Since the completion of construction in 1967, the METC Gasifier Pilot Plant has produced data and demonstrated operation on all major ranks of US coals. In 1976, METC began an expansion program to include a novel gas-cleanup facility to evaluate the environmental problems associated with gasification plants and also to develop improved cleanup systems. The construction and checkout of this full-scale cleanup system was completed within the past year and the pilot-plant facility now has the capability of gasifying all US coals and producing a relatively tar-, oil-, particulate-, and sulfur-free fuel gas. The Department of Energy's (DOE) fixed-bed gasification development program includes other facilities that provide DOE with a broad capability to address alternative- and advanced-gasification technologies. In addition to utilizing these facilities to evaluate and improve gasification/cleanup-system configurations, the pilot plants are also being used to support a number of related projects.