SR 84 Stonybrook & Alameda Creek Overhead Bridge
The project is located along multiple locations of SR 84/Niles Canyon Rd. from SR 238 to SR 680. The project consists of a new cast-in-place flat slab bridge that spans the Stonybrook Creek and demolition and overhang widenings at the Alameda Creek Overhead. The Stonybrook Creek bridge required 550 LF of cast-in-drilled-hole concrete pile, 470 CY of Concrete, a temporary creek diversion system to work in the Stonybrook Creek, falsework and excavation shoring. The Alameda Creek Overhead required temporary supports for the overhang and barrier rail demolition and also served as formwork for placing back the overhang. The overhang demolition and replacement of the Alameda Creek Overhead Bridge overhang was performed during multiple 55-Hour Full Road Closures. The work included 277 CY of Rapid Strength Concrete (RSC) over the Union Pacific Railroad, California ST-75 Bridge Railing, and Anchor Blocks at various locations of the bridge. Work began June 15th, 2021 and is scheduled to conclude the end of May 2022.