According to Alemi and Stevenson, in models of the early solar system it is nearly impossible for Venus to avoid a big hit. Most likely, Venus was slammed early on and gained a moon from the resulting debris.
The Golden Gate Bridge was built simply, to connect San Francisco to Marin County. The San Francisco Bay has rough currents and ferries were the only way to get across. Building a bridge just made it easier.
Other figures: Height: 746 feet; Width: 90 feet; Clearance underneath: 220 feet at mean high water. The Golden Gate Bridge was opened to vehicular traffic on May 28, 1937 at twelve o'clock noon...over 70 years old. The Golden Gate Bridge took more than four years for construction at a cost of $35 million.