A 'triple dyke' was discovered and recorded by Mr R.J. Martin, the acting clerk of works, during the building in 1955 of the Colchester County High School for Girls in Norman Way. A plan was made, indicating three parallel ditches aligned NW to SE, but no sections were drawn.<1>

'As exposed on the surface they were on average 13 ft (4.0m) wide and as a group 84 ft (25.5m) across, 41 ft (12.5m) less than the Triple Dyke to the west. A small quantity of 2nd-century pottery was found on the site but since this was mainly in the spoil-heaps, none need have come from the ditches. At
the south end of the site (Points A and B, Fig 6.16), post holes were observed in section. These were about 6 inches (0.15m) across, 18 inches (0.45m) deep and about 18 inches apart centre to centre. Hull wrote 'about 18 inches outside the end of their line there was a small ditch. The appearance presented was that of a building with wooden posts surrounded by a diagonal ditch. The pottery was again 2nd century' (MS Colchester outside the walls' in CM). At Points C and D (Fig 6.16) was found a 2nd-century pit up to 14 ft (4.3m) deep. The structural remains may be associated with those subsequently found nearby by John Wacher.'<1>

A trial trenched evaluation (ECC3801) on the project line of the triple dyke did not define any evidence for the monument.<2>