2018-27729. Notice of Institution of Section 206 Proceeding and Refund Effective Date: Duke Energy Florida, LLC

On December 14, 2018, the Commission issued an order in Docket No. EL19-23-000, pursuant to section 206 of the Federal Power Act (FPA), 16 U.S.C. 824e (2012), instituting an investigation into whether Duke Energy Florida, LLC's increased estimate to procure, install and construct the interconnection facilities and network upgrades for the Large Generator Interconnection Agreement with U.S. EcoGen Polk, LLC may be unjust and unreasonable. Duke Energy Florida, LLC, 165 FERC ¶ 61,230 (2018).

The refund effective date in Docket No. EL19-23-000, established pursuant to section 206(b) of the FPA, will be the date of publication of this notice in the Federal Register.

Any interested person desiring to be heard in Docket No. EL19-23-000 must file a notice of intervention or motion to intervene, as appropriate, with the Federal Energy Regulatory Commission, 888 First Street NE, Washington, DC 20426, in accordance with Rule 214 of the Commission's Rules of Practice and Procedure, 18 CFR 385.214, within 21 days of the date of issuance of the order.

Dated: December 14, 2018.

Nathaniel J. Davis, Sr.,

Deputy Secretary.