NIPSCO Gas Infrastructure Plan

A 2013 state law allows electric and natural gas utilities to seek IURC approval of 7-year infrastructure plans. If a utility’s plan is approved, it is then allowed to request rate increases every 6 months to cover the costs of projects in the plan. The law requires the IURC to consider the plans and increases within very short timeframes.

Northern Indiana Public Service Company’s (NIPSCO’s) natural gas utility received approval of such a plan in April 2014, referring to the program as its Natural Gas Infrastructure Modernization Plan.

In recent tracker filings:

  • NIPSCO’s June 2016 TDSIC adjustment raised the monthly residential gas bill for a customer using 72 therms (an average monthly amount over the course of a year) by $2.67 over the utility's base rates.
  • In December 2016, the IURC approved NIPSCO's request to decrease that amount to $1.87. OUCC testimony recommended approval of the request.
  • NIPSCO's adjustment receiving Commission approval in June 2017 raised the 72-therm amount by 36 cents, to $2.23. For the case file, click here, enter cause number 44403, and click the link for "44403 TDSIC 6."
  • In December 2017, NIPSCO received approval of an adjustment that will reduce the 72-therm amount by 60 cents, to $1.63. The OUCC filed testimony (Grosskopf and Golden) in October 2017. 
  • NIPSCO's pending tracker filing would raise the 72-therm amount by $2.51, to $4.14. For the case file (Cause No. 44403-TDSIC 8), click here. The OUCC filed testimony (Grosskopf and Golden) on April 30, 2018.

A brief summary of the 2013 law

Indiana Code 8-1-39 allows electric and natural gas utilities to submit 7-year infrastructure improvement plans for IURC approval. It requires the IURC to rule within 210 days once such a request is filed.

  • Once a 7-year plan receives IURC approval, the utility may request incremental rate increases every 6 months to pay for the projects. The rate adjustment is referred to as the Transmission, Distribution and Storage System Improvement Charge (TDSIC). The IURC has 90 days to rule on such a request.
  • TDSIC rate increases are limited to no more than 2 percent of total retail revenues.
  • The TDSIC rate adjustment (or tracker) allows the utility to recover 80 percent of the costs as they are incurred. The remaining costs are deferred until the utility's next base rate case, which must be filed before the end of the 7-year period.

NIPSCO's Seven-Year Plan

NIPSCO filed its seven-year natural gas system improvement plan in October 2013, in IURC Cause No. 44403. The utility's testimony and exhibits stated that:

  • The plan would include about $713.1 million in capital improvement projects.
  • Projects throughout NIPSCO's natural gas service territory would include replacement of aging infrastructure, new transmission mains, the installation of automated valves, and expansion into rural areas that currently do not have natural gas service.
  • Construction would start in 2014 with the first rate increase of approximately 1.0 percent taking effect in 2015.
  • Annual rate increase amounts from 2016 through 2020 would vary by year, ranging from 1.5 percent to 1.9 percent each year. The average annual percentage increase over the 7-year term would be 1.4 percent.