Business Wire says T.J.T., Inc., is closing its Platteville, Colorado, operation which served manufactured housing plants in a tri-state area with recycled axles, running gear and tires.  Many of the plants have either closed or reduced housing production.  T.J.T., established in 1977, is moving its collection and distribution operation to Watford City, North Dakota, where it will also provide piers, anchors, skirting and other supplies to the manufactured housing industry.