sentences:  The plant found solutions to the problems of extracting a commercial grade of oil from the sands - problems that had been the concern of financiers, chemists, petroleum engineers, metallurgists, mining engineers, geologists, physicists and many other scientists and pseudo-scientists for many decades.In 1962 (the same year the Great Canadian Oil Sands proposal went up for approval) Cities Service Athabasca Inc. proposed a 16,000 cubic metre per day plant at the site of its Mildred Lake pilot project.Including a pipeline to Edmonton, the plant was to cost $56 million, with construction beginning in 1965 and completion in 1968.