City of Aspen building department officials reported smooth sailing Tuesday for a 50-foot-deep double-basement excavation that is part of a residential construction project, but the effort could be ...

ASPEN, Colo. (AP) - City officials say a 50-foot-deep double-basement excavation in Aspen is going well, but it could be the last of its kind. The Aspen Daily News reports that the City Council last ...

Deep basements are becoming quite common in central business districts, downtown and prime high-rise developments where the land area is limited and costly. It is also common in cities which have ...