... is concerned with the Oklahoma Corporation Commission's (OCC) lengthy review of Oklahoma Gas & Electric Co.'s (OG&E) environmental compliance plan, the last general rate case (GRC) and unfavorable rate order. The approval of the company's dry scrubbers installation took 21 months and the general rate case order took nearly 15 months. OG&E implemented an interim rate increase on July 1, 2016, which was permitted after 180 days of filing, reducing partially the regulatory lag. Construction Projects and Rate Filings: OG&E is subject to various environmental compliance requirements associated with its coal fired generation fleet. OG&E is executing over $1 billion of environmental control projects primarily to comply with regional haze rule and modernize its fleet. Major projects include installing scrubbers on its Sooner Units 1 and 2 and the Mustang Modernization Plan. OG&E's long-term rating stability depends on the outcome of future rate case...