The records of the work have been based largely on the reports of the
day and night inspectors, which were made out on regular forms.
A daily report card was made out each morning and forwarded to the
office of the chief engineer. It covered the work done for the previous
24 hours, up to 6 o'clock each morning.
A telephone report was made to the resident engineer by the inspectors
each day at 8.30 A.M., giving the conditions, number of men, etc., at
the opening of the day's work.
A daily progress profile, on 10 by 10 to the inch cross-section paper,
covering the whole length of the tunnels, was kept in the office of the
resident engineer. This was mounted in sections, on a piece of
composition board, and hung on the wall for convenient reference. The
information, showing the progress up to 6 o'clock each morning, was
shown on the report of the night inspector, and was plotted on this
profile at 7 o'clock each morning. The plotting was left in pencil, and
each month's work was colored in. A progress profile was taken by the
men of the alignment corps each Saturday morning and plotted by them,
alternate weeks being in red and blue ink on the same profile.
A chart showing the number of drills working, time worked, blasting
periods, etc. (Plate XXIII), was plotted each morning and was extremely
useful, not only in keeping in touch with the work, but in compiling
many of the statistics used in the preparation of this paper. These
cross-section sheets were ruled 12 by 12 to the inch, thus giving one
space per hour horizontally. In the top vertical space are shown the
heading drills, their time of stopping and starting, and their number,
each heavy line representing one drill. In the next space below are
shown the drills on the bench, lift holes, etc.
The blasting time is shown by the portion hatched (shown in red on the
original), which covers the whole vertical space when a complete round
of both heading and bench is blasted, and only part, top or bottom, as
the case might be, if only one or the other. The number of drillers and
muckers at the main working face is shown, and below that (in red ink on
the original) the number of cubic yards handled each shift. The time the
shovel is working is shown by the heavy line filling a whole space; and
the air pressure, platted from the recording gauge charts, is shown in
the space below.
A combination daily and weekly report, showing the total number of men
working on each section, and the number of cubic yards excavated, was
entered every day and kept on a filing board in the office of the
resident engineer, and a copy was sent to the main office at the end of
the week, with such notes on the back as might be necessary, or of
interest.
A report was made out weekly and sent to the contractor's
superintendent, showing any deviations from grade, any tight places, and
the station of bench and headings.
A monthly report was made to the chief engineer, giving detailed
statistics of the amount of work done, etc., plant installed, and short
notes of any matter of interest affecting the work in any way.