ADKO Engineering

Bridges

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Maybert Road Bridge Replacement

The historic Maybert Bridge was eligible under the National Register of Historic Places. The bridge was built in 1895 and has a rich and colorful history. The bridge connected the historical mining towns of Washington and Maybert (The town of Maybert no longer exists) and it has far exceeded its useful life. The newbridge was federally funded under the Highway Bridge Program since it has a sufficiency rating of 5 and was classified as a structurally deficient (SD) and functionally obsolete (FO). The worse rated bridge in the state of California. The historic bridge has been carefully lifted after it has been braced and salvaged and found a home in Nevada City as a pedestian bridge.

Engineer of record: ADKO Engineering,Inc.

Owner: Nevada County

Construction Manager: HDR

Hydraulics: WRECO

Geotech: Blackburn Consulting Engineers

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Devlin Road Extension Bridge

ADKO Engineering provided PS&E and construction management for the Devlin Seg E Project. Segment E project is approximately 1,100 feet in length, with a 92-foot single span precast prestressed CA Wide Flange Girder Bridge crossing Fagan Creek. The 1,000 feet roadway is supported on TDA. The bridge has three lanes, one northbound, one southbound and a center two-way left turn lane, totaling 40 feet (or 12-foot-wide lanes and 2-foot shoulder), 6 ½ foot curb, gutter and sidewalk both on the east and west sides, and 10 foot wide Class I multi-use path for pedestrian and bicycle traffic on the east side. The project includes bio retention (Water Quality) facilities, storm, sewer, recycled water and water facilities and includes, demolition of two existing buildings (hazardous material abatement on one of the buildings) and other auxiliary work.

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Oakville Cross Road Bridge Replacement

ADKO provided PS&E for the Oakville Cross Road Bridge Replacement Project. The structure improvements included replacement of a narrow bridge with a new two-lane two-span box girder bridge, a roughened channel, and the lengthening of a four-cell box culvert.