Production of the 4650-cubic foot 3-bay cars began in 1964. ACF built 2504 examples at Huntington, WV, between 1964 and 1972. The ACF 4650 c.f. 3-bay hopper was the same height and width as the 5250 c.f. 4-bay car but several feet shorter in length and only had 3 bays. Uses: Grain, soda ash, plastic pellets.