Two large RC concrete box culverts, buried underneath the Dhoho Kediri airport runway embankment, will serve as the main infrastructure facilitating diversion of two main crossing rivers. Routing layout of the box culverts Bravo and Charlie – intersecting the runway, are shown in figure below. The soil embankment height above the box culverts ranges from 0.6 to 2.5 meters above Bravo and 17 – 24 meters above Charlie. The dimensions of box culvert Bravo is 11 meters wide x 7.3 meters deep x 575 meters long, while dimensions for Charlie is 15.9 meters wide x 6.8meters deep x 422 meters long.
Davy Sukamta and Partners performed value engineering for the box culvert design, previously designed by international consulting firm and Davy Sukamta and Partners managed to save construction cost around 101 billion Rupiahs. Construction of both box culverts is targeted to be completed by the end of 2021.