(Added by Ordinance No. 148968, effective January 26, 1980.) The Washington County Water Supply Construction Fund is hereby created. Contributions from other water purveyors and the City of Portland and receipts obtained from the issuance of general obligation bonds, payable from water revenues, issued for the purpose of constructing a water supply line to Washington County shall be placed in this fund and expended only for duly authorized payments for the oversizing of the southeast Water Supply Line and the Washington County Water Supply Line. Upon completion of the supply line to Washington County and after all liabilities for the construction thereof have been satisfied, any balance remaining in this Fund shall be transferred to the Washington County Water Supply Bonded Debt Service Sinking Fund and this Fund shall be discontinued.