The U.S. Department of Energy (DOE), National Nuclear Security Administration (NNSA), as lead agency is preparing a Site-Wide Environmental Assessment (SWEA) to evaluate the proposed continued operation and potential expansion of operations at the Kansas City National Security Campus New Mexico Operations (KCNSC NMO). The NNSA, a semi-autonomous agency within the DOE, awarded Contract DE-NA 00002839 to Honeywell Federal Manufacturing and Technologies, Inc. (Honeywell FM&T) to operate and manage the NNSA’s KCNSC NMO. This contract includes certain assigned tasks to conduct operations at KCNSC NMO. This work is conducted at several locations in the Albuquerque, New Mexico area, including specific properties within Kirtland Air Force Base (KAFB), to support the security, development, and manufacture of the non-nuclear components of nuclear weapons. KCNSC NMO has historically been included in the 1999 Final Site-Wide Environmental Impact Statement (SWEIS) for Sandia National Laboratories, New Mexico (SNL/NM) (DOE/EIS-0281). However, the new SNL/NM SWEIS that is in process does not include KCNSC NMO in that update. Therefore, KCNSC NMO is initiating the development of this stand-alone SWEA.