Reservoir · Pennsylvania · United States · USACE CWMS
Union City Dam
0.1% full
Capacity
115.95 hm³
Volume stored
0 hm³
Vs month average
9% of normal
Coordinates
41.921°N, 79.901°W
Last updated
2026-10-28
Current fill
0.1%vs 7 days ago
-0.3 pplosing
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
9%of normal
0.1% full on 2026-10-28, against an average of 1.1% for October across 2 years of readings (-1.0 points).
Drought Monitor at this site · 20 October 2026
D0abnormally dry
The ground at Union City Dam's coordinates falls inside the D0 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Pennsylvania drought figures →
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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.921°N, 79.901°W · Open in Google Maps
About Union City Dam
As of October 28, 2026, Union City Dam is filled to 0.1% of its total capacity, holding 0.16 hm³ of water out of a maximum 115.95 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (-0.3 pp).
Across the readings we hold for Union City Dam — 326 data points between October 29, 2021 and October 28, 2026 — the level has ranged from a low of 0.1% (July 1, 2026) to a high of 30.7% (February 24, 2022). On average the reservoir is fullest around February and at its lowest around July.
It is operated by USACE primarily for multiple purposes. It is at 41.921°N, 79.901°W.
Key facts
- Current fill level
- 0.1% of total capacity
- Water stored
- 0.16 hm³
- Total capacity
- 115.95 hm³
- 7-day change
- ▼ 0.3 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 41.921°N, 79.901°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 0.1% | 0.16 |
| 27 Oct 2026 | 0.1% | 0.16 |
| 26 Oct 2026 | 0.1% | 0.17 |
| 25 Oct 2026 | 0.2% | 0.21 |
| 24 Oct 2026 | 0.2% | 0.24 |
| 23 Oct 2026 | 0.3% | 0.31 |
| 22 Oct 2026 | 0.3% | 0.38 |
| 21 Oct 2026 | 0.4% | 0.47 |
| 20 Oct 2026 | 0.5% | 0.59 |
| 19 Oct 2026 | 0.6% | 0.7 |
| 18 Oct 2026 | 0.7% | 0.78 |
| 17 Oct 2026 | 0.6% | 0.68 |