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Major works included:

  • Design of temporary works and the installation of a sheet piled cofferdam and dewatering to control the water from the lake and river.

  • Demolition of all the existing infrastructure.

  • Excavation and subgrade improvements including 8m timber piles with concrete slab foundations.

  • The new inlet structure comprised of a precast wing-wall installed onto a new concrete slab which was founded on timber piles.

  • The new outlet structure comprised of precast concrete walls placed onto a concrete slab foundation. The panels were tied in with a concrete floor and in-situ stitch joints.

  • The installation of a new 1200mm PE culvert.

  • The removal and replacement of all mechanical componentry with the installation of a new flap gate.

  • Site reinstatement which included retaining walls, timber fences, metal access tracks and grassing.

This project was completed in May 2018.

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