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Duke Energy has sought Indiana Utility Regulatory Commission (IURC) approval to implement clean coal technology at existing generation facilities in the following cases, including approval to recover the costs through rates.
A settlement agreement among PSI Energy, the Indiana Office of Utility Consumer Counselor (OUCC), and a group of industrial customers was approved in May 2006 (IURC Cause Nos. 42622 & 42718). It allowed the utility to comply with sulfur dioxide, nitrogen oxide and mercury reduction requirements under the U.S. Environmental Protection Agency's (EPA's) Clean Air Interstate Rule (CAIR) and Clean Air Mercury Rule (CAMR), with construction projects at the utility's Cayuga, Gallagher and Gibson generating stations completed between 2005 and 2012.
In April 2013, Duke Energy received authorization to install new pollution control equipment at its Cayuga, Gallagher and Gibson generating stations, primarily to reduce mercury emissions (IURC Cause No. 44217). The utility also received approval to recover the construction costs through rates, with rate adjustments to be requested every six months.
In filings with the IURC, Duke Energy stated that the U.S. Environmental Protection Agency's (EPA's) Utility Mercury and Air Toxics Standard (MATS) rule was the primary reason for its request. The OUCC filed testimony with the IURC on November 29, 2012, recommending reductions to the costs Duke Energy was seeking to recover. The Commission's order reduced the allowed cost recovery by more than $50 million from the utility's original request.
In a newly filed case (IURC Cause No. 44418), Duke Energy is seeking approval of additional pollution control equipment at its Gibson, Cayuga and Edwardsport generating stations, focusing on reductions of particulate matter and mercury emissions in order to comply with the U.S. Environmental Protection Agency's (EPA's) Utility Mercury and Air Toxics Standard (MATS) rule.
The utility estimates total capital costs for Phase 3 at $113 million (not including financing). Its key filings include:
The Indiana Office of Utility Consumer Counselor (OUCC) will review Duke Energy's request and file testimony on a future date to be determined.
To review all public filings in these cases, please visit the IURC's electronic document system and enter the appropriate docket number.
This page will be updated based on future developments.