------------------------------+----------+----------+----------+ |Number of | | Average | Location. | days | Advance. | advance | | worked. | | per day. | ------------------------------+----------+----------+----------+ Station 323 to Central Shaft | | | | headings | 492 | 1,450 | 4.5 | Bench and enlargement of | 159 | { 1,150* | 7.2* | Central Shaft headings | | { 906† | 5.7† | Central Shaft headings to | | | | Weehawken headings | 141 | 620 | 4.4 | ------------------------------+----------+----------+----------+ [* Actual advance.] [† Equivalent linear feet of full section tunnel.] The best month’s work in each location was as follows, the actual yardage excavated and paid for being reduced to equivalent linear feet of full section. The tunnels were generally taken out to full section, except for a small amount left in the bottom, which latter reduced the equivalent linear feet of full section to about 95% of the actual advance at the face. _Weehawken._-- Feet Linear per feet. day. Full timbered section, North Tunnel Nov., 1905, 87 = 3.0 Sandstone ” ” May, 1906, 109 = 3.9 Trap (normal) South ” July, 1907, 144 = 5.3 _Hackensack (All trap)._-- Feet Linear per feet. day. Portal to Central Shaft headings, South Tunnel May, 1907, 139 = 5.0 * Enlargement of headings, ” ” Nov., 1907, 175 = 6.0 Central Shaft headings to Weehawken headings, North Tunnel Apr., 1908, 145 = 5.2 [* The actual advance of the bench this month was 202 lin. ft.] _Central Shaft Headings._--During April, 1907, 122 lin. ft. of heading, averaging 3.8 cu. yd. per lin. ft., were taken out in the South Tunnel, west of the shaft. This was equal to 5.0 ft. per day for the 24 days worked. _The Best Week’s Work._--The best week’s work at either of the main working faces, when the full section was being excavated in trap rock, was 803 cu. yd., equal to 41.8 lin. ft. of full-section tunnel, or an average of 6.0 lin. ft. of full section per day; this was from the South Tunnel at Hackensack for the week ending January 11th, 1908.