Not really a great DIY job unless your very advanced. It would be far better to hire a pro on this one. Your going to need a back hoe, special concrete saws.
You would be far better off buying a one piece bulkhead instead of trying to build retaining walls, far less likly to leak. http://www.affordableconcretecutting...-bulkhead.html
Last edited by joecaption; 04-21-2012 at 08:32 AM.