Timelapse install of an R-Tank Rainwater Infiltration System - YouTube
R-1 tank - Wikipedia
200520 ACF Environmental - R-Tank Stormwater Management - Nursing Home - Richmond VA - All Footage Window Burn on Vimeo
Underground Storage for Stormwater Runoff - R-Tank | Fabco Industries
It turns out there is another tank in Czarna Nida River in Poland. The Bergepanther was dragging an evacuated tank Panzer IV behind it, and a another suprise elements of Sdkfz 251D