TAP159178
SubstationIowa
At a glance
TAP159178 is an electric transmission substation in Iowa. 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 |
|---|---|---|---|---|
| #159758 | 69 kV | — | IN SERVICE | 6.0 mi |
| #159759 | 69 kV | — | IN SERVICE | 0.0 mi |
| #159760 | 69 kV | — | IN SERVICE | 7.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP159178, 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 |
|---|---|---|---|---|---|---|---|
| SIOUX CITY | Substation-Adjacent | IA | Plymouth County | 345 kV | 600 MW | 4.3 yrs | 68.1 |
| PLYMOUTH | Substation-Adjacent | IA | Plymouth County | 161 kV | 100 MW | 4.3 yrs | 62.6 |
| UNKNOWN130481 | Substation-Adjacent | IA | Sioux County | 230 kV | 300 MW | 4.3 yrs | 62.0 |
| TAP137004 | Substation-Adjacent | IA | Plymouth County | 161 kV | 100 MW | 4.3 yrs | 61.7 |
| UNKNOWN137000 | Substation-Adjacent | IA | Plymouth County | 161 kV | 100 MW | 4.3 yrs | 60.4 |
| TAP168130 | Substation-Adjacent | IA | Plymouth County | 69 kV | 50 MW | 4.3 yrs | 59.8 |
| OZ Plymouth | Greenfield | IA | Plymouth | — | — | 4.3 yrs | 59.8 |
| UNKNOWN168129 | Substation-Adjacent | IA | Plymouth County | 69 kV | 50 MW | 4.3 yrs | 59.7 |
How do candidate sites near TAP159178 score?
The 8 highest-scoring candidate sites within about 25 miles range from 60 to 68 on the 0–100 DC Readiness scale. They fall in Plymouth County, Sioux County, Plymouth. The Iowa average across 2,572 scored sites is 56.4. 761 of those Iowa sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP159178 substation?
TAP159178 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 TAP159178 is below the national midpoint.
How many transmission lines connect to TAP159178 substation?
3 transmission lines terminate at or pass through TAP159178 in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 13.1 miles.
Where is TAP159178 substation located?
TAP159178 is in Iowa at 42.9671, -96.2632. The datacenter candidate sites closest to it are in Plymouth County, Sioux County, Plymouth.
Are there datacenter candidate sites near TAP159178 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP159178. The highest-scoring is SIOUX CITY at 68/100. Across Iowa, the average DC Readiness score is 56.4.
More in Iowa
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, “TAP159178 substation, Iowa”, https://gridcensus.com/substations/iowa/tap159178-83d52a2d (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 TAP159178 substation, Iowa 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.