limestone structures located slightly inland of the shore, measuring 129 by 119 ft at the base and 117 by 104 ft at the top. Each anchorage weighs . The Manhattan anchorage rests on a foundation of bedrock while the Brooklyn anchorage rests on clay.

The anchorages both have four anchor plates, one for each of the main cables, which are located near ground level and parallel to the ground. The anchor plates measure , with a thickness of and weigh each. Each anchor plate is connected to the respective