. Concrete bridges and culverts, for both railroads and highways . spanopenings over spandrels and abutments is 12 feet,and the thickness of the skewback piers is 2 are five latticed steel ]\Ielan arch ribs in theconcrete. It was built by William S. Hewitt & Co.,of Minneapolis. George L. Wilson was consultingengineer. Boulder-Faced Bridge, a park at Washington. D. C, there is a boulder-faced arch of rustic design made to conform withthe surroundings. It has a span of 80 feet, a riseof 15 feet, and a clear width of roadway betweenparapets of 23 feet. The entire arch rin
. Concrete bridges and culverts, for both railroads and highways . spanopenings over spandrels and abutments is 12 feet,and the thickness of the skewback piers is 2 are five latticed steel ]\Ielan arch ribs in theconcrete. It was built by William S. Hewitt & Co.,of Minneapolis. George L. Wilson was consultingengineer. Boulder-Faced Bridge, a park at Washington. D. C, there is a boulder-faced arch of rustic design made to conform withthe surroundings. It has a span of 80 feet, a riseof 15 feet, and a clear width of roadway betweenparapets of 23 feet. The entire arch ring is built ofconcrete, but the soffit is darkened with lampblackto harmonize with the boulder facing. The bouldersof the arch ring extend down below the soffit sev-eral inches, and partly obscure the concrete archsoffit. It was built in 1901 at a cost of $17,500.\V. J. Douglas, Engineer. Grand Rapids Arch Bridge. This is a good example of the best Americanpractice in reinforced concrete arch bridge has five spans, the center one being 87 feet, the.
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