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Views of the Parks Bar Bridge on State Highway 20 crossing the Yuba River near Smartsville, Yuba County. Example of the Thomas System of pre-cast, reinforced concrete, three-hinged arch bridges. Design and method of bridge construction was patented by William M. Thomas during his association with W. S. Post in their Los Angeles engineering firm of Thomas and Post. View 17 (1994-0018). Understructure, view from south abutment showing sway bracing in foreground, columns, floor beams, deck soffit; view to north. CA-132-17 -- view 18 (1994-0019). Understructure, view of south arch abutment showing arch ribs, columns, sway bracing, floor beams, deck cantilever, railing; view to southwest. CA-132-18 -- view 19 (1994-0020). Detail, center hinge of south span arches, transverse floor beams, deck cantilever, railings; view to northwest. CA-132-19 -- view 20 (1994-0021). Detail, Pier 3, with large stone riprap showing depth of scour which has taken place since bridge was completed; view to northwest. CA-132-20 -- view 21 (1994-0022). Detail, railing, curbs and scuppers; view to northwest at south abutment. CA-132-21. Accompanied by: Parks Bar Bridge (Yuba River Bridge), California State Highway 20 spanning the Yuba River, Smarville vicinity, Yuba County, California : photographs, written historical and descriptive data. San Francisco, Calif. : Historic American Engineering Record, National Park Service, Western Region, Dept. of the Interior, 1993. Report prepared by Bonnie Wehle Parks. , 14 p. ; 28 cm. HAER No. CA-132.
Photographs. Nonprojected graphic
5 photographic prints ; 8 x 10 in. and 10 x 8 in.
Rivers--California, Northern Bridges--California--Yuba River Yuba River (Calif.)--Photographs Parks Bar Bridge (Yuba County, Calif.)--Photographs Photographic prints Aerial views
California, Northern California Yuba River Yuba River (Calif.) Parks Bar Bridge (Yuba County, Calif.)