TIL The concrete used to make the Hoover Dam is still curing to this day

http://articles.latimes.com/2010/sep/26/travel/la-tr-hooverdam-20100926



Submitted April 03, 2015 at 02:07AM by selectix http://www.reddit.com/r/todayilearned/comments/318ebn/til_the_concrete_used_to_make_the_hoover_dam_is/