Ten World Engineering Feats-- Part 2: Interstates, Cable and a Dam

3.  THE INTERSTATE HIGHWAY SYSTEM

President Eisenhower  spearheaded the  passage of the Federal-Aid Highway  Act of 1956 which authorized the largest public works project in history.  The construction of 41,000 miles of expressways with controlled ramp access and no at grade intersections, just overpasses.

4.  TRANSATLANTIC CABLE

In 1854, American Cyrus West Field secured a charter to lay a telegraph cable across the Atlantic Ocean floor.  After four failed attempts, British and American ships succeeded in laying the nearly 2,000 mile cable linking Ireland and Newfoundland in 1858.

5.  HOOVER DAM

Built by over 21,000 workers, the 60 story dam is the world's largest concrete structure at the time it was dedicated in 1935.  It caused the great growth of cities like Las Vegas and Phoenix.

--CootDam