Descriptions(see attach photo) Soil backfill was performed near to a GRP pipe at swPH. The sand backfilling of the pipe had not yet been completed, leaving prominent slope towards the GRP Pipe and the newly formed track. The roller was working in conjunction with the skid steer Bobcat loader to level and flatten the ground around the Western side of the SWPH. Whilst performing a tuming maneuver the roller tumed over onto its left side. There was a minor scratch on the GRP pipe and no injures to personnel