Williams Transco Central Penn Line South. Williams Transco Central Penn Line South. Unlike liquid petroleum product pipelines, where the main risk is a leak leading to contamination of water and soil, the main risk with a high-pressure natural gas pipeline is a rupture and ensuing fire.
The White House today holds 142 rooms on six floors, the floor space totaling approximately 55,000 square feet. It has hosted longstanding traditions such as the annual Easter Egg Roll, as well as historic events like the 1987 nuclear arms treaty with Russia.
A grand mansion in Alabama is the largest home currently on the market in the U.S., according to Curbed. A virtual Versailles of the South, the Birmingham home is 54,400 square feet. That would be stunning enough, but when added to the square footage of the estate's equestrian lounge and two-bedroom guest house, the entire compound becomes a whopping 62,000 square feet.