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Floradale Avenue Bridge over the Santa Ynez River

Lompoc, CA

The Floradale Avenue Bridge consists of the replacement of an existing box girder bridge due to scour and seismic vulnerabilities that were identified as part of the 2006 Local Bridge Seismic Retrofit program. The Floradale Avenue corridor is a major collector serving over 7,000 vehicles per day traveling to and from Lompoc from Vandenberg Air Force Base (VAFB), the adjacent Federal Correctional Complex, and Santa Maria.

Floradale Avenue begins in Lompoc to the south of the river and becomes Santa Lucia Canyon Road on the north of the river as it crosses through the Lompoc Federal Correctional Complex, a complex which includes a Federal Correctional Institution, a US Penitentiary, and a Federal Correctional Facility Prison Farm which directly abuts the river. The facility also provides secondary access over the Santa Ynez River between VAFB on the north of the river, and their missile launch facilities on the south of the river and is commonly used to transport rocket components.

Cornerstone took over the project in following Type Selection and was able to deliver the project in less than three years. Incorporated into this was a value engineering effort undertaken by Cornerstone in reviewing and revising the previously prepared Type Selection Report provided by the County at the onset of the project resulting in almost $2 million in estimated savings to the project construction cost. The replacement bridge will consist of a 4 span cast-in-place haunched prestressed concrete box girder bridge supported on large diameter drilled piles to resist scour. The bridge span configuration and profile grade were carefully refined in cooperation with Caltrans to produce an ideal balance between hydraulics, freeboard, scour, and roadway impacts while minimizing project costs.

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