The fort has been associated with the fourth campaign season of governor Gnaeus Julius Agricola and was founded sometime in either AD80 or 81. It encloses an area of about 3¼ acres and was oriented towards the west. The rampart was about 15 feet wide, constructed of turf fronted by a timber palisade and revetted at the back with clay. The northern defensive ditch was found to be around 10-12 feet wide but only 1½ feet deep. There was an annexe of about 1 acre attached to the eastern side of the fort. North of the gate two large pits, belonging probably to the construction phase, suggested by their contents that tile-making may have been undertaken nearby.
Two pottery fragments recovered bear the stamps of the potters ALBINVS and SVMACI, both known to have been productive during the Agricolan period, thus giving an approximate date of construction for the fort. A number of bronze asses dated to the year AD86 have been uncovered at Barochan. These coins were in almost mint condition, proving that they had been in circulation for only a short period. It would seem that the fort was occupied at least until this date or shortly thereafter before being demolished and the garrison withdrawn.