SU 9011 is a layer of hard grey soil possibly as a preparation layer for a pre-imperial road.
SU 9011 is part of one of four road layers superimposed between the first and latest phases of the Via Gabina. Bulk ceramic finds suggest a date of between between 4th and mid 1st Century BCE. The preparation consists of layer of gravel, crushed ceramic and earth.
Layer of grey silty soil.