PJM
The largest US regional grid operator, covering the mid-Atlantic and a major data-center hub with long queues.
Current numbers
$500k study + $15k/MWPJM interconnection deposits committed before the design is frozen: a fixed study deposit (hundreds of thousands, non-refundable once the request completes) plus a $15k/MW readiness deposit
~3–7+ yrlarge-load interconnection end-to-end; PJM application-to-COD has exceeded 8 yr; up to ~10 yr in worst queues
~3–7+ yrgrid interconnection lead time (large load); PJM application-to-COD over 8 yr; up to ~10 yr worst queues