Physical Description and Analysis: The Mangaturuturu Viaduct is a truss viaduct consisting of two 98-foot (30 m) Warren trusses with lateral bracing at the ends of the stringers and end struts. These superstructures are predominantly constructed of steel, but feature an 18-meter (60-foot) high central mass concrete pier, as well as two smaller concrete piers on the sides and massive concrete piers. The viaduct is a planar structure spanning the Mangaturuturu River gorge in a straight line. There have been several modifications to the viaduct's structure and appearance. The first was the reinforcement project in the late 1920s, which strengthened the bridges. Other additions include the construction of the electrification pylon and parapet in the late 1980s, and the straightening of the floor beams in 2005. The rail support membranes, installed in 1987, had to be replaced around 2008 because they caused the rail supports to crack.