Calpella Two Bridge Replacements
This project will replace the existing two bridges on State Route 20 (SR20) that span the Russian River and Eastside Road in Redwood Valley, Mendocino County (post miles 33.4 to 34.2).
The existing bridges will remain intact during construction to accommodate traffic. It was decided to construct one single bridge on an alignment slightly to the south allowing construction to take place with minimal impacts to the public.
Purpose and Need
The current Russian River Bridge was built in 1955 and is reaching the end of its service life. The Eastside Capella Overcrossing will also be replaced. The new bridge alignment will improve safety for motorists and bicyclists and will allow for better acceleration and deceleration lanes at the intersection of Route 20 and Road 144.
Project Timeline
- Begin Construction: June 2022
- End Construction: November 2025
Temporary Road Closures
- Road 144 at Route 20 is fully closed as part of our ongoing efforts to replace the two Calpella bridges. This closure is slated to last until the end of August and is necessary to reconstruct the intersection, which will feature enhanced acceleration and deceleration lanes.
- Eastside Calpella Road will be closed from Monday, June 3, through Friday, June 7, for the removal of the existing bridge. A detour is available for commuters traveling to and from Redwood Valley and the Business District.
Budget
- Construction Capital: $28,701K
- Right of Way Capital: $1,121K
Simulations of Proposed Designs
Contact Information
Project Manager
Robert King (707) 296-5573
Public Information Officer (Media Inquires)
Manny Machado (707) 496-6879, TTY 711
The new Calpella Bridge alongside the old Calpella Bridge in May 2024.
The new Calpella Bridge with stamped concrete walls in May 2024.
Construction is underway on the Calpella Two Bridge Replacement Project