The US Army Corps of Engineers, Baltimore District, is required to perform required Aspen Truck Model Aspen B-32 or equivalent, with basket and a qualified operator to facilitate the inspection of the... The US Army Corps of Engineers, Baltimore District, is required to perform required Aspen Truck Model Aspen B-32 or equivalent, with basket and a qualified operator to facilitate the inspection of the below listed bridge. Mobilization, demobilization, travel, and all other expenses related to this service are to be included in the cost of this procurement.