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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. NIPSCO’s most recent increases under the plan were approved in March 2016 and June 2016. To date, the TDSIC adjustment has 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.
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.
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: