Public HIFLD transmission lines and substations across the ERCOT grid, drawn with its zones. Pan and zoom the network instead of reading a static map, then open the same layers on the live map.
The transmission-line and substation features in the HIFLD public inventory, placed beside ERCOT's zones on Ask the Grid's interactive map, with the same layers available in the live ERCOT workspace.
Texas's transmission story is distance: wind and solar in West Texas, load in the Houston, Dallas–Fort Worth, Austin, and San Antonio metros, and the corridors between them. Read the public line and substation geography against the zones to see where a site sits in that picture, then use ERCOT planning studies and transmission-owner records for ratings, constraints, and available capability.
The transmission lines and substations published in the HIFLD public inventory, drawn across ERCOT's zones. It is geographic reference data — the operational network model, line ratings, and real-time flows stay with ERCOT and the transmission service providers.
The map is framed on the ERCOT grid. Parts of Texas — the far west around El Paso, much of the Panhandle, and parts of East and Northeast Texas — are served by other grids, and the public inventory there belongs to those systems rather than to ERCOT.
It shows where the public network geography runs, which is the starting point. Whether a specific point of interconnection works is settled by ERCOT's generation interconnection process and the transmission service provider.
Yes. It opens the live ERCOT workspace with the same transmission, substation, and zone layers and the same viewport shown on this page.