Cell phone video from Adam Eisenhardt captured the moment the man ascended from the manhole Tuesday morning.
Construction workers first heard the man yelling for help.
After he was pulled out, he was taken to the hospital for hypothermia and dehydration.
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Firefighters say there's not enough room to crouch down in the storm sewers, saying it's pretty much belly-crawling.
Police have not filed charges.
The man did not reveal how and why he ended up in the pipes.