Completed in 1881 as part of the first stage of the Adelaide-Nairne Railway (which formally opened in 1883), the tunnel was replaced by a bridge in 1928.
Six workers were killed when an estimated 150 tons (136 metric tonnes) of earth fell onto the tunnel site during heavy afternoon rains.
[4][5] All tunnels built along the Adelaide and Nairne Railway in the early 1880s were of the same specification being 16'6" (5.03m) high and 15' (4.57m) wide.
[6] The tunnel was lined with bricks that were made from clay excavated from an adjoining quarry and nearby railway cuttings, and fired at brickworks immediately south of the No.
3 Tunnel in Eden Hills[7] Media related to Pinera railway station at Wikimedia Commons