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By the numbers: Data & statistics on Wallenda's historic walk

7: The number of generations of “Great Wallendas,” known for their high-profile daredevil stunts

33: Age of Nik Wallenda

45: Estimated number of minutes it will take Wallenda to walk over Niagara Falls

5: Diameter in centimetres of Wallenda’s tightrope

60: Height in metres of Wallenda’s tightrope above the gorge bottom

550:  Approximate length in metres of the tightrope crossing the Niagara gorge

46: The length in metres of Wallenda’s Guinness world record stunt in 2008 – the longest distance and greatest height ever traveled by bicycle on a high wire. He walked out from the roof of Newark, N.J.’s Prudential building and rode back on a bike

6: Number of Guinness world records held by Wallenda

The first time someone crossed Niagara Falls on a tightrope (Jean Francois Gravelet, “The Great Blondin”)

1896: The last time someone crossed Niagara Falls on a tightrope (James Hardy)

The year Karl Wallenda, Nik’s grandfather, fell to his death walking a tightrope between two buildings in Puerto Rico. The fall was blamed on “bad rigging”

Number of people expected to attend Friday night’s stunt in Niagara Falls.

Wallenda’s target donation amount on website indiegogo.com for “training, rigging, marketing, travel, safety and unforeseen issues”

Amount raised so far on indiegogo.com (as of Friday morning)

$20.5 million:
Amount expected to be spent in Niagara Falls by “non-locals” during the walk day, according to an economic impact report by Enigma Research

$122 million:
Amount of “legacy” economic impact over the next five years, according to Enigma

$1.3 million:
The amount Wallenda estimates the stunt will cost him (including the fabrication and installation of the custom-made steel wire, permits and security on both sides of the border as well as travel and marketing). He’s recouping some of those costs with a broadcast deal with U.S. network ABC

Sources: indiegogo.com; niagaraparks.com; nikwallenda.com; Enigma Research report