Horizontal strategies continued in 1976 in which the excavators ultimately removed deposits until reaching bedrock.
While their column footings reached bedrock, a foundation wall had to be built around them to resist the tremendous inward pressure from the riverside soil.
The holes will reach bedrock, 4 to 10 feet below the lowermost level of the memorial.
The drill became more and more unwieldy as it failed to reach bedrock.
On July 26, 2010, drilling reached bedrock at 2537.36 m.
In Battery Park City, which was built over fill, piles are driven about 100 feet to reach bedrock to support the foundation.
The southern foundation pier was sunk to 233 feet below high water before reaching bedrock, only 8 inches short of a world record.
In certain spots, workers have reached bedrock, and the end of the work is now set for June, months earlier than many had predicted.
The unfolded landing pads sank into the ground until they reached bedrock.
Their roots reach bedrock and they stay as they are, content.