That it is a part of the public policy of the state of Washington that all work "by contract or day labor done" for it, or any political subdivision created by its laws, shall be performed in workdays of not more than eight hours each, except in cases of extraordinary emergency. No case of extraordinary emergency shall be construed to exist in any case where other labor can be found to take the place of labor which has already been employed for eight hours in any calendar day.
RCW 49.28.040