Los Alamos is a long way from any ocean. The amount of security needed to haul this stuff outside the secret city (at that time) would have been prohibitively e

Los Alamos is a long way from any ocean. The amount of security needed to haul this stuff outside the secret city (at that time) would have been prohibitively expensive and a distraction from the mission. In later years when the city was no longer secret, the excuse was mostly the lazy one of "we've always done it this way."