RCW 36.79.160 provides that counties shall submit vouchers for payment of the RATA share of the cost of work completed on each RAP project. This chapter describes the manner in which the county road administration board will implement the provisions related to payment of vouchers.

The county road administration board shall prepare and distribute to all counties with approved RAP projects, voucher forms for use in requesting progress payments and final payment for each approved RAP project.

The county constructing each RAP project may submit vouchers monthly as the work progresses and shall submit a final voucher after completion of each RAP project for the payment of the RATA share of the project cost. Each voucher shall include total project costs to date, including costs covered by other funding sources. The county shall include with each voucher sufficient documentation to verify costs. Reimbursable costs include all eligible direct costs for the design phase, right-of-way phase in allowed regions, and construction phase. Indirect costs including overhead and support services shared by multiple department's programs or funds such as accounting, payroll, administrative, or human resources salaries and benefits and information technology services for the municipality shall not be reimbursed. The chair of the county road administration board or his/her designee shall approve such vouchers for payment to the county submitting the voucher.

Upon approval of each RAP project voucher by the chair of the county road administration board or his/her designee, it shall be transmitted to the state treasurer.