Wall Mile 15

The monument includes Hadrian's Wall and vallum and associated features between the March Burn in the east and the west side of Oatens Bank, Harlow Hill the west. This section of the Wall runs gently downhill from the March Burn to milecastle 15 before running up a steep gradient to the summit of Harlow Hill. The Wall commands wide views to the north and south along this section, but the undulating terrain to the east and west means that views are restricted in these directions. Hadrian's Wall aims for the high points throughout this section which includes the summits of Eppies Hill and Harlow Hill, unlike the vallum which takes a lower course skirting to the south of Harlow Hill. The Wall survives beneath the B6318 road throughout the whole length of this section.

The Wall survives beneath the B6318 road throughout the whole length of this section. East of Harlow Hill antiquarians including Horsley, Brand and Skinner, recorded the width of the wall as being 7 feet and 4 inches, indicating that the Wall was of narrow type.

The Wall ditch survives intermittently as an earthwork. It survives best to the west of Eppies Hill to depths of between 2m and 3m. Elsewhere the ditch is silted up and survives only as a buried feature.

Milecastle 15 is situated east of a stream on a gentle east-west slope with a restricted view to the north east. It survives as a turf-covered platform approximately 1m high over most of its area. There are robber trenches around the crest of the platform on the east, south and west sides.

There are no visible remains of turret 15a which is located 115m east of the junction between the B6318 and the minor road to Whitchester. It was located during 1931 by Hepple, although little was found. Its remains lie partly below the surface of the B6318 road.

There are no visible remains of turret 15b which is located 200m to the west of the minor road to the disused airfield at Ouston. As with turret 15a it was located during 1931 by Hepple. Its remains lie partly beneath the surface of the B6318 road.

The course of the Roman road known as the Military Way, which runs along the corridor between the Wall and the vallum linking the turrets, milecastles and forts, is not yet confirmed in this section

The vallum runs in a straight line for most of this section. West of Eppies Hill, where the Wall and vallum are within about 30m of each other, the vallum diverges from the course of the Wall and takes a lower and straighter line to the south of Harlow Hill. It survives intermittently as an upstanding earthwork. The south mound is between 0.3m and 0.4m high where extant while the north mound is between 0.4m and 0.5m. Where extant the vallum ditch varies between 1m and 1.6m deep. Elsewhere it survives as a series of silted ditches buried below the turf.