McCallum Bros Ltd is the leading supplier of beach replenishment sand to beach restoration projects in the Auckland region.
Changes in the coastal structures and prevailing weather conditions have lead to the depletion of sand from many popular beaches. Often, increased stormwater runoff from urbanised suburbs has resulted in the original sand being washed offshore and thus lost to the beach.
The replenishment projects have involved the establishment of artificial concrete reefs (groynes) along the beach to restrict sand movement during storm events and the diversion of stormwater outlets to the extreme ends where the discharge will not wash the sand offshore.
McCallum Bros Ltd D50 Beach Replenishment Sand is taken from deep water deposits at Pakiri and is then transferred to the affected beach via sea (from barge and excavator or pumping barge) or via road (by truck and trailer).
Where the beach profle is steep enough to allow close access by a barge replenishment sand can be delivered by offloading directly onto the beach by excavator. The replenishment sand is then distributed evenly along the beach by excavator.
McCallum Bros Ltd delivered 4,200m³ of beach replenishment sand to Torpedo Bay in from June to July 2009.
Delivery by pumping barge can be arranged for large volume deliveries to beaches which are not suited to direct access by barge and for which there is unsuitable road access or road delivery would cause unacceptable disruption to other road users.
St Heliers Beach was replenished by pumping 30,000m³ from offshore barges from May to October 2006.
Where access by road is straightforward and impact on normal traffic flows are minimal we are able to deliver sand by truck. If direct access for the trucks onto the beach is not possible delivery may be made to a suitable nearby location. The sand is then transferred to the beach by loader, then distributed along the beach by loader, digger and/or bulldozer.
McCallum Bros Ltd truck & trailer units delivered 3,760m³ by to Judges Bay for Auckland City Council over 6 days in November 2010