TAP134503
SubstationMinnesota · OTTER TAIL POWER CO
At a glance
TAP134503 is an electric transmission substation in Minnesota, operated by OTTER TAIL POWER CO. 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 |
|---|---|---|---|---|
| #115836 | 115 kV | OTTER TAIL POWER CO | IN SERVICE | 0.0 mi |
| #134351 | 115 kV | OTTER TAIL POWER CO | IN SERVICE | 28.3 mi |
| #135304 | 115 kV | OTTER TAIL POWER CO | IN SERVICE | 8.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP134503, 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 |
|---|---|---|---|---|---|---|---|
| TAP133980 | Substation-Adjacent | MN | Marshall County | 115 kV | 100 MW | 4.3 yrs | 60.4 |
| UNKNOWN130129 | Substation-Adjacent | MN | Marshall County | 115 kV | 100 MW | 4.3 yrs | 58.6 |
| UNKNOWN130136 | Substation-Adjacent | MN | Marshall County | 115 kV | 100 MW | 4.3 yrs | 58.6 |
| UNKNOWN130311 | Substation-Adjacent | MN | Kittson County | 115 kV | 100 MW | 4.3 yrs | 58.1 |
| Former Warren Power Plant | Industrial | MN | Marshall County | — | — | 4.3 yrs | 54.5 |
| Mine Site | Former Mine | MN | Kittson County | — | — | 4.3 yrs | 52.7 |
| Mine Site | Former Mine | MN | Marshall County | — | — | 4.3 yrs | 52.6 |
| Mine Site | Former Mine | MN | Marshall County | — | — | 4.3 yrs | 52.6 |
Who owns the transmission lines at TAP134503?
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 36.5 miles.
How do candidate sites near TAP134503 score?
The 8 highest-scoring candidate sites within about 25 miles range from 53 to 60 on the 0–100 DC Readiness scale. They fall in Marshall County, Kittson County. The Minnesota average across 3,216 scored sites is 55.7. 1,270 of those Minnesota sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP134503 substation?
TAP134503 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 TAP134503 is at the national midpoint.
How many transmission lines connect to TAP134503 substation?
3 transmission lines terminate at or pass through TAP134503 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 36.5 miles.
Who owns TAP134503 substation?
HIFLD lists OTTER TAIL POWER CO as the operator of TAP134503.
Where is TAP134503 substation located?
TAP134503 is in Minnesota at 48.5872, -96.5174. The datacenter candidate sites closest to it are in Marshall County, Kittson County.
Are there datacenter candidate sites near TAP134503 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP134503. The highest-scoring is TAP133980 at 60/100. Across Minnesota, the average DC Readiness score is 55.7.
More in Minnesota
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, “TAP134503 substation, Minnesota”, https://gridcensus.com/substations/minnesota/tap134503-5540893f (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 TAP134503 substation, Minnesota 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.