 Initially, during placement of the first lifts of RCC, a small Komatsu D21A bulldozer was used for maximum manoeuvrability.Then, as RCC placement continued and placement rates increased, the team switched to a larger Caterpillar D5MXL and then to an even larger Deere 850 dozer outfitted with wings on the blade.Toward the top of the dam, as the working area began to narrow, the Cat D5MXL was again called into service.