Gate closures Published July 6, 2011 By 28th Civil Engineer Squadron ELLSWORTH AIR FORCE BASE, S.D. -- The 28th Civil Engineer Squadron will be closing the access gates to Ellsworth Air Force Base throughout July for scheduled maintenance and repairs. Below are the scheduled repair times for the individual gates. Patriot Gate July 19 from 6 a.m. to 2 p.m. Liberty Gate via Davis Drive July 20 from 6 a.m. to 2 p.m. Liberty Gate via Schriever Street July 21 from 6 a.m. to 2 p.m.