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16 TRE MarINE KEVIEW Modern Ore Handling Machinery.--IIl. A late installation of ore handling machinery designed by Hoover & Ma- son, of Chicago, is at the new ore and coal dock of the Pennsylvania rail- road at Ashtabula harbor, on the southern shore of Lake Erie. The Pennsylvania company's dock is _ lo- cated on the west bank of the Ashta- bula river, on a tract of land which was reclaimed for this purpose from an area which was completely under water at the mouth of the river. Some idea of the great extent of this im- BY WALTER G, STEPHAN. A good general view of the entire plant is given in Fig. 1, showing the unloaders and ore bridge in their po- sitions relative to the ore yard, which is so arranged that cars can be con- veniently supplied to the unloaders or car dumpers as desired with as lit- tle handling as possible. The tracks for loaded and empty cars are all made long enough to take an entire train, and the car dumpers are sup- plied with cars by gravity from a yard which is slightly elevated above upon 12x12-inch timber cribbing un- derneath. The rear legs run on dou- ble rail tracks laid on top of a con- crete wall which forms the water side of a V-shaped trough extending under- neath the cantilevers of the unloaders and the rehandling bridge for a dis- tance of 800 feet. The construction of this trough is interesting and is well illustrated in Fig. 3, which shows it in the process of making. The trough is built between two solid concrete walls about 35 feet center .to center FIG. _---GENERAL VIEW OF ORE AND COAL HANDLING PLANT provement can be obtained from the fact that the reclaimed area is about one-third of a mile long by 750 feet wide, and that over 2,000 feet of new dock was constructed. The new ore handling machinery consists of six Hoover & Mason ore unloaders 'and one Hoover & Mason ore bridge. In addition to these, a complete new power house and one additional Mc- Myler coal car dumper were installed, the latter being capable of dumping the largest coal cars directly into the hold of a boat. the other tracks. From the dumpers the empty cars are carried by a switch- back to another storage yard, from which they can be switched either to the main incoming track or to the ore unloaders beyond, or the empty cars can be dropped by gravity direct- ly to the unloaders. THE ORE UNLOADERS. The ore unloaders are carried on front and rear legs, as shown in Fig. 2. 'The front legs travel on double ci) teacks laid on top of. the ~solid concrete face of the dock, which rests OF THE PENNSYLVANIA RAILROAD ALT ASHTABULA HARBOR, 0. at the top, and: the depth of the V is 17 feet in round figures, the bottom being rounded to a radius of about 3 feet 6 inches. As a protection from the steel scoops of the bucket, six standard T rails are imbedded in the concrete bottom, as shown in the sec- tional elevation, Fig. 4, the rails run- ning longitudinally and being spliced with standard splice bars. The trough proper is made of a shell of concrete about 18 inches thick, except at the bottom, where the thickness was in- creased to 24 inches, and between this