Yes Surf Patrol. Similar situation here.
This is an area with many small-moderate beach breaks, usually 1-3 foot (measured back of wave) and some shifting sandbars...that sort of wave.
This was my whole argument against the project to start with...why not site it in a location where there is consistant bigger swell. Why slap it in an inconsistant swell site.
Kerry Black countered & said, if it's sited 250 meters off shore in about 10-12 meters of water, with a short steep slope facing seaward, the start of the take-off area (which is only 40cm under the water at lowest astronomical tide) with any swell will stand-up & produce a good little wave. Kind of like a mini Cortes-Bank was his comment.
He commented also the profile is designed to have a very narrow ridge-line along the top of the reef, so the wave will break in a very specific profile...with not much else near the surface to use up the swell energy.
His modeling was pretty impressive. He has spend alot of time travelling the world mapping the like of pipeline, backdoor, tahiti & lots of other areas. On a slightly cynical note. The guy is quite calculating and if you look at our example - Tauranga/Mount Maunganui is New Zealands premier summer/beach holiday spot. It has a great deal of surf culture...with little real substance (i.e hot regular swell)....if you're wanting to get your reef-building business off the ground this is the spot to build your showcase for those international clients with the real cash to come & see.......
We did point out to him previous examples have been unsuccessful. One actually sank I believe, too heavy for the soft sea floor and sunk several feet into the soft material!!!! Which is why no concrete..
He is adament it'll work...his whole career & business depends on it.
NZ Girl; its made of big flat sacks (they look like big hot water bottles). They get pinned to the sea floor then sand is pumped in from a dredge above, they get layered upwards in the correct profile, just like a pallet of bricks or something. The idea is it's not an excessively hard surface if you land on it. And if it fails the bags can be cut open by divers, the sand removed & the bags lifted at little cost.
We liked that idea.
I like the idea also it'll attract all the frothing groms to a centeral spot & it'll be a mosh pit of posers....which'll divert attention from the nice waves just down the beach thanks very much:-)
www.asrltd.co.nz is the site if you want to suss out a pdf of the design.
NZ Girl; if you really have to surf Smaills only surf the northern end of the beach. Or better still...go to Blackhead. Works in Identical conditions...