Mosquito Bridge

Mosquito Bridge Project

Welcome to the El Dorado County Mosquito Road Bridge Project website.

The Mosquito Road Bridge Replacement Project is a Highway Bridge Program (HBP) project that is eligible for federal funding under the HBP Off Federal Aid System 100% Reimbursement Program. The project is currently in the design and right-of-way phases.

All materials and documents used during the public outreach as well new information and announcements as they become available are provided through the links below.

The public is encouraged to remain engaged throughout the process.

What's New

Department of Transportation will soon be accepting construction bids through Quest Construction Data Network,, for the Mosquito Road at South Fork American River Bridge Replacement Project. An approximately 1,180-foot long, three-span, cast-in-place pre-stressed concrete segmental box girder bridge will be built at 400 feet above the South Fork of the American River with an estimated construction cost of $60M. Transportation plans to start the bidding for the Project in mid-December of 2021. Construction is anticipated to start in the spring/summer of 2022. Construction firms can subscribe to Transportation's Notices to Bidders at and you will receive a notice when this page is updated to include new projects out to bid. 

Mosquito Bridge Conversion Project Overview & Grant Opportunity Presentation to the Parks and Recreation Commission - posted 09-17-21

Mosquito Road Bridge Presentation to the Board of Supervisors to Award RFP 20-961-081 - posted 08-16-21 

Mosquito Road Bridge Project's High Cost Agreement Approved by Board of Supervisors - posted 05-04-21

Updated Project Schedule* â€“ posted August 16, 2021

*This is an approximate project schedule for the remaining milestones before beginning construction and is subject to changes and updates as the project progresses*

Mosquito Road Bridge Project Update & EIR Addendum Presentation in December 2019 - posted 1/8/2020 Click here for Agenda Item

Mosquito Road Bridge Project Update - October 2017

Board of Supervisors Certification and Adoption of the Final Environmental Impact Report - August 8, 2017

Board of Supervisors Agenda Item 17-0090 – Maintaining the existing Mosquito Road Bridge – May 9, 2017:

"The Board has the present intent to maintain the existing Mosquito bridge for pedestrian and bicycle use after the new bridge is finished unless it becomes economically infeasible to do so…"

Notice of Availability & Public Meeting of a Draft EIR - October 26, 2016

Board of Supervisors Presentation - August 16, 2016

Mosquito Bridge Public Workshop #3 - July 15, 2015

Board of Supervisors Presentation - April 28, 2015

Mosquito Bridge Public Workshop #2 - November 15, 2014


 Mosquito Bridge Public Workshop #1 - January 26, 2013