20th Avenue NE Bridge
20th Avenue NE Bridge | |
|---|---|
 | |
| Coordinates | 47°40′19″N 122°18′21″W / 47.6719°N 122.3058°W |
| Other name | Ravenna Park Bridge |
| Characteristics | |
| Design | Deck Arch |
| Material | Steel |
| Total length | 354 feet (108 m) |
| Width | 23 feet (7.0 m) |
| Height | 41.5 feet (12.6 m) |
| Longest span | 250 feet (76 m) |
| History | |
| Designer | Frank M. Johnson |
Engineering design by | Arthur Dimock |
| Construction cost | $55,000 |
| Opened | 1913 |
| Closed | 1975 (to vehicles only) |
Ravenna Park Bridge | |
| Location | Seattle, Washington |
| Built | 1913 |
| Architect | Frank M. Johnson and J.R. Wood & Co. |
| MPS | Historic Bridges/Tunnels in Washington State TR |
| NRHP reference No. | 82004246 |
| Significant dates | |
| Added to NRHP | July 16, 1982 |
| Designated SEATL | January 17, 1977[1] |
| Location | |
Interactive map of 20th Avenue NE Bridge | |
The 20th Avenue NE Bridge (also known as the Ravenna Park Bridge) is a three-hinged, steel, lattice-arched bridge that spans a ravine in Seattle, Washington, United States' Ravenna Park. It was designed by Frank M. Johnson under the direction of city engineer Arthur Dimock.[2] Built in 1913, the structure is both listed in the National Register of Historic Places[3] and is a designated city landmark.[4][5]
The structure is 354 ft (108 m) long. It has a 250 ft (76 m) arch with a rise of 41.5 ft (12.6 m) from its footings as the ravine floor drops further below. It supports an 18 ft (5.5 m) reinforced concrete roadway and a 5 ft (1.5 m) sidewalk.[6] Beginning on March 11, 1975, a four-month trial began wherein the bridge was closed to vehicular traffic. The bridge did not meet the standards for arterial roads at the time, and upgrading the bridge would have been cost prohibitive.[7] The trial period was successful and the bridge has been closed to vehicle travel ever since,[8] but it is accessible by pedestrians and cyclists.[2]
The newly constructed 20th Avenue NE Bridge (now known as Ravenna Park Bridge), Seattle, Washington, U.S., 1914. Originally a bridge for automobiles, it was eventually pedestrianized..JPG)
A person rides a bike over the 20th Avenue NE Bridge.
References
- ↑ "Seattle Ordinance No. 106143: designating as a Landmark the 20th Avenue Northeast Bridge)" (PDF). Seattle City Council. City of Seattle. January 17, 1977. Retrieved July 17, 2026.
- 1 2 Long, Priscilla (July 23, 2008). "Seattle's Ravenna Park Bridge is constructed in 1913.". HistoryLink.org Online Encyclopedia of Washington State History. Archived from the original on October 3, 2011. Retrieved March 24, 2011.
- ↑ National Register of Historic Places; Annual Listing of Historic Properties (Part II) (PDF). National Park Service. March 1, 1983. p. 8669. Archived from the original (PDF) on November 3, 2011. Retrieved March 25, 2011.
- ↑ "Seattle Landmarks List". Seattle Department of Neighborhoods, City Landmarks. City of Seattle. (p.2, alphabetized under "20th"). Retrieved July 17, 2026.
- ↑ "Individual Landmarks". City of Seattle Department of Neighborhoods. (bottom of list, alphabetized under "Twenty"). Archived from the original on June 4, 2010. Retrieved March 25, 2011.
- ↑ Corley, M (October 8, 1976). "Seattle Historic Building Data Sheet: Ravenna Park Bridge (20th N. E. Bridge)" (PDF). Seattle Department of Neighborhoods, City Landmarks. City of Seattle. Retrieved July 17, 2026.
- ↑ "Ravenna Span Closing to Cars". Seattle Post-Intelligencer. March 10, 1975.
- ↑ "Old bridge being fixed". Seattle Daily Times. January 12, 1977.
- Bridges in Seattle
- Bridges completed in 1913
- Road bridges on the National Register of Historic Places in Washington (state)
- National Register of Historic Places in Seattle
- Pedestrian bridges in Washington (state)
- Former road bridges in the United States
- 1913 establishments in Washington (state)
- Open-spandrel deck arch bridges in the United States
- Steel bridges in the United States