Lock Hessigheim

Finally afloat again

In 2010, a girder drifting in the Neckar damaged the left chamber of the double lock that had been in operation for over 50 years. Due to their age-related structural condition, the Office for Neckar Development had the upstream and downstream gates replaced with standard mitre gates, and in addition replaced the mechanical technology.

KREBS+KIEFER was involved with the planning of the necessary changes to the solid construction right through from the outline planning to the tender planning and execution planning. Amongst other things, the gate stops and the drive pits has to be adapted for the installation of the new gates. In order to bring the stability of the structure to the relevant technical level, the engineers planned to insert reinforcement bars into the existing downstream gate. They were placed in vertical boreholes and sealed. The powerhouses and operating building had to be converted to and partially rebuilt for the modern electrical technology. All this was carried out under extremely cramped conditions; in addition, the right-hand chamber had to remain operational for shipping traffic for the entire time. KREBS+KIEFER was also involved in the planning of new cable channels and a cable culvert on the upstream gate.


  • Design planning and structural engineering, solid construction and flashing, steel construction
  • Outline planning
  • Tender planning
  • Execution planning