 It spans about 97.6 metres (320 feet), rises 25.6 metres (84 feet) above the abutments to a height of around 43 metres (142 feet) over the gully.The bridge is listed by Heritage New Zealand and on the IPENZ Engineering Heritage Register.In a 2006 poll of 600 alumni of the University of Auckland School of Engineering, the bridge was third in the list of New Zealand engineering achievements, after Manapouri Power Station and "Black Magic".