CA Sts & High Code Section 1724

Thereafter, the board of supervisors of the county may acquire, construct and maintain such highway as other county highways are acquired, constructed and maintained and may pay for such work out of one or more of the following:

(a)

The proceeds of any county bond issue for county highway construction;

(b)

The road fund;

(c)

The county general fund;

(d)

Any other funds available for county highway purposes.