Upgrading of three historic arch bridges over the Orange River near Keimoes, South Africa

Due to the current single lane configuration and limited flood capacity of two of the bridges, the overall objective of the construction project is to increase the capacity and improve the safety of this route. The extent of the widening of the three arch bridges are significant and requires an additional overall bridge width of 8.7 m to obtain the proposed width of 12.4 m. This paper reviews the key planning, design and construction aspects that were considered for this project.