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Silverado Canyon Bridge (No. 55C-0177) Replacement Project

Orange County Public Works, in cooperation with the California Department of Transportation (Caltrans), is proposing to replace the Silverado Canyon Road Bridge (Bridge No. 55C-0177) over Silverado Creek. The Silverado Canyon Road Bridge is located in Silverado Canyon surrounded by the Cleveland National Forest. The existing bridge is a single span and crosses over Silverado Creek. The proposed Project will replace the existing substandard steel bridge; a portion of the construction funding is provided by the Highway Bridge Program (HBP).  

The proposed replacement structure as of date is a single span prestressed, precast concrete voided slab girder bridge. The bridge will be raised approximately three feet to increase hydraulic conveyance. However, the bridge will only be able to pass the approximate 5-year storm event. Raising the bridge higher would greatly impact residents to the east of the bridge. The abutments, similar to the existing bridge, will be set on spread footing foundations. Bridge barriers will be side mounted open metal railing, Type ST-70SM. The replacement bridge will have 12-foot wide lanes and will include a 4-foot shoulder on the north side and 6-foot shoulder on the south side, for a minimum total barrier to barrier width of 34 feet. 

Appendices

Please submit written comments by January 24, 2022, to the person listed below:

assignment_indSam Tieu, PE
OC Public Works - OC Infrastructure - Project Management
place 601 N. Ross Street, Santa Ana, CA 92701
 phone  (714) 647-3968 | email Sam.Tieu@ocpw.ocgov.com