The asset portfolio of a province in the south of The Netherlands consists of concrete civil works (like bridges, viaducts, divers, underpasses and tunnels) and are important links in their road and water networks. These post-war constructions are built based on over time changing design principals and degrading leaving the province with a key question: what is the residual lifetime of their assets? Given the over time chaning desing principals and environmental and mechanical loading, designed lifetime is a untrustworthy indicator.


Due to changed legislation, all public entities are obliged to put their asset portfolio on their balance sheet, amortise them annually and create provisions to fund replacements. In order to be able to do so, insight in a reliable residual lifetime of these civil works is crucial.


  • Selection of a representative pilot scope of civiel structures that allow extrapolation to portfolio scope
  • Risk-based modelling of residual lifetime, using actual technical conditions
  • Extrapolation of residual lifetime of pilot scope to portfolio scope
  • Determine replacement cost
  • In depth analyses of financial provisions to be made based on the residual lifetime, resulting in a CAPEX planning till 2067


  • Reliable condition-based modelling of residual lifetime of civil structures, supporting risk-informed decisions
  • Validated current book value, necessary annual ammortisation and provision building for today and the future

This case study was performed with Simeo™