TAP156323
SubstationNorth Dakota · OTTER TAIL POWER CO
At a glance
TAP156323 is an electric transmission substation in North Dakota, on OTTER TAIL POWER CO's transmission network. It is classified as sub-transmission (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 |
|---|---|---|---|---|
| #155923 | 115 kV | OTTER TAIL POWER CO | IN SERVICE | 3.2 mi |
| #157352 | 115 kV | OTTER TAIL POWER CO | IN SERVICE | 0.0 mi |
| #158196 | 115 kV | OTTER TAIL POWER CO | IN SERVICE | 2.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP156323, 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 |
|---|---|---|---|---|---|---|---|
| HESKETT 230 KV | Substation-Adjacent | ND | Burleigh County | 230 kV | 300 MW | 4.3 yrs | 66.5 |
| UNKNOWN132925 | Substation-Adjacent | ND | Burleigh County | 230 kV | 300 MW | 4.3 yrs | 66.5 |
| BISMARCK | Substation-Adjacent | ND | Burleigh County | 230 kV | 300 MW | 4.3 yrs | 65.9 |
| MANDAN JUNCTION | Substation-Adjacent | ND | Burleigh County | 230 kV | 300 MW | 4.3 yrs | 65.7 |
| EC Near R M Heskett | Greenfield | ND | Morton | — | — | 4.3 yrs | 64.4 |
| EC Coal Morton County | Greenfield | ND | Morton County | — | — | 4.3 yrs | 64.2 |
| EC Near R M Heskett | Greenfield | ND | Morton | — | — | 4.3 yrs | 63.8 |
| EC Coal Burleigh County | Greenfield | ND | Burleigh County | — | — | 4.3 yrs | 63.6 |
Who owns the transmission lines at TAP156323?
The 3 connected lines listed above are owned by OTTER TAIL POWER CO. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 5.5 miles.
How do candidate sites near TAP156323 score?
The 8 highest-scoring candidate sites within about 25 miles range from 64 to 67 on the 0–100 DC Readiness scale. They fall in Burleigh County, Morton, Morton County. The North Dakota average across 1,020 scored sites is 55.7. 453 of those North Dakota sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP156323 substation?
TAP156323 has a maximum voltage of 115 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP156323 is at the national midpoint.
How many transmission lines connect to TAP156323 substation?
3 transmission lines terminate at or pass through TAP156323 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 5.5 miles.
Who owns TAP156323 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP156323 belong to OTTER TAIL POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP156323 substation located?
TAP156323 is in North Dakota at 46.8813, -100.7401. The datacenter candidate sites closest to it are in Burleigh County, Morton, Morton County.
Are there datacenter candidate sites near TAP156323 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP156323. The highest-scoring is HESKETT 230 KV at 67/100. Across North Dakota, the average DC Readiness score is 55.7.
More in North Dakota
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, “TAP156323 substation, North Dakota”, https://gridcensus.com/substations/north-dakota/tap156323-c2d539d2 (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 TAP156323 substation, North Dakota 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.