TAP137756
SubstationIowa
At a glance
TAP137756 is an electric transmission substation in Iowa. 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #111253 | — | — | — | 0.1 mi |
| #126046 | — | — | IN SERVICE | 6.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP137756, 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 |
|---|---|---|---|---|---|---|---|
| WALTER SCOTT ENERGY CENTER | Substation-Adjacent | IA | Mills County | 345 kV | 600 MW | 4.3 yrs | 70.3 |
| FORT CALHOUN | Substation-Adjacent | NE | Washington County | 345 kV | 600 MW | 4.3 yrs | 69.4 |
| UNKNOWN131416 | Substation-Adjacent | IA | Mills County | 345 kV | 600 MW | 4.3 yrs | 69.0 |
| UNKNOWN137755 | Substation-Adjacent | IA | Mills County | 345 kV | 600 MW | 4.3 yrs | 69.0 |
| UNKNOWN131651 | Substation-Adjacent | NE | Sarpy County | 345 kV | 600 MW | 4.3 yrs | 68.7 |
| UNKNOWN131665 | Substation-Adjacent | NE | Sarpy County | 345 kV | 600 MW | 4.3 yrs | 68.5 |
| OPPD BLONDO STREET | Substation-Adjacent | NE | Douglas County | 345 kV | 600 MW | 4.3 yrs | 68.2 |
| UNKNOWN131751 | Substation-Adjacent | NE | Sarpy County | 345 kV | 600 MW | 4.3 yrs | 67.4 |
How do candidate sites near TAP137756 score?
The 8 highest-scoring candidate sites within about 25 miles range from 67 to 70 on the 0–100 DC Readiness scale. They fall in Mills County, Washington County, Sarpy County, Douglas 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 TAP137756 substation?
2 transmission lines terminate at or pass through TAP137756 in the HIFLD line data. Together the listed lines cover about 7 miles.
Where is TAP137756 substation located?
TAP137756 is in Iowa at 41.1793, -95.8415. The datacenter candidate sites closest to it are in Mills County, Washington County, Sarpy County.
Are there datacenter candidate sites near TAP137756 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP137756. The highest-scoring is WALTER SCOTT ENERGY CENTER at 70/100. 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, “TAP137756 substation, Iowa”, https://gridcensus.com/substations/iowa/tap137756-c649a9e4 (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 TAP137756 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.