Carla B. Hass



(PLACERVILLE, CA) -- El Dorado County's Department of Transportation (DOT) will be performing structures, roadway, drainage, and bridge maintenance work on Mosquito Road from 0.6 miles north to 0.8 miles south of the Mosquito Road Bridge which will require full closure of Mosquito Road at the gates beginning Tuesday, May 30, 2023 and continue through Sunday, August 6, 2023, while school is out of session. 


A detour has been established via Rock Creek Road for which motorists should expect delays and allow extra time for travel.


Mosquito Road & Mosquito Bridge

May 30, 2023


August 6, 2023


    All Day



Mosquito Road Bridge

July 10, 2023


July 28, 2023


    All Day




The closure is necessary to ensure motorist and worker safety while the County's Contractor performs drainage system installations, roadway excavation, retaining wall construction, roadway embankment fill, and roadway tie-in at the north limits of the Project. 


The County DOT Bridge Crew will also be performing annual bridge maintenance work on the Mosquito Road Bridge from Monday, July 10, 2023 through Friday, July 28, 2023 while the roadway is closed.     


All work by the County's Contractor and County DOT Bridge crew will be left in a condition that will accommodate emergency access at the end of each shift and on weekends in the event of an emergency or evacuation.  The County will update Emergency Services in advance and daily if any work is needed that will prevent access.  In the event of an evacuation, the Project and bridge maintenance work will shut down to accommodate Emergency Services and public traffic.


During the full closure work, Project activities adjacent to Mosquito Road will continue to require intermittent reversing traffic controls, flaggers, construction signs, changeable message boards, and piloted semi-truck/trailer loads as needed.  Various locations of Mosquito Road will utilize these traffic controls at various times and dates from Union Ridge Road to Rock Creek Road and may also include the dirt road access to Quintet Fire Station.


Unless there is a public safety concern, traffic stops are intended to be a maximum of ten minutes. Delays could be up to 20 minutes depending upon traffic of slow-moving equipment and wide loads.  Traffic will be released as soon as there is safe travel through the work zones. 


The public should anticipate these delays, drive the posted speed limits and anticipate slowdowns in work zones.


The County sincerely appreciates the cooperation and patience of motorists that use this roadway, and we apologize for any inconvenience as a result of these closures.


For questions regarding this construction, please contact the County's Transportation main line at (530) 621-5900 (select Option 3 for Engineering).






Providing safe, healthy and vibrant communities; respecting our natural resources and historical heritage.