RCW 81.52.070: Fences—Negligence—Evidence.

In all actions against persons, companies or corporations, operating steam or electric railroads in the state of Washington, for injury to stock by collision with moving trains, it is prima facie evidence of negligence on the part of such person, company or corporation, to show that the railroad track was not fenced with a substantial fence or protected by a sufficient cattle guard at the place where the stock was injured or killed.