At 890 feet over the Colorado River, it is the world’s highest concrete arch bridge and America’s second-highest, also known as the Hoover Dam Bypass Bridge. You can easily cross the 1,900 ...

aka the Hoover Dam Bypass Bridge. At 1,905 feet long, it's the longest single-arch bridge in North America, according to The American Society of Mechanical Engineers. Remember to literally hold ...

bridges, roads, and tunnels. The winning bid was $48,890,995. President Franklin D. Rooseveltt attends and speaks at the dedication of Boulder (Hoover) Dam. Officially declaring that the dam at ...

You'll also enjoy plenty of panoramic views and photo-ops at the Hoover Dam, including at the Mike O'Callaghan-Pat Tillman Bridge. Reviewers praise the length of the tour and applaud the guides ...