The Jar in the Culvert: Why a New Key Appeared Underground
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The Jar in the Culvert: Why a New Key Appeared Underground
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A dry Mason jar sat upright on undisturbed silt inside an 18-inch culvert after three days of rain, holding a brass house key cut less than four months earlier - yet there were no fingerprints, footprints, drag marks, or any disturbance. How did a freshly cut key end up sealed in a jar sixty-three feet underground with the surrounding pipe too narrow for a person to have set it there?
In this episode, we tell the story of Marvin Doyle and the strange events at his house on Fenner Circle, laying out the physical evidence, the geological findings the buyers never saw, and the meticulous logs Doyle kept as the pulses began; could mechanical explanations account for every anomaly, or is one mystery left unexplained?
Person: Marvin Doyle
Location: 4 Fenner Circle, Millbrook Township
Date: May 9, 2011 (jar discovery); first recorded pressure event October 14, 2010
Item: one-quart Mason jar with a brass house key on cotton twine
Geological finding: perched water table ~22 feet below finished grade; limestone with solution channels (survey completed 2002)
- The culvert is an 18-inch-diameter pipe running 63 feet underground to a detention basin.
- The Mason jar was dry despite three days of hard rain and saturated ground around the culvert.
- The brass house key inside the jar had been cut less than four months before May 9, 2011; locksmith Ed Polzin cut exactly two copies for 4 Fenner Circle.
- Marvin Doyle recorded 12 pressure events between Oct 14, 2010 and Nov 2010, all occurring between 3:50 and 4:40 a.m., with one example dropping from 52 PSI to 31 PSI in under a minute then normalizing in four minutes.
- A geological survey completed in 2002 identified a perched water table ~22 feet below grade and predicted hydraulic pulses; that survey was not shown to buyers.
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