A 60 ft deep hole is dangerous as hell when not properly maintained. There's the Carbon Dioxide, Unstable walls, And an un-marked hole in an unsuspecting place isn't exactly safe either. A collapse might also damage the foundation of nearby buildings. A permit would definitely be required for a hole of that size.
I gotta give the guy credit though, a 60 foot hole in 10 days is impressive without machines.
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“It is better to be rich and healthy than poor and sick” - Dave Barry
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