Turret 34A (Grindon West) exists as a consolidated structure, and is located in the expected position, just to the east of Sewingshields farm. It is constructed with narrow walls (approximately 0.95 metres (3 ft 1 in) thick) having a mortar core. Like some milecastles, it has unusually short wing walls (0.9 metres (2 ft 11 in) long and 0.6 metres (2 ft 0 in) deep), suggesting it was constructed late in the scheme. The cores of both the wall (at this point), and the turret's wing walls are of large whinstone blocks. There is a suggestion of a platform in the southwest corner, and the door is at the east side of the south wall. it is 1.15 metres (3 ft 9 in) in width, with a surviving (though worn and cracked) threshold stone, showing visible seating for stone jambs and pivot hole. The turret's internal dimensions are 3.9 metres (13 ft) east/west by 2.3 metres (7 ft 7 in). Outside the turret, a path consisting of small stones and amphora fragments was discovered leading to the door.[2][4][5]