Weir Gate - MRP Hydro Station


Industrial Site Services was contracted by Mighty River Power to raise their 12 ton, 30 metre long weir gate from its submerged operational position to an above-water position for structural repair. This was the first time this gate had been lifted by means other than hydraulic arms, so ISS had to install many temporary anchor points. The gate was monitored using load cells to ensure both ends were lifted with the same weight to avoid twisting the gate.


  • Rigging equipment supply, including 10-ton chain blocks
  • Rigging and rope access labour supply
  • Confined space entry monitoring
  • Confined space rescue plan and equipment


  • This project won the “Together Safe” award
  • Industrial Site Services scope extended to also supply confined space resources
  • It was the first time the gate had been lifted for maintenance
  • Per project planning and methodologies
  • Tight shutdown window for the project
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