Instead of resting on the bottom like a crib dock, pile driven docks are driven into the ground using an excavator-mounted pile driver. As a rough guide, a piling should be sunk into the bottom at least 12 to 15 feet. The distance between pilings is generally 10 to 15 feet. As with crib docks, ice is the main enemy of the pile driven dock. Ice can form around the pile and can be forced up or down, depending on changes in water height. Northeast Dock and Barge can repair this kind of damage, as well as install new pile driven docks.