{"id":6859,"date":"2023-01-01T12:05:30","date_gmt":"2023-01-01T12:05:30","guid":{"rendered":"https:\/\/www.systra.com\/ibt\/?post_type=projects&p=6859"},"modified":"2026-04-17T21:05:18","modified_gmt":"2026-04-17T21:05:18","slug":"mosquito-road-bridge-el-dorado-county-california","status":"publish","type":"projects","link":"https:\/\/www.systra.com\/ibt\/project\/mosquito-road-bridge-el-dorado-county-california\/","title":{"rendered":"Mosquito Road Bridge – El Dorado County, California"},"content":{"rendered":"\n
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Technical details<\/div>\n \t
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Customer<\/div>\n\t
El Dorado County<\/div>\n\t <\/div>\n
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Dates<\/div>\n

In progress<\/p>\n<\/div>\n <\/div>\n

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Localisation<\/div>\n
El Dorado County, California<\/div>\n <\/div>\n
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Partners<\/div>\n
Bridge Design Consultant: Quincy Engineering, Inc.<\/div>\n <\/div>\n
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Activity<\/div>\n
SYSTRA IBT's Role: Bridge Design Consultant for the concept and detailed design. Engineer of Record.<\/div>\n <\/div>\n \n \n <\/div>\n\n\n\n
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DESIGN-BUILD<\/h2>\n\n\n\n

Main Span: <\/strong>536 ft (163.4 m) with 322 ft (98.2 m) end spans.<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n

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The Mosquito Road Bridge spanning the South Fork of the American River replaces a one-lane timber suspension bridge built in 1939. <\/strong><\/p>\n\n\n\n

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The three-span post-tensioned concrete box girder bridge has a 536 ft (163.4 m) main span with 322 ft (98.2 m) end spans. The bridge, which is constructed using the cast-in-place balanced cantilever segmental method, varies in depth from 12 ft (3.66 m) to 30 ft (9.15 m) and is supported by two hollow main piers consisting of 5 ft (1.52 m) confined corner octagons joined by 2 ft (0.61 m) wide walls. The columns rise nearly 200 ft (61 m) above the CIDH-supported footings, and the roadway reaches heights of approximately 375 ft (114 m) above the river.<\/p>\n\n\n\n

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SYSTRA IBT is responsible for detailed design and construction engineering, providing technical oversight, developing structural modeling, and reviewing design calculations and construction drawings. Engineer of Record.<\/p>\n\n\n\n

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Featured Project<\/h2>\n
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