THE KANSAS CITY BRIDGE. 30

at which the several foundations were ready for the masonry, were as fol-
lows :

Pier No 1, Water Deadener sunk ........ Aug. 16,1867. Masonry begun ..Oct. 16, 1867.
“2, Caisson launched............. Sept. 23, 1868. «6 ‘6 ..Feb. 20, 1869.
“8, First Pile driven in False Works Aug. 27, 1867. “ “ ..May 20, 1868.
“« 4, “ s “ “« Sept. 2, 1867. “ “ ..April 2, 1869.
“5, Erection of Caisson begun ......Jan. 20, 1868. “ “ ..dan. 14, 1869.
“ 6, First Sheet Pile driven........ Sept. 3, 1867. “ “ ..dan. 3, 1868.
“4, First Pile driven.............. Feb. 27, 1867. “6 « ..Oct. 1, 1867.

These dates do not in themselves give a correct idea of the time actually
consumed in putting in the substructure of the piers; the work on some of
them was more than once suspended, either on account of the season or to
accommodate other work which had momentarily become of greater impor-
tance. After the caisson had been built at the site of Pier No. 5, it was left
standing for two months, until machinery could be spared to sink it. At Pier
No. 4, the first set of works was entirely destroyed in the spring of 1868, in
consequence of which the site of the pier had to be changed, a new plan of
foundation prepared, and the first pile in the new false works was not driven
till the 9th day of August, 1868 ; moreover, the date given above as that at
which the masonry of this pier was begun, is in reality that at which the laying
of masonry was resumed after the completion of the foundation and the
removal of the upper false works ; the bulk of the subaqueous masonry here was
put in during the process of founding. In the cases of Piers] and 2, the caissons
were built on shore, and the time occupied in the foundations, including this
preparation, was therefore greater than the table indicates.

A correct idea of the time occupied in the different foundations, as well as
of the characteristic features of the several plans, can only be given by separate
narratives of the substructure operations at each of the seven pier sites.

PIER No. 1.

This pier is situated on the south side of the main steamboat channel, and at
ordinary stages of water it stands about 100 feet from the shore line. The bed
rock was found at an elevation of 84, or 13 feet below the extreme low-water