Along the large main waterways in Eastern Norway, comprehensive flood safety systems for protection of the infrastructure, the settlement and the agricultural land were established in the period from 1960 to 2005. The systems are currently protecting major social values, but the Norwegian Water Resources and Energy Directorate (NVE) is lacking an overview of the conditions on most of them. The systems' age call for systematic inspections, in order to present a foundation for more extensive maintenance and potential upgrades.