Opening hours of Road construction company in Middleback Range, South Australia Opening hours of Road construction company in Middleback Range, South Australia Home / South Australia / Middleback Range / Road construction company Road construction company Boral Asphalt Iron Knob Rd, Middleback Range SA 5600, Middleback Range, South Australia 5600 (08) 8297 7346 Categories of local businesses in Middleback Range Asphalt contractor Car racing track Paving contractor Paving materials supplier Racecourse Road construction company