 In the late 1930s through early 1940s, Diablo was the headquarters for the 3rd locks project, it being located directly across the Canal from the Pacific side 3rd locks and approach excavation.The Engineering Division was headquartered here, and the Board of Local Inspectors (which investigated ship accidents) relocated here in the 1980s, using the old Diablo elementary school.The "Diablo Clubhouse" was a center for social activity, and included a cafeteria, vending machines, a movie theater, bowling alley, barber shop, beauty shop, seamstress, tailor, a store for Boy Scout and Girl Scout uniforms and supplies, and a number of other services.