The incident happened on Trinity Place around 11 a.m. on Friday and officials say the well had been buried.
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A construction crew that was working on her deck heard her fall in and called police.
The woman, in her 60s, was down the well for about 45 minutes before first responders were able to get her out.
They used a haul system to lift her to safety.
"She was completely alert and conscious, we were talking and had a nice conversation, we called her husband twice to try to get him to let her dogs out," one of the rescuers said.
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Police say if it weren't for the construction worker who heard her screams, she could have been down in the well for hours.
She said she had walked in the same spot more than 100 times and never realized there was a well.
The woman was taken to the hospital, but officials say she only suffered minor injuries.
Construction workers have since placed wood over the hole to make it more obvious.
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