Wash. Rev. Code § 35.91.060
(1) As an alternative to the procedures provided in RCW 35.91.020 for financing the construction or improvement of water or sewer facilities, a municipality may create an assessment reimbursement area on its own initiative, without the participation of a private property owner, finance all of the costs associated with the construction or improvement, and become the sole beneficiary of reimbursements.
[ 2015 c 96 s 1.]