TAP155999
SubstationIndiana · SOUTHERN INDIANA GAS & ELEC CO
At a glance
TAP155999 is an electric transmission substation in Indiana, on SOUTHERN INDIANA GAS & ELEC CO'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
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #156392 | 69 kV | SOUTHERN INDIANA GAS & ELEC CO | IN SERVICE | 0.8 mi |
| #158280 | 69 kV | SOUTHERN INDIANA GAS & ELEC CO | IN SERVICE | 0.3 mi |
| #158281 | 69 kV | SOUTHERN INDIANA GAS & ELEC CO | IN SERVICE | 0.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP155999, 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 |
|---|---|---|---|---|---|---|---|
| BROWN (345 KV) | Substation-Adjacent | IN | Vanderburgh County | 345 kV | 600 MW | 3.0 yrs | 70.8 |
| UNKNOWN123186 | Substation-Adjacent | KY | Henderson County | 345 kV | 600 MW | 4.3 yrs | 66.5 |
| EC Near Northeast (IN) | Greenfield | IN | Vanderburgh | — | — | 3.0 yrs | 64.1 |
| EC Near Northeast (IN) | Greenfield | IN | Vanderburgh | — | — | 3.0 yrs | 64.0 |
| OZ Vanderburgh | Greenfield | IN | Vanderburgh | — | — | 3.0 yrs | 63.7 |
| EC Coal Warrick County | Greenfield | IN | Warrick County | — | — | 3.0 yrs | 63.4 |
| FRANCISCO | Substation-Adjacent | IN | Gibson County | 345 kV | 600 MW | 3.0 yrs | 63.3 |
| UNKNOWN127557 | Substation-Adjacent | IN | Vanderburgh County | 138 kV | 100 MW | 3.0 yrs | 63.2 |
Who owns the transmission lines at TAP155999?
The 3 connected lines listed above are owned by SOUTHERN INDIANA GAS & ELEC CO. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 1.1 miles.
How do candidate sites near TAP155999 score?
The 8 highest-scoring candidate sites within about 25 miles range from 63 to 71 on the 0–100 DC Readiness scale. They fall in Vanderburgh County, Henderson County, Vanderburgh, Warrick County. The Indiana average across 8,629 scored sites is 54. 1,024 of those Indiana sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP155999 substation?
TAP155999 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 TAP155999 is below the national midpoint.
How many transmission lines connect to TAP155999 substation?
3 transmission lines terminate at or pass through TAP155999 in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 1.1 miles.
Who owns TAP155999 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP155999 belong to SOUTHERN INDIANA GAS & ELEC CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP155999 substation located?
TAP155999 is in Indiana at 37.9912, -87.5522. The datacenter candidate sites closest to it are in Vanderburgh County, Henderson County, Vanderburgh.
Are there datacenter candidate sites near TAP155999 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP155999. The highest-scoring is BROWN (345 KV) at 71/100. Across Indiana, the average DC Readiness score is 54.
More in Indiana
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, “TAP155999 substation, Indiana”, https://gridcensus.com/substations/indiana/tap155999-a4977b39 (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 TAP155999 substation, Indiana 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.