Spiral tunnel at 124 ft (Hamilton sketch)

Hamilton's sketch of the shafts shows a dashed loop marked "spiral tunnel 124'" and "spiral tunnel exposed 124'" curving round the Money Pit between the Chappell and Hedden shafts. No measurements survive beyond the sketch; the loop drawn here is schematic, about 25 ft across, centred on the historical Money Pit.

The record gives points, not the course between them.

Depth

Where It Sits

Connected to Spiral tunnel at 124 ft (Hamilton sketch)

• Chappell Shaft (Shaft No. 21)1931171 ftSearcher shaft
• Hedden Shaft (Shaft No. 22)1937170 ftSearcher shaft
• Money Pit (Shaft No. 1)1795114 ftSearcher shaft

Sources

• Erwin Hamilton, undated sketch of the Money Pit shafts (1939-41)
• Positions and depths: see how we know this on the Money Pit Map.