TAP146394
SubstationPennsylvania · DUQUESNE LIGHT CO
At a glance
TAP146394 is an electric transmission substation in Pennsylvania, on DUQUESNE LIGHT CO's transmission network. It is classified as sub-transmission (138 kv) and connects 3 transmission lines. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #117047 | 138 kV | DUQUESNE LIGHT CO | IN SERVICE | 3.1 mi |
| #130052 | 138 kV | DUQUESNE LIGHT CO | IN SERVICE | 0.8 mi |
| #144270 | 138 kV | — | IN SERVICE | 7.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP146394, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| BRUNOT ISLAND | Substation-Adjacent | PA | Allegheny County | 345 kV | 600 MW | 3.6 yrs | 68.8 |
| Hazelwood Green’s Mill 19 Solar | Brownfield | PA | Allegheny | — | 2 MW | 3.6 yrs | 67.9 |
| CABOT | Substation-Adjacent | PA | Butler County | 500 kV | 1,000 MW | 3.6 yrs | 67.4 |
| TAP151899 | Substation-Adjacent | PA | Allegheny County | 345 kV | 600 MW | 3.6 yrs | 66.2 |
| CRANBERRY | Substation-Adjacent | PA | Beaver County | 500 kV | 1,000 MW | 3.6 yrs | 65.8 |
| EC Coal Allegheny County | Greenfield | PA | Allegheny County | — | — | 3.6 yrs | 65.0 |
| EC Coal Allegheny County | Greenfield | PA | Allegheny County | — | — | 3.6 yrs | 64.6 |
| EC Near Brunot Island | Greenfield | PA | Allegheny | — | — | 3.6 yrs | 64.4 |
Who owns the transmission lines at TAP146394?
The 3 connected lines listed above are owned by DUQUESNE LIGHT CO. Line voltages range from 138 kV to 138 kV. Their combined recorded length is about 10.8 miles.
How do candidate sites near TAP146394 score?
The 8 highest-scoring candidate sites within about 25 miles range from 64 to 69 on the 0–100 DC Readiness scale. They fall in Allegheny County, Allegheny, Butler County, Beaver County. The Pennsylvania average across 6,497 scored sites is 51.8. 886 of those Pennsylvania sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP146394 substation?
TAP146394 has a maximum voltage of 138 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP146394 is above the national midpoint.
How many transmission lines connect to TAP146394 substation?
3 transmission lines terminate at or pass through TAP146394 in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 10.8 miles.
Who owns TAP146394 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP146394 belong to DUQUESNE LIGHT CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP146394 substation located?
TAP146394 is in Pennsylvania at 40.4423, -79.7944. The datacenter candidate sites closest to it are in Allegheny County, Allegheny, Butler County.
Are there datacenter candidate sites near TAP146394 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP146394. The highest-scoring is BRUNOT ISLAND at 69/100. Across Pennsylvania, the average DC Readiness score is 51.8.
More in Pennsylvania
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “TAP146394 substation, Pennsylvania”, https://gridcensus.com/substations/pennsylvania/tap146394-c36dc245 (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
Every site and score for TAP146394 substation, Pennsylvania is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.