freeway crossings - pipeIn the second half of 2013, the City of Napa replaced several aged, leaking, and undersized freeway crossings with new mains to improve circulation within the water system.  As highlighted in a July 2013 Napa Valley Register article, the Water Main Freeway Crossings Project employed the Horizontal Directional Drilling (HDD) method and made the following improvements within Salvador Avenue, Sierra Avenue, and F Street (see General Project Map):

  • Installation (via HDD) of a 24" Fusible C905 casing for a new 16" Fusible C905 water main across Highway 29 at Salvador Avenue and at Sierra Avenue
  • Installation (via HDD) of a 16" Fusible C905 casing for a 12" Fusible C900 water main across Highway 29 at F Street
  • Upgrade of an existing 6" water main within Sierra Avenue to a new 12" water main from Lassen Street to Jefferson Street
  • Installation (via HDD) of a new 12" Fusible C900 water main from Jefferson Street to Garfield Park
  • Upgrade of existing 6" and 8" water mains within Salvador Avenue to a new 12" water main from Byway East to Encina Drive
  • Upgrade of an existing 6" water main within F Street to a new 12" water main from the western terminus at Highway 29 to California Blvd

freeway crossings - night workWhile the public was requested to stay away from construction operations for safety reasons, the Water Division posted photos on this web page as construction proceeded.  Drilling operations were completed by late summer 2013 along with the Salvador Avenue improvements.  The full project, including the Sierra Avenue and F Street improvements, was completed by December 2013.

Generally, the work progressed from Salvador Avenue to Sierra Avenue to F Street.  Project phases are shown below (see maps for further details):

Salvador Avenue Improvements (see Phase Map - Salvador)

freeway crossings - salvador phase 1 - facing east 1PHASE 1 - Solano Avenue to Byway East

Construction Type:  HDD
Status:  COMPLETED

PHASE 2 - Byway East to Escuela Drive

Construction Type:  Trench
Status:  COMPLETED

PHASE 3 - Escuela Drive to Encina Drive

Construction Type:  Trench
Status:  COMPLETED

PHASE 4 - Intersection Work

Construction Type:  Minor Trench
Status:  COMPLETED

 

Sierra Avenue Improvements (see Phase Map - Sierra)

freeway crossings - sierra ave 1PHASE 1 - Solano Avenue to Lassen Street

Construction Type:  HDD
Status:  COMPLETED

PHASE 2 - Jefferson Street to Garfield Park

Construction Type:  HDD
Status:  COMPLETED

PHASE 3 - Lassen Street to Diablo Street

Cfreeway crossings - sierra ave 2onstruction Type:  Trench
Status:  COMPLETED

PHASE 4 - Diablo Street to Hamilton Street

Construction Type:  Trench
Status:  COMPLETED

PHASE 5 - Hamilton Street to Jefferson Street

Construction Type:  Trench
Status:  COMPLETED

PHASE 6 - Intersection Work

Construction Type:  Minor Trench
Status:  COMPLETED

 

F Street Improvements (see Phase Map - F St)

 PHASE 1 - Coffield Avenue to F Street cul-de-sac

Construction Type:  HDD
Status:  COMPLETED

PHASE 2 - F Street cul-de-sac to California Blvd

Construction Type:  Trench
Status:  COMPLETED

PHASE 3 - Intersection Work

Construction Type:  Trench
Status:  COMPLETED