ORS § 523.030
A geothermal heating district may be formed for the purpose of supplying inhabitants of the district with geothermal heat as provided by this chapter. In connection with supplying geothermal heat, a district may supply, furnish and sell for any use any surplus geothermal heat over and above the heating needs of its inhabitants to persons outside the district, or to school districts or other local governments as defined in ORS 174.116. All railroad rights of way or improvements thereon or rolling stock moving thereover shall be excluded from districts organized under ORS 198.010, 198.180, 198.510, 198.705, 199.420, 255.012, 366.321, 451.573 and this chapter and for purposes of this chapter shall not be considered as property within the boundaries of such districts, unless the owner of the railroad property expressly consents to its inclusion.
ORS 523.030