The board of directors shall have power to construct the said works across any stream of water, watercourse, street, avenue, highway, railway, canal, ditch or flume which the route of said canal or canals may intersect or cross, in such manner as to afford security for life and property; but said board shall restore the same when so crossed or intersected, to its former state as near as may be, or in a sufficient manner not to have impaired unnecessarily its usefulness; and every company whose railroad shall be intersected or crossed by said work shall unite with said board in forming said intersections and crossings and grant the privileges aforesaid; and if such railroad company and said board, or the owners and controllers of said property, thing or franchise to be crossed, cannot agree upon the amount to be paid therefor, or upon the points or the manner of said crossings or intersections, the same shall be ascertained and determined in all respects as herein provided in respect to the taking of land.