===================================================== 8 -----------------------------------------------------
----------------------------------------------------- Top heading and bench. Muck loaded by hand.
Top full-width heading and bench. Muck loaded by steam shovel. Working exclusively on this heading.
Top center heading and bench. Muck loaded by steam shovel. Working alternately in headings east and west of the shaft.
Top center heading and bench. Muck loaded by steam shovel. Working alternately in headings east and west of the shaft.
Top full-width heading and bench. Muck loaded by steam shovel working exclusively on this heading.
Exploration drift about 9 ft. by 12 ft. Mucking by hand. Fourteen timber bents were placed in March, and seven in April, 1907.
Drift excavated to full width and bench. Muck loaded by steam shovel. =====================================================
============================================================ 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.) | | | | | | | Narrowed twin tunnel | C |Intermediate shaft. | | | (East of shaft.) | | | | | | | | | | | | | Full-sized twin tunnel |C and D |Intermediate shaft. | | | (West of shaft.) | | | | Exploration drift |C and D |Intermediate shaft. | | | (West of shaft.) | | | | Twin tunnel. Enlargement }|C and D |{ Eastward from | of exploration drift }| |{ open cut. | | | | Twin tunnel. Enlargement }|C and D |{ Eastward from | of exploration drift }| |{ open cut. | | | | =============================+========+=====================
==================================+========+============+============= 4 | 5 | 6 | 7 | ----------------------------------+--------+------------+------------+ | | Length | Average | DATES. | Time | tunnel | advance | ----------------------------------|elapsed,| excavated, | per day, | | | in | in | in | From | To | days. |linear feet.|linear feet.| ----------------------------------+--------+------------+------------+ Jan. 25, 1906.|Apr. 30, 1906. | 95 | 367 | 3.9 | | | | | | Jan. 27, 1906.|Apr. 30, 1906. | 93 | 354 | 3.8 | | | | | | { May. 22, 1906.|July 24, 1906.[E]}| 173 | 810 | 4.7 | { Aug. 11, 1906.|Nov. 29, 1906. }| | | | | | | | | | | | | | Mar. 19, 1906.|May 28, 1906. | 70 | 58 | 0.8 | | | | | | | | | | | | | | | | { May 29, 1906.|July 3, 1906.[E]}| 208 | 1,206 | 5.8 | { July 18, 1906.|July 31, 1906. }| | | | { Aug. 12, 1906.|Nov. 23, 1906. }| | | | { Jan. 15, 1907.|Feb. 5, 1907. }| | | | { Feb. 17, 1907.|Mar. 21, 1907. }| | | | | | | | | Dec. 1, 1905.|May. 10, 1906. | 161 | 225 | 1.4 | | | | | | | | | | | Feb. 1, 1907.|Sept.13, 1907. | 225 | 1,033 | 4.6 | | | | | | | | | | | }Feb. 1, 1908.|Feb. 14, 1908. | 14 | 65 | 4.6 | } | | | | | | | | | | }Feb. 15, 1908.|Apr. 14, 1908. | 59 | 524 | 8.9 | } | | | | | | | | | | ======================================================================