1. Patuxent Engineering Group 5741 Main St, Elkridge, MD 21075 Coordinate: 39.21619,-76.70854 Phone: (410) 796-8130
2. Structural Preservtn 6955 San Tomas Rd, Elkridge, MD 21075 Coordinate: 39.18488,-76.74798 Phone: (410) 796-5000