Gov. Code, § 50793

The proceeds from the sale of all bonds authorized under the provisions of this chapter shall be paid into the treasury of the local agency to the credit of the construction fund which the treasurer is hereby directed to establish for the particular project for which the bonds were authorized. The moneys in the construction fund shall be kept separate and apart from all other funds in the treasury of the local agency and shall be paid out and disbursed on the order of the board in the same manner that other funds are paid out and disbursed from the treasury of the local agency solely for the construction of the particular project for which the bonds were authorized, including preliminary reports, surveys, preparations, plans and specifications and for the payment of all other costs and expenses prior to and during construction, including the acquisition of necessary rights of way, easements, lands and other property of every kind and description and appurtenances thereto, and the payment of all expenses, engineering and administrative costs as provided by the board in the proceedings for the issuance of such bonds.