PHI announces delay in MAPP transmission project

Washington, D.C., August 19, 2011 — Pepco Holdings, Inc. notified the Maryland Public Service Commission and Virginia State Corporation Commission that the company is requesting temporary delays in the commissions’ reviews of the respective applications filed by the utility’s subsidiaries, Pepco and Delmarva Power, for state regulatory approval for the Mid-Atlantic Power Pathway.

MAPP is a proposed, high-voltage, 152-mile interstate transmission project planned to originate at the Possum Point substation in northern Virginia, traverse under the Chesapeake Bay and end at the Indian River substation in Delaware.

The requests were filed following notification from PJM Interconnection, the regional electric grid operator, that it has established a new in-service date for MAPP.

The notification also states that PJM will be using a new stakeholder process to evaluate its transmission planning methods, which could lead to changes in PJM’s assessment of MAPP’s in-service date. PJM does not expect the new evaluation to be completed until sometime in 2012.

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