Hamilton Shaft (Shaft No. 23)

Numbered as its own shaft (No. 23) by R.V. Harris and Golder. Deepened from 124.5 to about 170 ft (Golder's text says about 165); two tunnels from the Chappell Shaft met at 155 ft; holes drilled from its bottom to about 190 ft did not reach bedrock. Cribbing reported sound in 1965; the 1970 pumping test suggested it was still open to water.

No public source gives this hole's position.

What the Drill Found

1. 0 ft
   SurfaceTop of the shaft
2. 115 ft
3. 115 to 118 ft
   Passes through Hamilton tunnel at 115 ft (1939)
4. 37 ft
5. 155 ft
   TunnelTwo tunnels from the Chappell Shaft met at 155 ft
   Golder App. I (after R.V. Harris)
6. 10 ft
7. 165 ft
   TunnelHamilton's tunnels, floor at 165 ft: a semicircular drive from the Chappell Shaft around the south side into the Hedden Shaft, with a second branch between the shafts
   Searcher tunnels, not original work. Golder (after Harris) has the two tunnels meeting at 155 ft.
   Erwin Hamilton to J.W. Lewis, 29 June 1950
8. 170 to 190 ft
   Soil / clayHoles drilled from the bottom to about 190 ft did not reach bedrock
   Hamilton to Lewis (1950): 18 or 20 holes drilled 20 ft below the 171 ft floor, inclined up to 10 degrees southwest, through gravel and soft material.
   Golder App. I (after R.V. Harris)

Rows are in depth order; the column on the left is the hole, and a figure between rows is the stretch with nothing logged. Depths as reported by each source.

Connected to Hamilton Shaft (Shaft No. 23)

• Hedden Shaft (Shaft No. 22)drilled from this shaft
• Hamilton tunnel at 115 ft (1939)115 to 118 ftsearcher tunnel · approximate

Sources

• Golder (1971) p6, p17, App. I p32; Harris and MacPhie (2013); J.W. Lewis, Notes on Hedden, Hamilton and other work (1950) p37
• Golder (1971) App. I p32
• J.W. Lewis, Notes on Hedden, Hamilton and other work (1950) p37
• Golder (1971) App. I p32; J.W. Lewis, Notes on Hedden, Hamilton and other work (1950) p37
• Positions and depths: see how we know this on the Money Pit Map.