North 21st Street Bridge

North 21st Street Bridge
Location Spans Buckley Gulch, N. Fife and Oakes, Tacoma, Washington
Coordinates 47°16′3″N 122°28′11″W / 47.26750°N 122.46972°W / 47.26750; -122.46972Coordinates: 47°16′3″N 122°28′11″W / 47.26750°N 122.46972°W / 47.26750; -122.46972
Area less than one acre
Built 1910
Built by Creelman, Putnam & Healy
Architect Waddell & Harrington
Architectural style Rigid-frame girder bridge, Other
MPS Historic Bridges/Tunnels in Washington State TR
NRHP Reference # 82004280[1]
Added to NRHP July 16, 1982

The North 21st Street Bridge in Tacoma, Washington was built in 1910. It was designed by engineers Waddell & Harrington and is a continuous concrete rigid-frame girder bridge. It is significant as one of the very earliest examples of its type. It was built "almost simultaneously" with the 950 feet (290 m) Asylum Avenue Aqueduct in Knoxville, Tennessee, which was documented by Carl W. Condit to be the first continuous concrete girder bridge to be built.[2]:1-2

It has three 60 feet (18 m) reinforced concrete spans with four continuous girders. Its spans are supported by reinforced concrete columns and abutments. The bridge has "massive and over-designed" slabs (9 feet deep) and beams (from 4 to 7 feet wide, from 9 to 11 feet deep. It is 48 feet (15 m) wide to accommodate trolley tracks in the middle.[2]

It was listed on the National Register of Historic Places in 1982.[1]

See also

References

Wikimedia Commons has media related to North 21st Street Bridge.
  1. 1 2 National Park Service (2010-07-09). "National Register Information System". National Register of Historic Places. National Park Service.
  2. 1 2 Lisa Soderberg (1979). "HAER/Washington State Bridge Inventory: North 21st Street Bridge" (PDF). National Park Service. Retrieved 2016-06-10. with two photos


This article is issued from Wikipedia - version of the 11/29/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.