Section 20403 Of Article 26. Boards Of Supervisors—county Bridges Or Subways From California Public Contract Code >> Division 2. >> Part 3. >> Chapter 1. >> Article 26.

. Whenever the board of supervisors finds that the estimated expense of any work to be done on any county bridge is ten thousand dollars ($10,000) or less, the board or the purchasing agent may let a contract covering both work and material, or purchase the materials and let a contract for doing the work, without calling for bids.