Marquam Bridge on September 7, 2008
The Marquam Bridge is a double-deck cantilever bridge that carries Interstate 5, designed and built by the Oregon Department of Transportation at a cost of $14 million.
Marquam Bridge on September 7, 2008
The lower southbound deck opened on October 4, 1966, and the northbound upper deck opened on October 18, 1966.
Marquam Bridge on September 7, 2008
The bridge is 1,042 feet long; the center span is 440 feet long and the other two spans are each 301 feet long. The bridge has vertical clearance of 130 feet to the lower level, and the upper level is 20 feet higher. The bridge is 57 feet wide.
Marquam Bridge on August 19, 2007
It is named for Philip Augustus Marquam, an early Portland resident and real estate developer, and represented Multnomah County in the Oregon House of Representatives.
Marquam Bridge on August 19, 2007
| Bridge Type: | Double-deck Cantilever |
| Opened: | October 1966 |
| Total Length: | 1,042 feet |
| Center Span Length: | 440 feet |
| Width: | 57 feet |
| Vertical Clearance: | 130 feet |
| Construction cost: | $14 million |
| Carries: | Interstate 5 |
| Owned by: | Oregon Department of Transportation |
Marquam Bridge on August 19, 2007
Historical Photos:
Marquam Bridge construction, 1964 (Portland Auditor's Office)
Marquam Bridge on August 19, 2007
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