ORS § 778.090
Where it is necessary to widen the general channel or improve the navigation of the rivers or sloughs by requiring the removal or destruction of moorage facilities for houseboats, boathouses or pleasure craft in the rivers or sloughs, or by establishing or reestablishing wharf lines that have the effect of destroying or impairing the riparian rights of the adjoining owners, the adjoining owners or others owning the moorage facilities shall be reasonably compensated for the removal or destruction of the moorage facilities and for the destruction or impairment of the riparian rights; and shall not be required to remove or destroy the moorage facilities in absence of reasonable compensation therefor. The Port of Portland may acquire moorage facilities, riparian rights or the real property of adjoining owners by exercise of the power of eminent domain as provided in ORS 778.095.
ORS 778.090