Clean Air Act Approval and Promulgation of Air Quality Implementation Plan Revision for Colorado; Long-Term Strategy of State Implementation Plan for Class I Visibility Protection, Part I: Hayden Station Requirements

EPA is approving a revision to the long-term strategy portion of Colorado's State Implementation Plan (SIP) for Class I Visibility Protection, contained in Section VI of the document entitled ``Long- Term Strategy Review and Revision of Colorado's State Implementation Plan for Class I Visibility Protection, Part I: Hayden Station Requirements,'' as submitted by the Governor with a letter dated August 23, 1996. The revision incorporates into the SIP, among other things, emissions reduction requirements for the Hayden Station (a coal-fired steam generating plant located near the town of Hayden, Colorado) that are based on a consent decree addressing numerous air pollution violations at the plant. The SIP revision is expected to remedy Hayden Station's contribution to visibility impairment in the Mt. Zirkel Wilderness Area and, therefore, make reasonable progress toward the Clean Air Act National visibility goal with respect to such contribution. On October 3, 1996, EPA published a notice of proposed rulemaking that proposed to approve this SIP revision and provided a thirty-day period for public comment. EPA received one set of generally supportive comments regarding the proposed revision, and is therefore finalizing the proposal without modification.