Wash. Rev. Code § 47.60.040
For the purpose of obtaining information for the consideration of the department upon the acquisition of any ferries or ferry facilities or the construction of any toll bridge under this chapter, the department shall make any examination, investigation, survey, or reconnaissance for the determination of material facts pertaining thereto.
The cost of any such examination, investigation, survey, or reconnaissance, and all preliminary expenses leading up to and resulting in the issuance of any revenue bonds including, but not being limited to expenses in making surveys and appraisals and the drafting, printing, issuance, and sale of bonds under this chapter shall be borne by the department out of the motor vehicle fund. All such costs and expenses as well as any thereof heretofore incurred shall be reimbursed to the motor vehicle fund out of any proceeds derived from the sale of bonds or out of tolls and revenues to be derived by the department through its operations hereunder.
RCW 47.60.040