Public HIFLD transmission lines and substations from Chicago to the Carolinas, drawn with PJM's zones. Place a site, county, or data-center campus against the network geography without an account, then open the same layers on the live map.
The transmission-line and substation features in the Homeland Infrastructure Foundation-Level Data (HIFLD) public inventory, shown across the PJM footprint with the market's zones and the same layers available in Ask the Grid's live map.
PJM's detailed network models and planning cases are restricted as Critical Energy/Electric Infrastructure Information (CEII), so the public inventory is where most siting conversations start. Use it to see which corridors and substations sit near a site and which zone it falls in, then take available capability, constraints, and feasibility to PJM's planning and interconnection process.
The transmission lines and substations published in the HIFLD public inventory, drawn across PJM's footprint and zones. It is geographic reference data — the operational network model, line ratings, and real-time flows stay with PJM and the transmission owners.
PJM's detailed system maps and power-flow cases are CEII and need an approved request to access. This View is built entirely from public data, so it answers the orientation question — where the lines and substations are — without that process.
It shows where the public network geography runs, which is the starting point. Whether a specific point of interconnection works is settled by PJM's interconnection studies and the transmission owner.
Yes. It opens the live PJM workspace with the same transmission, substation, and zone layers and the same viewport shown on this page.