Under no circumstances should a city pour a slab of concrete to build temporary ramps as the funds would be much better spent building a permanent concrete skatepark to begin with. Most concrete skateparks will cost between 20 and 25 dollars (USD) per square foot to build.
From the ground to the roof it is 442 meters (1,450 feet) tall. It was designed by Fazlur Khan and Bruce Graham. Willis Tower is the second-tallest building in the United States. It is the eighth-tallest freestanding structure in the world. It is one of the most popular tourist destinations in Chicago.
Willis Tower, owned/managed by Equity Office, a portfolio company owned by Blackstoneâs real estate funds, has earned the U.S. Environmental Protection Agencyâs (EPAâs) ENERGY STAR certification, which signifies that the building performs in the top 25 percent of similar facilities nationwide for energy efficiency and meets strict energy efficiency performance levels set by the EPA.