Under the North-West Irrigation Act the term "works" means any "dykes, dams, weirs, flood-gates, breakwaters, drains, ditches, basins, reservoirs, canals, tunnels, bridges, culverts, cribs, embankments, headworks, flumes, aqueducts, pipes, pumps and any contrivance for carrying or conducting water or other works ... which are authorized to be constructed under the provisions of the Act." 49