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  #1  
Old 11-18-2002
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grumol is on a distinguished road
Do-it-Yourself mooring

i have a problem -- we live on an isolated part of the st. lawrence river, just before it meets Lake Ontario -- reportedly a mud/weed/rock bottom -- i need to do a mooring in 15'' of water, and can''t get any commercial outfits to come out here and do the job -- so i''m considering doing it myself -- i propose to do as described in Chapman''s, put in 3 anchors, (danforth, plough?)connected by bridle chain, then single chain rising to buoy -- my ancient Chapman''s claims this is more secure than a heavy mushroom -- is this nuts?? -- its an Alberg 22 for now, but may eventually be home to a 30 -- bob
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Old 11-19-2002
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Do-it-Yourself mooring

Depends on how long of rode you can get away with. You still need length to keep the pull angle down. If you want a simple mooring for mud get a big innertube. float the innertube. Put a big washtub inside the innertube. Fill the washtub with concrete--don''t forget to put in a substantial eye to hood the chain to. Let this setup. carefully float it out to where you want the mooring, put some holes in the innertube and let it sink. TAAA---DAAA Instand heavy mooring. It will sink into the mud fairly quickly making it nearly impossible to get up. Cheaper than buying 3 large anchors.
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Old 11-20-2002
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Do-it-Yourself mooring

very interesting -- i just happen to have a large inner tube -- thanks
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Old 11-21-2002
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Do-it-Yourself mooring

Bob:

First of all, even the larger standard anchors are not constructed to last for extended periods under water.

I’d be willing to bet that if you got a 55 gallon drum and took it down to a cement mixing company, they could put around 500 lbs. (dry weight) of foundation mix in it pretty cheep. Otherwise, you’ll need to use mortar mix and extra portland cement to mix your self a batch that will hold up under water. Either way, you’ll need the drum and lots of re-bar to stick through the links of the chain to hold it in the cement. I’d use 4 feet of at least 1-inch chain for this. You can put a couple of cement blocks, holes up, in the barrel to hold the re-bar level and the chain centered during the pour. Be sure to take a stick and work out any air gaps. This will need to sit for a week or so to thoroughly cure before it goes in the water.

Next step is to get it onto a pick-up truck and down to a launching ramp. Roll it off the back and attach the rest of the gear. I hope you have enough tide for this next step but if not, where there’s a will, there’s a way. A good stout skiff will easily handle the weight. Lash the block around the girth of the skiff with a sacrificial piece of ½-inch nylon and let the tide come up and float it off. If you don’t have much tide in your area, it may require a bit of swimming, pushing and cursing to get the thing hanging under the skiff but, it can be done!

I would recommend towing the skiff out to the mooring spot instead of riding in it because it may be safer to cut the line from a different boat.

My “rule-of-thumb” for the chain is to use at least ¾-inch bottom chain and ½-inch top chain regardless of boat size below say, 45 feet. It’s not the tinsel strength that’s important here but the ability of the chain to hold up against the corrosive action of the water. The shackles are the size of the larger chain in the connection. The length of the bottom chain is equal to the water depth at low tide and the top chain length is equal to the depth at high tide. I advocate using a “pass-through” style mooring ball and if you do this, add 1-foot of chain. Then come the rubber bumpers placed on top of the ball so the top shackle doesn’t damage it, and the top shackle is the largest one that will fit. Through the top shackle is the swivel and then my pennants to that. Good luck!
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Old 11-21-2002
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Do-it-Yourself mooring

I recently watched a 50'' Gulfstar move a 4'' by 4'' cement block mooring with it''s engine alone. He was reposistioning it since the last boat there had dragged it. Cement become more bouyant under water than above. You really need mushroom or similar burying type of mooring anchor. A 200# mushroom will give you far more holding than a 500# block of cement and be far easier to handle.
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Old 11-21-2002
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Do-it-Yourself mooring

WA State Marine Parks use 2,000lbs. of concrete connected with about 10ft. of chain to a 500lb. block of concrete. The 500lb. block is intended to lift to cushion extreme strain.
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