed by USACE.