Construction Projects
Sonoma Public Infrastructure's offices are now located at 400 Aviation Blvd, Suite 100, Santa Rosa, CA 95403.
Welcome
The Department of Transportation & Public Works (TPW) administers road construction and other infrastructure improvement projects.
Bidding on Projects
For capital projects, bidders need to follow bidding instructions carefully and be sure make all submissions prior to the project's submission deadline.
The County opens all Bids (envelopes or electronic) promptly following the submission deadline and initially evaluates them for responsiveness, and to determine an Apparent Low Bidder. The Sonoma County Director of Transportation & Public Works then reviews the bids and refer them to the Board of Supervisors to consider awarding the project. The review process is complete within 60 days of the bid opening.
Online Bidding
Bidders can obtain Bidding Documents at no charge by registering at Sonoma County's Supplier Portal, the County's online procurement system:
Register or Log in to Sonoma County's Supplier Portal
Hand Delivered Bids
Although online submission is preferred, Sonoma County will continue to accept hand delivered or mailed Bids.
2020-2021 Pavement Preservation
Projects for 2020 and 2021 are shown below. Project locations are preliminary and may be subject to change. See list of roads
 | 2021 Road Paving Projects (subject to change) |
 | Roads being paved this year |
 | Road Paving Projects completed last year |