Was this built by a dog who hates fireworks?

"[The bunker] comes equipped with 2 NBC (nuclear, biological, chemical) filter systems...two entry ways plus an emergency escape hatch, storage for 7000+ gallons of water, geothermal heating and cooling, and 3 bar structure to withstand extreme pressure...".
https://www.zillow.com/homedetails/18461-Little-Park-Rd-Glade-Park-CO-81523/13977405_zpid