94 THE KANSAS CITY BRIDGE.

One smaller flat boat, with hole through the centre for boring, and used
also for stone.

Two small barges, about 50 feet long, purchased at Kansas City, and
rebuilt for use on the bridge. |

Three flat boats with square bows, two of them 20 by 53 feet, and the
other 22 by 64 feet. Two of them were fitted out as floating derricks,* and the
third was used for pile-driving.

One small scow, housed, and used as a diving boat.

A large yawl, with a crew of seven men, and a skiff manned by two men,
were also kept on the river ; a few other skiffs were generally in use on various
parts of the works, and two small flats, which could easily be towed by the
yawl, were used as sand boats. One of the large flats sunk in the spring of
1868 when heavily loaded with stone, and was lost ; the other six were rebuilt
after the completion of the bridge ; their decks were raised, and they were con-
verted into pontoons, to be anchored in a line above Pier No. 1, where they
should serve as a protection for steamboats passing down through the draw.t

The principal items in the remaining equipment were :—

Four portable steam-engines, of 8, 12,15 and 25 horse-power respectively ;
one of these was employed to drive the machinery in the shop.

One nine-inch Alden centrifugal pump.

One No. 4 Andrews centrifugal force-pump, four inch discharge, and six
inch supply pipes, with flexible hose.

One six-inch steam siphon pump.

- One donkey pump, used for jetting.

One air-pump, diving-dress and outfit complete.

Four large dredges, with attachments.

One small dredge.

Three pile-drivers, with 2,200 pourd hammers.

Hight land derricks, with rigging complete, and horse-powers.

One sawing-machine, for cutting off piles under water.

* Plate VILL
+ The Pontoon Protection is shown on Plate IL; the dotted lines on the plan indicate the position of
the floats at high water.