WREG prepared the air quality analyses and sections for two Environmental Impact Statements (EISs) for proposed transmission lines in Utah. The first EIS was for the Mona to Oquirrh Transmission Corridor Project. Rocky Mountain Power, a division of PacifiCorp, applied to the Bureau of Land Management (BLM) for a right-of-way grant to use public lands for portions of the Project. The BLM was the lead federal agency for National Environmental Policy Act (NEPA) review and preparation of the EIS. WREG prepared emission estimates and impact analyses for transmission line construction activities, including mobile source emissions, heavy equipment emissions, paved and unpaved road dust, fugitive dust from earthmoving activities, and construction and operation of a concrete batch plant. Emissions and impacts were also evaluated from construction or expansion of substations. Because the project traversed portions of several nonattainment areas, a detailed general conformity analysis was also conducted.
WREG also prepared air quality analyses and document sections for Rocky Mountain Power’s proposed Sigurd to Red Butte No. 2 345kV Transmission Project EIS and for the initial geotechnical investigation. In addition to the emission source types evaluated for the Mona-Oquirrh project, WREG determined emissions from helicopters proposed for use in both the geotechnical work and during transmission line construction. A total of 12 alternate routes were evaluated, as well as expansion of two existing substations and construction/operation of a concrete batch plant.