US utilities publish no UK-style substation headroom, so each market is built from what it does publish: utility feeder data, ISO interconnection queues, transmission and flood maps. We start with Boston and widen to the rest of Massachusetts and other markets from there. Each market card shows its top Connectability Score, a 0 to 100 screen of how easily a load could connect.
Live: clusters and candidate sites ranked by National Grid feeder headroom, with the ISO-NE queue, demand forecast, flood zones and land use.
The world's largest market, and the tightest: Dominion's queue, PJM capacity prices and substation constraints.
Dense urban load with limited land: Con Edison and PSEG capacity, plus conversions.
Fast-growing load served by vertically integrated utilities, where capacity is agreed rather than queued.
The most open queue data in the US, including large loads, on a grid of its own.
Two grids, long queues and cheap land; Columbus is the fastest-growing cluster.
Water and heat shape siting as much as power does, across many utilities.