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Dive Brief:

A group of 80 Maryland state lawmakers are backing a complaint at the Federal Energy Regulatory Commission over the PJM Interconnection’s cost allocation for transmission lines that support data centers.

Driven by the way PJM spreads transmission costs, Maryland ratepayers will pay $1.6 billion over the next decade for transmission projects that were approved in the grid operator’s last three regional transmission expansion plans that are designed to mainly serve out-of-state data centers, Maryland’s ratepayer advocate — the Office of People’s Counsel — said in its May 7 complaint.

“While PJM’s rules are unfair for many PJM states, they impact Maryland disproportionately simply because Maryland sits next to Data Center Alley in Virginia,” the Maryland lawmakers said in a Wednesday filing at FERC. “Given the projections of massive data center growth — more than 80,000 megawatts over the next 20 years — PJM is likely to bill Maryland customers billions more for future data center-driven transmission costs.”