Turret 10A (Throckley East) is located 509 yards (465 m) west of Milecastle 10. The turret lies beneath the modern Hexham Road (B6528) and there are no visible surface remains but has been excavated in 1930 and 1980.[9] The 1930 excavation could only examine the south-east corner of the turret. It discovered that the walls were approximately 3 feet (0.91 m) thick and stood five courses of stone high.[9] The entrance to the turret was located in the south wall. The 1980 excavation, carried out before some nearby construction work, was more extensive and discovered just two distinct occupation layers within the turret.[9]