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Recent News. Account Login. The History behind the Eisenhower Tunnel 1 The tunnel was built 46 years ago on March 8, 2 It was started on March 15 in and took 5 years to complete almost exactly.
She fought for equal rights to work in the industry and started a turning point for women in engineering. The exhaust and supply air ducts are above a suspended porcelain enamel panel ceiling, and a drainage system is provided underneath the roadway surface. Today, the driver sees only the distance vertical clearance from the roadway surface to the ceilings in the tunnels—a distance of 16 feet, 4 inches.
However, because of a series of variable message boards mounted from the ceiling, actual clearance is set at 13 feet, 11 inches. The width in both bores provides two traffic lanes of 13 feet each, providing a total travel width of 26 feet. Tunnel maintenance personnel utilize a walkway that runs adjacent to the vehicle travel lanes. The walkway also provides access between the westbound or eastbound tunnels through three cross passageways, which are spaced at 2,foot intervals.
At the height of construction, more than 1, persons were employed in three shifts, 24 hours a day, six days a week. The Edwin C. Johnson Memorial Tunnel, named for the Colorado legislator, lieutenant governor, governor, and U. Senator, required more than workers. Just under of those workers were employed in actual drilling operations.
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