Transmission savings study puts PJM at the center of grid buildout

Utility Dive reported on Sept. 2, 2026, on a study of the Eastern Interconnection that identifies roughly a dozen interregional and intraregional transmission projects, each capable of meeting load growth, lowering retail electric rates, bolstering reliability, and supporting U.S. security. The projected savings run to billions, PJM features prominently in the gains, and capital allocators now have a reason to pay attention.

The finding is a ratepayer story before it is an investor story, and a buildout that lowers household and business power bills gives regulators a number they can defend in a rate case. That matters most for interregional lines, where benefits spill across utility service territories and costs are hardest to assign. A concrete retail-rate saving gives every participant in a cost-allocation debate a common starting point; in PJM, where the study says the savings concentrate, that common number makes new interregional lines easier to approve than a reliability-only pitch.

As this publication has argued, grid access is becoming the asset class that decides where load can grow, and the buildout will be gated by consent before capital. The study reinforces the first half of that case: transmission value shows up in avoided rate increases, not just in reliability margins. The savings materialize only after lines are energized, and lines are energized only after siting, permitting, and cost allocation are settled; each step carries its own delay risk, and the load growth making the lines necessary will not pause for the paperwork. The study shortens none of the timeline, but it makes the prize legible enough to justify starting. In PJM, where the study identifies particular opportunity, that ordering is as important as the arithmetic.

The study's force lies in the aggregate rather than in any single line, and that aggregate gives PJM and the broader Eastern Interconnection a quantified reason to bring more projects into regional plans. The next step is a planning exercise with actual lines attached, and a credible savings benchmark gives project sponsors a number to cite before construction risk is on the table. Developers will read the report as encouragement; the assets that actually move will be the ones with route certainty and a settled cost allocation.

The study cannot order a line built, and it does not try. What it can do is make the cost-allocation argument easier for every project that follows; until PJM's planning process turns aggregate savings into specific lines and approved cost sharing, the billions are real math waiting on consent.