Exhibit 99.1

Duke Energy Progress

Summary of 2017 Rate Case Filing in North Carolina

(Docket No. E-2, Sub 1142)

Preliminary Notice of Partial Settlement

·On Nov. 20, 2017, Duke Energy Progress (DEP) and the Public Staff - North Carolina Utilities Commission (Public Staff) notified the North Carolina Utilities Commission (NCUC) that DEP and Public Staff (the Parties) have reached a preliminary partial settlement in principle (Preliminary Settlement) related to certain issues in the docket

·Key matters resolved in the Preliminary Settlement include:

·Return on equity of 9.9% based upon a capital structure of 52% equity and 48% debt

·Certain adjustments will be made to rate base for the Mayo Zero Liquid Discharge and Sutton combustion turbine projects

·The deferred tax liability resulting from the NC state income tax change will be returned to customers over four years (rather than five years as proposed by DEP)

·The company’s depreciation rates shall be based on DEP’s filed Depreciation Study, with exceptions to be further defined in the final agreement.

·Other revenue requirement, cost of service and rate design matters will be further defined in the final agreement and be based upon updated property, plant & equipment, accumulated depreciation and revenues calculated through Oct. 31, 2017

·Key issues on which the parties have not reached a compromise include:

·Coal ash basin deferred costs to be recovered and amortization period, and ongoing coal ash costs to be included in rates

·Deferred storm costs to be recovered and amortization period

·The parties will endeavor to file a final, definitive partial settlement agreement with further details and supporting testimony prior to the commencement of the evidentiary hearing, currently scheduled to begin on Nov. 27, 2017

·A partial settlement will be subject to the review and approval by the NCUC

Background

·On June 1, 2017, DEP filed a rate case with the NCUC to request an average 14.9 percent increase in retail revenues, or approximately $477 million:

·The rate case filing requested an overall rate of return of 7.66% based on approval of a 10.75% return on equity and a 53% equity component of the capital structure

·The filing is based on a North Carolina rate base of $8.1 billion as of December 31, 2016 and adjusted for known and measurable changes through August 2017 (hearings are expected to commence late this year)

·This rate increase request is driven by:

Drivers	Revenue Requirement		% of Total Request
Significant Plant Additions and Changes	$	253 million	53	%
Coal Ash Pond Closure costs	$	195 million	41	%
All other changes to rate base, operating costs, and operating revenues	$	29 million	6	%

·Major capital investments(1) including pro-forma adjustments to reflect known and measurable changes include:

·Four new solar sites - $184 million

·Combustion Turbine Units at the Sutton site - $120 million

·Additional investment to complete the combined cycle natural gas-fueled units at the Sutton site (Construction Work-In-Progress included in the 2013 rate case) - $103 million

·Zero Liquid Discharge wastewater treatment system at the Mayo site - $141 million

·Construction Work-In-Progress for the new natural gas-fueled units at the Asheville site (Western Carolinas Modernization Project) - $193 million

·Coal Ash Pond Closure costs include:

·$67 million to recover previously incurred expenses over a five year period

·$129 million for ongoing expenses

·The request also included the recovery of deferred storm costs, including costs incurred to restore service from the historic impacts of Hurricane Matthew, in the amount of $30 million per year for three years.

·The Company has requested the NCUC approve the requested rates to be effective Jan. 1, 2018

(1)  Represents Duke Energy Progress total investment, which is allocated ~60% to NC.