TAP168166
SubstationIowa · MIDAMERICAN ENERGY CO
At a glance
TAP168166 is an electric transmission substation in Iowa, on MIDAMERICAN ENERGY 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #169380 | 69 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 7.0 mi |
| #169381 | 69 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 2.0 mi |
| #169384 | 69 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 3.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP168166, 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 |
|---|---|---|---|---|---|---|---|
| OZ Calhoun | Greenfield | IA | Calhoun | — | — | 4.3 yrs | 58.7 |
| UNKNOWN131391 | Substation-Adjacent | IA | Carroll County | 161 kV | 100 MW | 4.3 yrs | 58.6 |
| UNKNOWN130997 | Substation-Adjacent | IA | Carroll County | 161 kV | 100 MW | 4.3 yrs | 58.6 |
| UNKNOWN130423 | Substation-Adjacent | IA | Sac County | 161 kV | 100 MW | 4.3 yrs | 58.3 |
| EC Near Alta Municipal Utilities | Greenfield | IA | Buena Vista | — | — | 4.3 yrs | 57.9 |
| UNKNOWN130489 | Substation-Adjacent | IA | Crawford County | 161 kV | 100 MW | 4.3 yrs | 57.7 |
| UNKNOWN130434 | Substation-Adjacent | IA | Pocahontas County | 161 kV | 100 MW | 4.3 yrs | 57.7 |
| UNKNOWN130492 | Substation-Adjacent | IA | Ida County | 161 kV | 100 MW | 4.3 yrs | 57.4 |
Who owns the transmission lines at TAP168166?
The 3 connected lines listed above are owned by MIDAMERICAN ENERGY CO. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 12 miles.
How do candidate sites near TAP168166 score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 59 on the 0–100 DC Readiness scale. They fall in Calhoun, Carroll County, Sac County, Buena Vista. 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 TAP168166 substation?
TAP168166 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 TAP168166 is below the national midpoint.
How many transmission lines connect to TAP168166 substation?
3 transmission lines terminate at or pass through TAP168166 in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 12 miles.
Who owns TAP168166 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP168166 belong to MIDAMERICAN ENERGY CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP168166 substation located?
TAP168166 is in Iowa at 42.3117, -95.0904. The datacenter candidate sites closest to it are in Calhoun, Carroll County, Sac County.
Are there datacenter candidate sites near TAP168166 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP168166. The highest-scoring is OZ Calhoun at 59/100. 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, “TAP168166 substation, Iowa”, https://gridcensus.com/substations/iowa/tap168166-a757f6ed (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 TAP168166 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.