California Code, Water Code - WAT § 14021

Grant funds shall be expended by the public agency within three years of the making of the grant. No grant funds may be expended by the public agency unless the public agency is able to demonstrate to the department, within one year of the making of the grant, supported by an acceptable bid, that the amount to be expended for the project will be within 20 percent of the public agency's cost estimate for the project.