Plum Contracting Inc is a full service Highway and Bridge Contractor. We are headquartered east of Pittsburgh in Salem Townsh ... ip, PA. Incorporated in 1980, we are a progressive company in bridge construction. Plum Contracting has the ability to self perform bridge construction projects from start to finish with our extensive fleet of equipment and diverse workforce. Plum Contracting Inc is an Equal Opportunity Employer and committed to building leaders. read more