/ Secretary, PA Public Utility Commission
400 North Street, 2nd Floor
Harrisburg, Pennsylvania 17120 / IN REPLY PLEASE REFER TO OUR FILE

June 19, 2017

Docket No. P-2016-2543140

MICHAEL ZIMMERMAN

DUQUESNE LIGHT COMPANY

411 SEVENTH AVENUE

MAIL DROP 15-7

PITTSBURGH PA 15219

Re: Duquesne Light Company – Addendum to Default Service Plan VIII Compliance Filing;

Supplement No. 25 to Electric – PA. P.U.C. No. 3S

Dear Mr. Zimmerman:

By Order enteredDecember 22, 2016 (December Order), the Commission authorized Duquesne Light Company (Duquesne or the Company)to file a tariff supplement containing the terms and conditions of the Company’s Default Service Plan VIII for the Period June 1, 2017 to May 31, 2021, consistent with the Non-Unanimous Settlement filed in the above docketed rate investigation. On April 28, 2017, the Company filed Supplement No. 155 to Tariff Electric – PA. P.U.C. No. 24and Supplement No. 24 to Electric – PA. P.U.C. No. 3Sto become effective June 1, 2017. The supplementswere approved by the Commission via Secretarial Letter dated May 15, 2017 as in compliance with the December Order.

On May 26, 2017, Duquesne filed Supplement No. 25 to Electric – PA. P.U.C. No. 3S (Supplement No. 25) as an addendum to the Company’s Default Service Plan VIII compliance tariff filing. Supplement No. 25 makes updates to the Company’s supplier tariff that were inadvertently omitted from the compliance filing, regarding continuation of the Company’s ability to contract with Electric Generation Suppliers to provide Time-of-Use (TOU) service. Duquesne avers that the proposed supplier tariff changes are consistent with the Non-Unanimous Settlement in the Company’s Default Service Plan VIII at the above docket.

Duquesne has requested a waiver of the notice requirements in 52 Pa. Code § 53.101 to allow the proposed supplementto be effective June 1, 2017. Duquesne avers that this is consistent with the effective date of the previously approved compliance filings, and that the proposed compliance addendum is designed to maintain status quo, with no new changes to the Company’s TOU, and is consistent with the Non-Unanimous Settlement.

Commission Staff has reviewed the tariff revisions and found that suspension or further investigation does not appear warranted at this time. Therefore, in accordance with 52 Pa. Code, Supplement No. 25 to Electric – PA. P.U.C. No. 3S is effective by operation of law according to the effective date contained on each page. However, this is without prejudice to any formal complaints timely filed against said tariff revisions.

If you have any questions in this matter, please contact Marissa Boyle, Bureau of Technical Utility Services, at 717-787-7237 or .

Sincerely,

Rosemary Chiavetta

Secretary