Drift excavated to full width and bench. Muck
loaded by steam shovel.
=====================================================
THIRTY-SECOND STREET.
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1 | 2 | 3 |
-----------------------------+--------+--------------------+
| | |
| | |
Type of excavation. |Tunnels.| Worked from: |
| | |
| | |
-----------------------------+--------+--------------------+
Full-sized single tunnel | C | 1st Ave. shaft. |
| | |
Full-sized single tunnel | D | 1st Ave. shaft. |
| | |
Full-sized twin tunnel |C and D | 1st Ave. shaft. |
| | |
| | |
| | |
Narrowed twin tunnel | C |Intermediate shaft. |
| | (East of shaft.
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