Area less than one acre Opened 1910 Added to NRHP 16 July 1982 | Built 1910 Architecture firm Waddell & Harrington | |
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Built by Creelman, Putnam & Healy Architectural style Rigid-frame girder bridge, Other MPS Historic Bridges/Tunnels in Washington State TR Similar North 23rd Street Bridge, Murray Morgan Bridge, Greater Tacoma Conventi, YMCA Camp Orkila, Point Defiance Zoo & Aq | ||
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.
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.
It was listed on the National Register of Historic Places in 1982.