The purpose of the study reported in this paper was to determine efficiency, energy requirements and costs for alternate feedlot manure collection and hauling systems using time-motion analysis. Specific objectives were: to compare alternate collection systems on the basis of machine productivity, energy consumption, and cost; to determine optimum combinations of loader and truck fleet sizes for ... [Show full abstract] feedlot manure hauling. Time-motion analysis was used to analyze alternate methods of feedlot manure collection at four Texas feedlots with capacities of 28,000 to 100,000 head. The basic collection systems studied were: elevating scraper, wheel loader, and and wheel loader plus plowing or rototilling. Collection rates were 117-176 tons/hr; loading rates averaged 205 tons/hr; and job efficiency was 79-90%. Better machine selection and management can lower cost and improve efficiency.