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The Bigfella
08-20-2008, 03:40 AM
I've been asked to do some work on artificial reefs - specifically for recreational fishing.

Do we have anyone on the forum with experience with these?

Thanks

Ian

hansp77
08-20-2008, 04:14 AM
sounds interesting Ian,
got anymore specific info?

I saw a very cool documentary a couple of years ago about a project around a tropical island somewhere (pacific maybe??),
The reefs had been devastated by various fishing methods, most of it harvesting fish and reef for marine aquariums.
The solution was basic, they welded together many different shapes and structures out of simple steel rod- and then collected live damaged bits of reef and wired it onto the structure. Within a year or so all the metal was totally white, thickened, and completely covered in mineral accretion. The bits of live rock and reef had grown into the accretion and and thousands and thousands of fish had begun living and breeding in it.
It was quite a remarkable and successful story.
The growth rate was rapid, the structures thickening up, and giving great shelter. Their fishing industry was becoming viable again.

here is a write up of something similar, using a form of electrolysis to speed up the accretion process.
http://www.globalcoral.org/Reef%20Restoration%20and%20Coastal%20Protection%20 Project.htm

The Bigfella
08-20-2008, 04:26 AM
It is interesting. I haven't got into it yet - I've just read the documentation.

This one uses steel structures too - dopped into offshore locations about 25-30 metres deep. There are already some concrete ones out there too - but they are in estuaries, rather than offshore.

I'll do some desk research later on - I've been out on the water again for the 5th day out of the last 6....

Larks
08-20-2008, 04:28 AM
Is there anything that you're after in particular? There are quite a few up here off of Darwin and I understand they keep adding to them on a reasonably regular basis, some of the recent ones being Indo' fishing boats. I can ask the fisheries guys here who has been managing the set up of them and get a few contacts for you if it might help.

cheers
Greg

paladin
08-20-2008, 04:30 AM
The ones that I have seen and dived on were made of old railroad cars, busses and trucks that had been stripped of any petroleum based products and then so arranged, with the bits of living coral attached....some used old crushed autos as building bricks.

S/V Laura Ellen
08-20-2008, 04:31 AM
Florida attempted to use piles of old tires wired together. Didn't work at all, the area was devoid of life and they ended up pull up all the tires.

The Bigfella
08-20-2008, 05:03 AM
Is there anything that you're after in particular? There are quite a few up here off of Darwin and I understand they keep adding to them on a reasonably regular basis, some of the recent ones being Indo' fishing boats. I can ask the fisheries guys here who has been managing the set up of them and get a few contacts for you if it might help.

cheers
Greg

Thanks Greg - I might give you a hoy after I've met with the guys who want the work done. My job is to get the business case together - which shouldn't be too hard.

Allan - Wiki has the story on that Florida reef (Osborne Reef) - an interesting read. What a cock-up.

Chuck - we've had a few old destroyers turned into dive sites here too.

paladin
08-20-2008, 05:13 AM
We made a reef outta an old interisland ferry...I had to dive on it a couple of times as the name of the boat was Oro Verde.......as was her cargo.....we had tracked her for some time as she was also a part time arms carrier......I hung the mine on her after she was leaving port, and her cargo kept the locals flying about 6 feet off the island for several months. A year later I went back down on her to check something.....she was sitting on the bottom in 250-270 feet of water, with an upright pepsi bottle still sitting on the captains chart table...

Rational Root
08-20-2008, 07:34 AM
70 meters down, inside a wreck.

That's going to make for some real unforgiving diving.

Back when I was Jumping I met some Saturation divers from the US Navy. Hell those guys were a little crazy even by my standards.

I asked them how deep they had been - Maybe that stuff is classified, 'cause they just said - "Deep".

Or maybe they were just sick of PADI divers asking stupid questions :eek: - "how fast's it go mister ?? Huh ? Huh ?"

Dave


We made a reef outta an old interisland ferry...I had to dive on it a couple of times as the name of the boat was Oro Verde.......as was her cargo.....we had tracked her for some time as she was also a part time arms carrier......I hung the mine on her after she was leaving port, and her cargo kept the locals flying about 6 feet off the island for several months. A year later I went back down on her to check something.....she was sitting on the bottom in 250-270 feet of water, with an upright pepsi bottle still sitting on the captains chart table...

paladin
08-20-2008, 08:23 AM
That particular boat wasn't intended to be a tooorist attraction....

Rational Root
08-20-2008, 09:51 AM
Neither was the thistlegorm... 8-0


That particular boat wasn't intended to be a tooorist attraction....

alphatopher
08-20-2008, 12:16 PM
In the deep South USA....Christmas trees are the preferred material for creating new fish hang outs. Google "lake lanier 2008 drought pictures" for a examples.

paladin
08-20-2008, 01:21 PM
Dave...how far is the Thistlegorm from Sharm el Sheik?

Gary E
08-20-2008, 01:34 PM
Texas is building them...
http://www.tpwd.state.tx.us/landwater/water/habitats/artificial_reef/


New Jersey has a LOT of them

http://www.state.nj.us/dep/fgw/artreef.htm


REEF PROGRAM INFORMATION
http://www.state.nj.us/dep/fgw/images/news_arrow.gifSubway Cars Hit Bottom on Atlantic City Reef (http://www.state.nj.us/dep/fgw/news/2008/subwaydeploy4-08.htm) - 4/22/08
http://www.state.nj.us/dep/fgw/images/news_arrow.gifDEP Reinstates Subway Cars as Approved Reef Material (http://www.state.nj.us/dep/fgw/news/2008/subwaycars.htm) - 3/13/08
http://www.state.nj.us/dep/fgw/images/news_arrow.gifTownsend Inlet Reef Site Deployment Video Clip (http://media3.state.nj.us/dep/reef_deployment1.wmv) (.wmv format)
http://www.state.nj.us/dep/fgw/images/news_arrow.gif2005 Artificial Reef Management Plan (http://www.state.nj.us/dep/fgw/pdf/2005/reefplan05.pdf) (pdf, 1.6mb)
http://www.state.nj.us/dep/fgw/images/news_arrow.gifReef Subway Car Q & A (http://www.state.nj.us/dep/fgw/pdf/2007/subwaycarsq&a.pdf) (pdf, 22k)
http://www.state.nj.us/dep/fgw/images/news_arrow.gifArtificial Reefs (http://www.epa.gov/region02/water/oceans/artfishreefs.htm) (U.S. EPA Site)

The Bigfella
08-20-2008, 08:30 PM
Lake Lanier looks like a fun place! Ouch.

Thanks Gary - some great info there

coelacanth2
08-20-2008, 09:46 PM
As Pa;adin has indicated, the fashion around here is for old light rail cars. The local newspaper did an article within the last couple of months in reference to the latest additions to one of these reefs just off shore here in Delaware. Apparently they are quite the fish attractant.
Years ago I saw an article dealing with the use of electrically charged metal frameworks to create underwater structures. Apparently, passing the appropriate direct current through a metal armature will cause the accretion of calcerous deposits. The technique was being touted as a method of quickly growing subsurface buildings.
I've never seen any follow up, but it seemed a nifty concept.

The Bigfella
08-20-2008, 09:59 PM
I've been reading one of the links off a site mentioned by Gary. It mentions that rail cars don't last very long. It also has a bit of interesting info on the damage done to sunk ships by hurricanes. Amazing just how destructive they are - even 100+' down.

http://www.gsmfc.org/pubs/SFRP/Guidelines_for_Marine_Artificial_Reef_Materials_Ja nuary_2004.pdf

seanz
08-20-2008, 10:11 PM
Yes, natural forces are amazing.For instance, you wouldn't want to sink an old frigate in Cook Strait.......that would be just silly.:o

The Bigfella
08-20-2008, 10:11 PM
Did they really?

John B
08-20-2008, 10:15 PM
course not, that would be just silly.

The Bigfella
08-20-2008, 10:24 PM
http://media.apn.co.nz/webcontent/image/jpg/14wellington.JPG

The dirty dogs - they did too.

I went through one of the NZ frigates during a major refit. Ex Royal Navy IIRC.

edit - yep - that's the one I went through. They were doing a lot of work to implement the lessons learnt in the Falklands - smoke, flying shards, etc.

John B
08-20-2008, 10:27 PM
The next one they stuck in/off deep water cove in the Bay of Islands.

Clencher
08-21-2008, 02:22 AM
The BBC are currently screening a 3 part docu series diving in the W Pacific. The first episode they were doing shakedown dives in Chuuk lagoon which is stuffed full of WW2 Japanese wrecks. Amazing how these have been colonised in the last 60 years - and I don't think the Japanese Navy had time to get the petroleum products off first!

You can see it on BBC iPlayer - well worth a look.

The Bigfella
08-21-2008, 02:28 AM
I'm fairly certain that I've got a coffee table book on the ships in that lagoon. Your post sent me looking, but all I can find is a Bob Ballard book on the Lost Ships of Guadalcanal.

Rational Root
08-21-2008, 03:09 AM
Dave...how far is the Thistlegorm from Sharm el Sheik?

About 30 miles or so.

A nice dive in slack water. But the current that can run through it will leave you flying from the descent line like a flag in a storm.