FERC on Wednesday approved Exelon’s request for recovery of more than $1.5 million in fuel costs for its natural gas-fired Mystic Generation Station in Everett, Mass. (ER17-933).

The commission order granted Exelon $1,554,854 for Mystic Units 8 and 9 fuel costs that were not recovered because of market power mitigation measures applied last October and November.

ISO-NE’s Internal Market Monitor challenged Exelon’s request for cost recovery for mitigated hours on three days in October 2016, arguing that the company did not adequately provide data in its initial request, and that further supplemental information was submitted past the due date under the RTO’s Tariff.

“We disagree with the IMM’s position that Exelon’s alleged failure to timely submit information to the IMM for operating days Oct. 1, 3 and 4, 2016, precludes Exelon from seeking additional cost recovery for those days,” the commission said in response. “We do not find that failure to meet that deadline alone necessarily operates as a procedural bar to submitting a [Federal Power Act] Section 205 filing for additional cost recovery or renders such a filing unjust and unreasonable.” It noted that Exelon’s initial filing was submitted on time and that the Monitor did not dispute that certain required information was unavailable to the company at the time.

Exelon also asked to recover nearly $57,000 in regulatory costs in connection with its filing, as well as additional regulatory costs it might incur in connection with the proceeding after the date of its filing. The commission granted this request subject to a compliance filing due in 60 days that details the total regulatory costs.

— Michael Kuser