TAP137700
SubstationIowa · CITY OF MONTEZUMA - (IA)
At a glance
TAP137700 is an electric transmission substation in Iowa, on CITY OF MONTEZUMA - (IA)'s transmission network. It is classified as unclassified 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
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #110658 | — | — | IN SERVICE | 0.0 mi |
| #120900 | — | MIDAMERICAN ENERGY CO | IN SERVICE | 6.0 mi |
| #175807 | — | CITY OF MONTEZUMA - (IA) | — | 9.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP137700, 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 |
|---|---|---|---|---|---|---|---|
| Marshall County Landfill Solar | Brownfield | IA | Marshall | — | 0 MW | 4.3 yrs | 65.2 |
| EC Near Metro Methane Recovery Facility | Greenfield | IA | Polk | — | — | 4.3 yrs | 64.8 |
| MONTEZUMA SWITCHING STATION | Substation-Adjacent | IA | Poweshiek County | 345 kV | 600 MW | 4.3 yrs | 63.3 |
| Sutherland | Brownfield | IA | Marshall County | — | 157 MW | 4.3 yrs | 63.0 |
| EC Near Metro Methane Recovery Facility | Greenfield | IA | Polk | — | — | 4.3 yrs | 62.9 |
| EC Near Metro Methane Recovery Facility | Greenfield | IA | Polk | — | — | 4.3 yrs | 62.4 |
| EC Near Sutherland | Greenfield | IA | Marshall | — | — | 4.3 yrs | 61.7 |
| EC Near Brooklyn | Greenfield | IA | Poweshiek | — | — | 4.3 yrs | 60.7 |
Who owns the transmission lines at TAP137700?
The 3 connected lines listed above are owned by MIDAMERICAN ENERGY CO, CITY OF MONTEZUMA - (IA). Their combined recorded length is about 15.5 miles.
How do candidate sites near TAP137700 score?
The 8 highest-scoring candidate sites within about 25 miles range from 61 to 65 on the 0–100 DC Readiness scale. They fall in Marshall, Polk, Poweshiek County, Marshall County. 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
How many transmission lines connect to TAP137700 substation?
2 transmission lines terminate at or pass through TAP137700 in the HIFLD line data. Together the listed lines cover about 15.5 miles.
Who owns TAP137700 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP137700 belong to CITY OF MONTEZUMA - (IA), and others to MIDAMERICAN ENERGY CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP137700 substation located?
TAP137700 is in Iowa at 41.7063, -92.9049. The datacenter candidate sites closest to it are in Marshall, Polk, Poweshiek County.
Are there datacenter candidate sites near TAP137700 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP137700. The highest-scoring is Marshall County Landfill Solar at 65/100. 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, “TAP137700 substation, Iowa”, https://gridcensus.com/substations/iowa/tap137700-c03154b8 (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 TAP137700 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.