Section 538.420 - Portland's right to waters of Bull Run and Little Sandy Rivers; vested rights not impaired; applicability of law(1) Exclusive right to the use of waters of Bull Run and Little Sandy Rivers is granted to the City of Portland. However, the Water Rights Act (as defined in ORS 537.010) shall not impair the rights of any person who, on February 24, 1909, had any vested right to or valid appropriation or bona fide notice of appropriation of the waters of either Bull Run River or Little Sandy River, under laws theretofore in effect or under any valid contract or deed of conveyance theretofore made with or by the City of Portland.(2) ORS 541.010 to 541.080 shall not apply to Bull Run Creek or River.