Lewiston-based Musselman Construction Co., a heavy equipment dealer that does business here as Musselman Rentals & Sales, is constructing a 23,000-square-foot sales and service building at 24201 East Knox Lane, in east Liberty Lake. Edwards Smith Construction LLC, of Coeur d'Alene, is the contractor on the $1.4 million project, and Architects West Inc., of Coeur d'Alene, designed it.