. "The Alva, Wyoming company whose motto is ???You can???t break them, and they won???t break you!??? also produces from used open-pit haul truck and loader tires such items as feed bunks, salt and mineral feeders, rip-rap for reservoir fills, windbreaks, and more ??? all of which last a lifetime. ???The troughs will be virtually indestructible, unlike metal troughs that are subject to rust and other" . . . . .