https://www.arlnow.com/2013/05/20/new-columbarium-opens-at-arlington-national-cemetery/
A new columbarium has opened at Arlington National Cemetery, just in time for Memorial Day.
Columbarium Court No. 9, as it’s called, has more than 20,000 niches for U.S. military veterans and their families. Each niche in the two-acre columbarium has space for 3-4 urns. The project cost $15.6 million and began in January 2012.
Columbarium Court No. 9 is 2.5 times bigger than the cemetery’s next-largest columbarium. Rockville-based contractor Forrester Construction, which built the new facility
Columbarium number nine project under construction.
What's underneath it? More tunnels? Haven't had time to look at Forrester Construction but it was done while Obama was in office so what else is there?