These 940 days include practically all the time elapsed, except Sundays and such few holidays as were observed. For some of this time, work was being carried on at only one or two points; the time, therefore, represents practically the total possible working time during the period covered.
[Progress at Weehawken.]—At Weehawken the total number of days worked was 763, divided as follows:
186 days in timbered section, about 426 ft., an average rate of 2.3 ft. per day in each tunnel;
176 days in hard sandstone, about 563 ft., an average rate of 3.2 ft. per day in each tunnel;
112 days in hard trap, about 267 ft., an average rate of 2.4 ft. per day in each tunnel;
289 days in ordinary trap, about 1,316 ft., an average rate of 4.55 ft. per day in each tunnel.
[Progress at Central Shaft.]—At Central Shaft the average length driven per day in each of the four headings is shown by Table 4.
[TABLE 4.]
| Location. | Number of days worked. | Total length of heading, in feet. | Average length of heading driven per day worked, in feet. |
| N.E. | 227 | 446 | 1.96 |
| S.E. | 168 | 346 | 2.06 |
| N.W. | 272 | 768 | 2.82 |
| S.W. | 234 | 698 | 2.98 |
[Progress at Hackensack.]—At Hackensack the total number of days worked on the tunnels proper, all in trap rock (omitting the cut and cover) was about 792, divided as shown in Table 5.