EIB

The boundary is nearly identical to the City of Aspen’s Urban Growth Boundary(UGB), but also includes Starwood and the White Horse Springs section of the McLain Flats residential areas. The Emissions Inventory Boundary (EIB) covers the residential areas within and contiguous to the Aspen city limits such as Red Mountain, Mountain Valley (on the southeastern edge of town), Highlands, Buttermilk West, the Aspen-Pitkin County Airport, the Aspen Airport Business Center, and North Forty. The EIB also extends beyond the UGB to include the electricity used to run lifts and facilities on Aspen Mountain, Aspen Highlands, and Buttermilk ski areas because the base facilities and many lifts are within the EIB. The fuel used by Aspen Skiing Company’s snowmobiles, snowcats, and other equipment also is included, as is natural gas used in its buildings and facilities (with the exception of Snowmass).