The GMACC-2 contract is needed to meet the continuing construction and facility maintenance requirements at GRC, consisting of both Lewis Field in Cleveland, Ohio and Neil A. Armstrong Test Facility (... The GMACC-2 contract is needed to meet the continuing construction and facility maintenance requirements at GRC, consisting of both Lewis Field in Cleveland, Ohio and Neil A. Armstrong Test Facility (ATF) in Sandusky, Ohio. GMACC-2 is the primary contract vehicle for GRC’s construction needs and provides new construction, rehabilitation, and modification of facilities and infrastructure.