All the laws of this Commonwealth relating to widening and straightening roads and highways, be and the same are hereby extended and made applicable to the widening, deepening and straightening of all such navigable streams: Provided, That the expense of the same, including the pay of juries of view, shall be borne by the parties through whose lands such navigable streams shall pass in proportion to the advantages received by such owners of lands: And provided, That the application for such widening, deepening and straightening, shall be made by the owners of two-thirds in extent of front of the lands upon the part of such stream proposed to be widened, deepened or straightened.