PR-12-65 -- PSC Sets Deadline To Respond In Ameren Missouri Request

Contact: Kevin Kelly (573) 751-9300

FOR IMMEDIATE RELEASE -- NOVEMBER 28, 2011

JEFFERSON CITY---Union Electric Company d/b/a Ameren Missouri has filed an application with the Missouri Public Service Commission for authority to exchange SO2 emissions allowances for NOx emissions allowances.

Ameren Missouri seeks authority from the Commission for: 1) a one-time exchange of surplus sulfur dioxide (SO2) emission allowances for annual nitrogen oxide (NOx) emission allowances, which would enable Ameren Missouri to acquire a sufficient number of annual NOx allowances to comply with the requirements of the United States Environmental Protection Agency’s “Cross-State Air Pollution Rule,” which takes effect January 1, 2012; and 2) authorization to defer to Account 254, Other Regulatory Liabilities, the revenues associated with the SO2 portion of the proposed exchange of emissions allowances and to amortize the deferred amounts concurrently with the Company’s use of the acquired NOx allowances.

The staff of the Missouri Public Service Commission is to file a recommendation regarding its examination and analysis of Ameren Missouri’s application no later than December 5, 2011.  In addition, any other party that wishes to file a response to Ameren Missouri’s application, or who seeks a hearing in the matter, must make such a response or request with the Commission no later than December 5, 2011.

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Case No. EO-2012-0158