If any person is required by a district to pay the cost of extending a water main adjacent to property other than the person's own so that water service for domestic use is provided for such other property without further extension of the water main, the district shall require the owner of the other property, prior to providing water service to that property, to refund to the person required to pay the cost of extending the water main, a pro rata portion of the cost of the extension. The right to require such refund shall not continue for more than 10 years after the date of installation of the extension of the water main. The amount to be refunded shall be determined by the district and such determination shall be final.
ORS 264.320