A rescue excavation was undertaken during work on the construction of the railway line running north-west of Vesuvius – Lot B 2, which crosses the territories of S. Anastasia and Somma Vesuviana (NA), along a stretch circa 900 m in length and 25 m wide. The excavation revealed an ancient ground level buried by the eruption of 79 A.D. with evidence of agricultural activity: a system of rectilinear parallel irrigation channels, circa 0.70 m apart (each being an average of 0.70/0.80 m wide and circa 0.20 m deep), and a larger channel 2.50 m wide. These alternated with parcels of land with cultivation ditches also arranged in a regular manner. Almost rectangular in shape, 1.30 m long, 0.30 m wide and circa 0.45 m deep, with distanced between 1.30 m and 1.60 m, they attest the intense agricultural exploitation of the terrain, perhaps for growing shrubs, between the 1st century B.C. and the 1st century A.D.