TAP156304
SubstationMaine · EMERA MAINE
At a glance
TAP156304 is an electric transmission substation in Maine, on EMERA MAINE's transmission network. It is classified as distribution (69–115 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 |
|---|---|---|---|---|
| #158340 | 69 kV | EMERA MAINE | IN SERVICE | 5.2 mi |
| #158341 | 69 kV | EMERA MAINE | IN SERVICE | 0.1 mi |
| #158342 | 69 kV | EMERA MAINE | IN SERVICE | 5.8 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP156304, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN133138 | Substation-Adjacent | ME | Aroostook County | 69 kV | 50 MW | 4.3 yrs | 57.4 |
| TAP156308 | Substation-Adjacent | ME | Aroostook County | 69 kV | 50 MW | 4.3 yrs | 57.3 |
| OZ Aroostook | Greenfield | ME | Aroostook | — | — | 4.3 yrs | 56.7 |
| UNKNOWN136597 | Substation-Adjacent | ME | Aroostook County | 69 kV | 50 MW | 4.3 yrs | 56.6 |
| UNKNOWN133126 | Substation-Adjacent | ME | Aroostook County | 69 kV | 50 MW | 4.3 yrs | 56.6 |
| TAP136599 | Substation-Adjacent | ME | Aroostook County | 69 kV | 50 MW | 4.3 yrs | 56.6 |
| UNKNOWN136600 | Substation-Adjacent | ME | Aroostook County | 69 kV | 50 MW | 4.3 yrs | 56.6 |
| TAP156309 | Substation-Adjacent | ME | Aroostook County | 69 kV | 50 MW | 4.3 yrs | 56.6 |
Who owns the transmission lines at TAP156304?
The 3 connected lines listed above are owned by EMERA MAINE. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 11.1 miles.
How do candidate sites near TAP156304 score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 57 on the 0–100 DC Readiness scale. They fall in Aroostook County, Aroostook. The Maine average across 1,183 scored sites is 53.5. 134 of those Maine sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP156304 substation?
TAP156304 has a maximum voltage of 69 kV. That places it in the 69–114 kV band. The median named US substation in this dataset is 115 kV, so TAP156304 is below the national midpoint.
How many transmission lines connect to TAP156304 substation?
3 transmission lines terminate at or pass through TAP156304 in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 11.1 miles.
Who owns TAP156304 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP156304 belong to EMERA MAINE. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP156304 substation located?
TAP156304 is in Maine at 46.6442, -67.9209. The datacenter candidate sites closest to it are in Aroostook County, Aroostook.
Are there datacenter candidate sites near TAP156304 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP156304. The highest-scoring is UNKNOWN133138 at 57/100. Across Maine, the average DC Readiness score is 53.5.
More in Maine
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, “TAP156304 substation, Maine”, https://gridcensus.com/substations/maine/tap156304-40aa2260 (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 TAP156304 substation, Maine 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.