This environmental assessment (EA) evaluates the potential for environmental impacts as a result of the proposed deactivation of 50 Minuteman III (MM III) Intercontinental Ballistic Missile (ICBM) Launch Facilities (LFs) and 5 Missile Alert Facilities (MAFs) assigned to Malmstrom Air Force Base (AFB), Montana. Deactivation of 50 LFs and 5 MAFs equates to the inactivation of an entire missile squadron (MS).