Reservoir · Pennsylvania · United States · USACE CWMS
Union City Dam, PA
0.3% full
Capacity
115.95 hm³
Volume stored
0 hm³
Coordinates
41.921°N, 79.901°W
Last updated
2026-07-30
Current fill
0.3%vs 7 days ago
-0.1%losing
vs 1 year ago
+0.1%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. 41.921, -79.901 · Open in Google Maps
About Union City Dam, PA
As of July 30, 2026, Union City Dam, PA is filled to 0.3% of its total capacity, holding roughly 0 hm³ of water out of a maximum 116 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Union City Dam, PA — 324 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 0.1% (October 2, 2021) to a high of 30.5% (February 24, 2022). On average the reservoir is fullest around April and at its lowest around July.
It is operated by USACE primarily for multiple purposes. It lies within the Pennsylvania basin at 41.921°N, 79.901°W.
Key facts
- Current fill level
- 0.3%
- Water stored
- 0 hm³
- Total capacity
- 116 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▲ 0.1 pts
- Primary use
- Multipurpose
- River basin
- Pennsylvania
- Operator
- USACE
- Coordinates
- 41.921°N, 79.901°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 0.3% | 0 |
| 29 Jul 2026 | 0.4% | 0 |
| 28 Jul 2026 | 0.4% | 1 |
| 27 Jul 2026 | 0.1% | 0 |
| 26 Jul 2026 | 0.1% | 0 |
| 25 Jul 2026 | 0.2% | 0 |
| 24 Jul 2026 | 0.3% | 0 |
| 23 Jul 2026 | 0.4% | 0 |
| 22 Jul 2026 | 0.4% | 1 |
| 21 Jul 2026 | 0.2% | 0 |
| 20 Jul 2026 | 0.2% | 0 |
| 19 Jul 2026 | 0.2% | 0 |
Frequently asked questions
What is the current water level of Union City Dam, PA?
As of July 30, 2026, Union City Dam, PA is at 0.3% of its capacity, holding approximately 0 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Union City Dam, PA reservoir full?
No. As of July 30, 2026, Union City Dam, PA is critically low at 0.3% of its capacity, so it is not full.
Is the water level at Union City Dam, PA rising or falling?
The level at Union City Dam, PA has been broadly stable over the latest week on record (-0.1 points).
How much water can Union City Dam, PA hold?
Union City Dam, PA has a total capacity of 116 hm³.
Where is Union City Dam, PA reservoir located?
Union City Dam, PA is located in Pennsylvania, United States, within the Pennsylvania basin (coordinates 41.921°N, 79.901°W).
What is Union City Dam, PA used for?
Union City Dam, PA is used primarily for multiple purposes, and is managed by USACE.