or 3,396 miles of heading yet to be made, of which 1,218.975 feet are between the west end and the west shaft, and 16,714.366 feet between the west shaft and east end of the tunnel.
The central shaft is down 583 feet, and well No. 4 is down 150 feet.
The progress for the month of November, 1867, was as follows:
East end heading 126.00 feet
West shaft, east heading 33.00 "
" " west heading 5.00 "
West end 20.00 "
--------
Total for the month of November 184.00 "
Thirty feet of brick arch were completed during the month at the west end, making a total of 516 feet of brick arch completed to date.
The progress for the last six months has been as follows:
East end 711.00 feet
West shaft, east heading 216.00 "
" " west " 288.00 "
West end 180.00 "
---------
Total, from June 1, to Dec. 2 1,395.00 "
" for the previous six months 632.00 "
---------
" " year ending Dec. 2, 1867 2,027.00 "
The new shaft has been sunk, and at its foot are the pumps which, together with those at the west shaft, are now throwing out between 900 and 1,000 gallons of water per minute.
During the last month great quantities of water were struck at both headings of the west shaft (70 gallons per minute at the east heading in one day), and the work was stopped in consequence, which accounts for the small progress at this point. A new pump of 1,000 gallons per minute capacity will be at work, in addition to the above, in a few days, and the work can then go forward with increased rapidity.
Well No. 4 is an artesian well, which is now being carried down as a shaft to afford two more faces to work from. Its depth will be, when finished, 215 feet, its dimensions 8 by 8 feet.