World Trade Center Slurry Wall Quiz
by Staff
The World Trade Center slurry wall survived the September 11 attacks to become an iconic reminder of a nation's loss and resolve. Test your knowledge of this unique structure with our quiz.

When was the World Trade Center slurry wall built?

  • 1967
  • 1949
  • 1976

What was the purpose of the slurry wall?

  • support for the Twin Towers
  • to keep the basement, or "bathtub," from flooding
  • decorative

Where was the slurry trench underground wall-building method developed?

  • China
  • the United States
  • Italy

When was the slurry trench method developed?

  • 1960s
  • 1970s
  • 1940s

Where was the first proposed location of the World Trade Center?

  • Harlem
  • Lower East Side
  • Midtown

What organization built the World Trade Center?

  • Port Authority
  • Chamber of Commerce
  • Rockefeller Foundation

How thick is the original World Trade Center's slurry wall?

  • 3 feet (0.9 meters)
  • 18 inches (45.7 centimeters)
  • 20 feet (6 meters)

What were the ingredients of the slurry used in the slurry trench?

  • epoxy and resin
  • sand and gravel
  • clay and water

The consistency of the slurry is usually compared to what?

  • chunky peanut butter
  • ice cream
  • buttermilk

The site of the World Trade Center was what sort of land?

  • bedrock
  • landfill
  • sand

What was the name of the neighborhood where the World Trade Center was built?

  • Hells Kitchen
  • Soho
  • Radio Row

Where did the clay used in the slurry wall come from?

  • Queens
  • Wyoming
  • Pennsylvania

What was the purpose of the slurry used in the slurry trench dug by the World Trade Center's builders?

  • decorative
  • support
  • waterproofing

How deep was the slurry trench dug?

  • 50 feet (15 meters)
  • 80 feet (24 meters)
  • 102 feet (31 meters)

After the slurry trench was finished, what was pumped into the trench?

  • paint
  • glue
  • concrete

How much was budgeted to preserve and restore the slurry wall for the September 11 museum?

  • $50,000
  • $11 million
  • $42 million

How much of the original slurry wall was included in the museum project?

  • the entire wall
  • one 50-foot (15-meter) panel
  • three 20-foot-wide (6-meter-wide) panels

What now supports the slurry wall from the interior?

  • the basement of the Twin Towers
  • steel cables
  • nothing

What was applied to the slurry wall's surface to preserve it for museum visitors?

  • plastic
  • glass
  • shotcrete

What might have been endangered had the slurry wall given way during the September 11 attacks?

  • Brooklyn Bridge
  • subway system
  • LaGuardia airport