Mercury Bay, on the North Island of New Zealand, is a yachting destination with stunning coastal scenery and a gateway to world-class offshore fishing. Whitianga Marina recently completed an ambitious 16-month renovation and expansion project featuring SF Marina docks and walkways, and a unique, curved sea wall.
Whitianga Marina sees heavy ferry and yacht wakes and wind-generated waves, so the sea wall needed to be both durable and efficient. New Zealand-based Heron Construction Company removed an existing rock sea wall and replaced it with a 256m L x 2m W arcing fixed breakwater with public walkway that terminates in a distinct curved end. With walls that include a decorative cast motif, it’s an example of how one of SF Marina’s licensed manufacturers can create custom structures that are not only practical but beautiful as well.
Just inside the breakwater is the 239m L x 2m W dock walkway. It was built using SF Marina type 1120 floating concrete pontoons with angled ends to mirror the breakwater’s curve. The docks provide unprecedented stability and strength and include integrated utility ducts for power and water. Virtually unsinkable, they’re moored with external piles to accommodate the moderate 2.5m tidal fluctuation. The 16 fingers are each 1.5m W, range from 17.5m to 19.5m L and are comprised of type 1515 pontoons.
The project’s floating components were manufactured at the Whangarei, New Zealand SF Marina facility. They were shipped to Whitianga Marina on a Heron Construction Company barge. Removal of the old rock seawall, dredging and installation all took place while the marina continued daily operations.
Whitianga Marina can accommodate 231 vessels ranging in length from 10 to 24 meters. A certified Clean Marina, it is a member of the New Zealand Marina Operators Association.
Its website is www.destinationwhitianga.co.nz