Wierda Bridge – cnr Old Johannesburg Rd and Wierda Rd, Eldoraigne – The bridge crosses the Six Miles Spruit. It takes its name from Sytze Wierda, architect and Chief of Public Works of the ZAR. Built in 1891 the contractor was JJ Kirkness. This steel bridge was erected and was made by the Actiengesellschaft fur Eisenindustrie und Bruckenbau of Duisberg in Germany. Imported by the firm Harkort of Duisberg. Proclaimed a National Monument on 10 December 1965.