Hawthorne Bridge
| Hawthorne Bridge | |
|---|---|
_from_southwest,_2012.jpg) |
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| Carries | Vehicles, pedestrians, cyclists |
| Crosses | Willamette River |
| Locale | Portland, Oregon |
| Maintained by | Multnomah County |
| Characteristics | |
| Design | Parker truss with a vertical-lift span |
| Material | Steel |
| Total length | 1,382 feet (421 m) |
| Width | 73 feet (22 m) |
| Longest span | 244 feet (74 m) |
| No. of spans | 6 (excluding concrete girder approach spans) |
| Piers in water | 6 |
| Clearance below | 49 feet (15 m) closed, 159 feet (48 m) open |
| History | |
| Opened | December 19, 1910 |
| Statistics | |
| Daily traffic |
30,000 |
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Hawthorne Bridge
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Portland Historic Landmark
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| Location | Portland, Oregon; Willamette River at river mile 13.1 |
| Coordinates | 45°30′48″N 122°40′15″W / 45.513204°N 122.670937°WCoordinates: 45°30′48″N 122°40′15″W / 45.513204°N 122.670937°W |
| Built | 1910 |
| Architect | Waddell & Harrington |
| MPS | Willamette River Highway Bridges of Portland, Oregon |
| NRHP Reference # | 12000932 |
| Added to NRHP | November 14, 2012 |
30,000
The Hawthorne Bridge is a truss bridge with a vertical lift that spans the Willamette River in Portland, Oregon, joining Hawthorne Boulevard and Madison Street. It is the oldest vertical-lift bridge in operation in the United States and the oldest highway bridge in Portland. It is also the busiest bicycle and transit bridge in Oregon, with over 8,000 cyclists and 800 TriMet buses (carrying about 17,400 riders) daily. It was added to the National Register of Historic Places in November 2012.
The bridge consists of five fixed spans and one 244-foot (74 m)-long vertical-lift span. It is 1,382 feet (421 m) in total length. The bridge was originally 63 feet (19 m) wide, including two five-foot sidewalks, but the sidewalks were widened to 10 feet in 1998, increasing the structure's overall width to 73 feet (22 m). The 880,000-pound (400,000 kg) counterweights are suspended from the two 165-foot (50 m)-tall towers. While the river is at low level, the bridge is 49 feet (15 m) above the water, causing it to be raised an average of 200 times per month. As of 2001, the average daily traffic was 30,500 vehicles. The bridge was designed by Waddell & Harrington, which also designed the Steel and Interstate bridges.John Alexander Low Waddell invented the modern-day vertical-lift bridge.
The current bridge was built to replace the second Madison Street Bridge, a wooden bridge built in 1900. It cost $511,000 to build and was opened on December 19, 1910. Hawthorne Boulevard (and thus the bridge) was named after Dr. J.C. Hawthorne, the cofounder of Oregon's first mental hospital and early proponent for the first Morrison Bridge.
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