Hadrian's Wall and vallum from East Town House, Heddon-on-the-Wall to the A69 trunk road in Wall mile 12

Hadrian's Wall and vallum from East Town House, Heddon-on-the-Wall to the A69 trunk road in Wall mile 12. Scheduling revised on 14th July 1997, new national monument number 26038.
The monument includes a section of Hadrian's Wall, its external ditch and the vallum from Heddon-on-the-Wall in the east to the A69 trunk road in the west. This section of the Wall corridor has wide views overlooking the Tyne valley to the south and east, whereas to the north and west the ground rises gently giving a less extensive view.
The Wall survives as a buried feature for the whole of this section of its course. It lies beneath the B6318 road except at the west end of this section where it continues in a field up to the A69 trunk road. The Wall ditch survives as an earthwork for much of this section, to a maximum depth of 1.5m. The upcast counterscarp, usually known as the 'glacis', also survives up to 0.3m high in the area from north of the Three Tuns Inn to the north of North Lodge.
Turret 12a (NZ 16 NW 4) and Turret 12b (NZ 16 NW 5) survive as buried features below the B6318 road. Their locations are known from excavation by Simpson in 1930. The exact location of Milecastle 12 (NZ 16 NW 3) has not yet been confirmed.
The vallum survives intermittently as an upstanding earthwork throughout this section. The mounds have been reduced by ploughing and the central ditch has silted up for most of its length. The south mound in this section reaches a maximum height of 1.5m, while the ditch has a maximum depth of 0.6m
The course of the Roman road known as the Military Way, which ran along the corridor between the Wall and the vallum linking the turrets, milecastles and forts, has not yet been confirmed in this section of the corridor.
Hadrian's Wall and vallum and their associated features between East Town House, Heddon-on-the-Wall and the A69 survive well as a series of buried and upstanding features. Significant information on the development of the frontier system over time will be preserved. (1)
A watching brief was maintained during excavation of a pipe trench, for water main renewal, across the projected line of the vallum in Heddon-on-the-Wall, between NZ 13306697 and NZ 23086698. The excavation exposed bedrock throughout its length and no archaeological features. Absence of features is thought likely to be due to truncation by the development of the village of Heddon-on-the-Wall. (2)
An evaluation on a disused section of the B6318 west of Heddon (NZ 12406725) revealed the foundations of Hadrian's Wall. They comprised a single layer of sandstone blocks less than 0.4m below the modern road surface. The blocks were the southern face of the Wall which had a clay bonded core of smaller angular stones. There were layers of clay above and below the Wall. On top of the Wall were 18th, 19th and 20th century road surfaces. There were no built up deposits on top of the Wall, which suggests it had been cleaned or reduced to a single course before either the 18th century or modern road was built. (3)(4)