HENRY CO
SubstationIowa
At a glance
HENRY CO is an electric transmission substation in Iowa. It is classified as sub-transmission (138 kv) and connects 2 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 |
|---|---|---|---|---|
| #100432 | 161 kV | — | IN SERVICE | 13.8 mi |
| #140001 | 161 kV | — | IN SERVICE | 24.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of HENRY CO, 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 |
|---|---|---|---|---|---|---|---|
| EC Near Mt Pleasant | Greenfield | IA | Henry | — | — | 4.3 yrs | 58.9 |
| EC Near Mt Pleasant | Greenfield | IA | Henry | — | — | 4.3 yrs | 58.8 |
| EC Near Mt Pleasant | Greenfield | IA | Henry | — | — | 4.3 yrs | 58.7 |
| EC Near Alliant SBD 9402 Climax | Greenfield | IA | Lee | — | — | 4.3 yrs | 58.4 |
| Mt Pleasant | Brownfield | IA | Henry County | — | 9 MW | 4.3 yrs | 58.4 |
| EC Near Agency GT | Greenfield | IA | Des Moines | — | — | 4.3 yrs | 58.2 |
| EC Near Agency GT | Greenfield | IA | Des Moines | — | — | 4.3 yrs | 58.2 |
| EC Near Mt Pleasant | Greenfield | IA | Henry | — | — | 4.3 yrs | 58.1 |
How does HENRY CO compare with other substations in Iowa?
Iowa has 1,368 substation records in HIFLD, of which 104 carry a station name; the rest are unnamed tap points, risers and line ends. 55 named substations in the state are in HENRY CO's 115–229 kV band (53% of named stations). 30 sit in a higher band. 30 named substations in Iowa operate at 345 kV or above. The highest voltage recorded in the state is 345 kV, and the state median is 161 kV.
How do candidate sites near HENRY CO score?
The 8 highest-scoring candidate sites within about 25 miles range from 58 to 59 on the 0–100 DC Readiness scale. They fall in Henry, Lee, Henry County, Des Moines. 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 HENRY CO substation?
HENRY CO has a maximum voltage of 161 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so HENRY CO is above the national midpoint.
How many transmission lines connect to HENRY CO substation?
2 transmission lines terminate at or pass through HENRY CO in the HIFLD line data. The connected lines listed here run at 161 kV. Together the listed lines cover about 38.3 miles.
Where is HENRY CO substation located?
HENRY CO is in Iowa at 40.9237, -91.5389. The datacenter candidate sites closest to it are in Henry, Lee, Henry County.
Are there datacenter candidate sites near HENRY CO substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of HENRY CO. The highest-scoring is EC Near Mt Pleasant at 59/100. Across Iowa, the average DC Readiness score is 56.4.
Other 161 kV substations 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, “HENRY CO substation, Iowa”, https://gridcensus.com/substations/iowa/henry-co-68c73247 (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 HENRY CO 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.