Backup, Maintenance, and Supplemental Power Rate Review

Indiana Code 8-1-2.4-4(h) was added by SEA 309, effective July 1, 2017, and requires the Commission to:

  1. review the backup, maintenance, and supplemental power rates;
  2. identify the extent to which the rates are cost based, nondiscriminatory, and do not result in the subsidization of costs within or among customer classes; and
  3. report the Commission’s findings to the Interim Study Committee on Energy, Utilities, and Telecommunications before November 1, 2018.  This new subsection expires on November 2, 2018. 

In GAO 2017-3 (see link below), the Commission has delegated this authority to Commission staff to perform these review, identification, and reporting requirements through an open, transparent, process, in which interested stakeholders may submit information and written comments to Commission staff.   The GAO sets for the following initial timelines:

  • January 16, 2018 – Commission staff shall distribute its questions and requests for information to the electric utilities.
  • March 16, 2018 – Electric utilities shall provide their data and responses.
  • April 20, 2018 – all interested persons, associations, and companies may submit their written comments.
  • May 25, 2018 - Additional comment period for all parties.

Commission staff may hold meetings and technical conferences and may establish additional comment periods at staff’s discretion.

All information and documents regarding this review will be posted and linked on this webpage.


GAO 2017-3: Backup, Maintenance, and Supplemental Power Rate Review Procedure

Indiana Utility Regulatory Commission Staff Request for Information

Initial Comments from Electric Utilities

Duke Energy - submitted March 15, 2018 | PDF

Indiana Michigan Power (I&M) - submitted March 16, 2018 | PDF | Attachments | Tariffs

Indiana Municipal Power Agency (IMPA) - submitted March 7, 2018 | PDF | Lawrenceburg Tariff

Indianapolis Power & Light (IPL) - submitted March 15, 2018 | PDF

Northern Indiana Public Service Company (NIPSCO) - submitted March 15, 2018 | PDF

Vectren - submitted March 15, 2018 | PDF | Tariff | Cost of Service Study


Alliance for Industrial Efficiency - submitted April 20, 2018 | PDF

Indiana Industrial Energy Consumers, Inc. (INDIEC) - submitted April 20, 2018 | PDF

Midwest Cogeneration Association (MCA) - submitted April 20, 2018 | PDF | Attachment