The fortlet was rectangular, with sides of by , and covered . It was originally thought to be surrounded by a single Punic ditch but investigation revealed there to be two Punic ditches separated by a wide berm. The inner ditch was wide and deep while the outer ditch was wide and deep. A Punic ditch is a defensive v-shaped ditch with one side much steeper than the other; the ditches surrounding the fortlet had an outer face at 27 degrees and the inner face at 69 degrees. The rampart behind the ditches only survives to at its highest point. It was built from turf on top of sandy clay with a rubble foundation. The fortlet ramparts to the south lay on top of the slighted fort ramparts. Whether corner towers were a feature of the fortlet is unknown, no evidence remains aside from a single posthole, although only the north and east corners survive in good condition. There were two gateways, one to the north and one to the south.