River & Stream Works
Wharemauku Erosion Protection
Project Overview: The contracted works comprises clearing of worksite, excavations, backfilling, supply & placing of Rip Rap, formation of rock riffle and living walls, supply and installation of “Filtrex” Filtersox involved in the realignment and armouring of the Wharemauku Stream. 1340 tonnes of rock imported and placed. Very confined work areas. Swamp pads were used for stream crossings. Fencing was done to protect a cabbage tree. Kingfisher borrows had to be looked out for and notified. Fish passage had to be maintained.
Earthworks & Associated Works
Vegetation removal
Strip & stockpile topsoil for reuse
Construct temporary access to site and reinstate on completion
Excavate to waste
Rock Riffles
Excavate 750 deep
Place riprap and key in anchor rocks
Place & interlock rocks and fill voids with small rocks and fines
Stream diverted around works wherever possible. Sometimes work had to be done in the live stream due to confined work areas.
