Any portion of the cost or expense that is contributed or borne by any public authority under ORS 824.200, 824.204, 824.206, 824.210 to 824.218 and 824.226 shall forever be considered as held in trust by the railroad company receiving the same or the benefits thereof, and no part thereof shall be considered a part of the value of the property of the railroad company upon which it is entitled to receive a return.
ORS 824.256