TPW Roads

Highway 12 Earth Shoulder Widening at Las Palmas Subdivision

Project # C10003

Status: Complete


  • Widening the shoulder area on State Route 12 in front of the proposed subdivision
  • Removal of trees and vegetation on the westerly side of State Route 12
  • Construction of 2100 cubic yards of embankment
  • Removal of a small headwall and extension of drainage culvert


State Highway 12 in front of the proposed Las Palmas subdivision at 17310 Highway 12, in the Fetters Hot Springs community North of the city of Sonoma.


  • Bid Date: October 13, 2010
  • Awarded: December 7, 2010
  • Work Completed: Spring, 2011
  • Official Notice of Completion issued May 10, 2011

Contact Information

Business Hours
Monday – Friday
8:00 AM – 2:00 PM

Lobby Hours temporarily reduced as of 8/30/21 until further notice

Contact us by Phone
Office Location
La Plaza B
2300 County Center Drive
Suite B 100
Santa Rosa, CA 95403
38.462023, -122.725381

Standard Plans

Construction Standards for County Roads


Standard plans for construction of roads and related structures.