In a water diversion system, in a preferred embodiment, a first fold of a deflector is disposed into a first hanger cavity and a second deflector fold is disposed into a second hanger cavity. The first fold of the deflector cooperates with the first cavity of the hanger to allow a resistance hinge-like action of the deflector. The deflector may be lifted open by compression of a curve of the deflector to remove the second fold of the deflector from the second hanger cavity. Methods are provided in which, in a preferred embodiment, a deflector-forming machine is disposed above a trough-forming machine and the deflector-forming machine is moveable forward and backward relative to the trough-forming machine. In another preferred method, material cradles for the respective machines are loaded with coil and disposed relative to each other above the deflector-forming machine that is placed above the trough-forming machine as material for the trough-forming machine passes over at least a portion of the material cradle for the deflector-forming machine. Two-armed run-out stands having upper and lower arms provide work placement for lengths of deflector and trough. Preferably, end caps are two-piece, with one piece fitted to a trough length and a second piece fitted to a deflector length.