TABLE 10.-Performance of steam shovels, Pacific terminals, July 1, 1914, to June 30,

TABLE 11.-Reinforcing and fixed steel used, Pacific terminals, July 1, 1914, to June 30,

TABLE 12.-Fixed steel used, Pacific terminals, July 1, 1914, to June 30, 1915.

TABLE 13.- Reinforcing steel used, Pacific terminals, July 1, 1914, to June 30, 1915.

55,638 27,951 30,922 35,580 41,459 179,112 231,537 104,929

160, 678 1,269,307

TABLE 16.-Trestle built, Pacific terminals, July 1, 1914, to June 30, 1915.

TABLE 17.- Work done at Ancon quarry, Pacific terminals, July 1, 1914, to June 30,

TABLE 18.-Material placed (Naos Breakwater), Pacific terminals, July 1, 1914, to June

30,

19,980

April..

720

704

June (tracks).

1,308

200

1,400

ATLANTIC TERMINALS.

CRISTOBAL COALING PLANT.

During the year Superintendent W. G. Thompson has continued in immediate charge of this work, including all construction, field engineering, and the inspection of contract work. Junior Engineer R. A. Wilson has continued in charge of field engineering. Junior Engineer E. C. Smith, jr., has been inspector of steelwork since January 1, 1915, and Assistant Engineer Bernard Duchscher has been mechanical inspector since May 12, 1915.

General. During the year the dredging division completed the excavation of the subaqueous coal pocket to elevation - 28.0. The coral sand and rock was pumped ashore and used as backfill. The total material dredged for the coaling station was 188,667 cubic yards.

Some additional dredging was done in the slip west of reloader wharf and in the channel north of the plant.

Two lines of trestle were driven for placing caisson foundations under the reloader wharf; one line was driven on the unloader wharf; and guide piles in rows and capped with heavy timbers were driven for the end-wharf caissons. Caisson foundations for the south 500 feet of unloader wharf were completed on January 1, 1915. This portion of the work was given preference to permit the early erection of the unloader towers. Caisson foundations for the entire unloader wharf were completed on June 4, 1915, and for the entire reloader wharf on June 15. Work on caissons for the end wharf commenced on June 5, 1915, and on June 30, 8 out of 31 caissons had been completed. These caissons are all 6-foot cylinders of one-half or threeeighths inch steel plate, and riveted in lengths of from 10 to 50 feet, depending on the depth of water. They were set in position and driven to hard rock with a heavy steam hammer, through from 40 to 80 feet of coral rock, sand, and clay, and after being excavated and reinforced with steel rails, were filled with concrete.

The steel deck was erected by contract. At the end of the year the deck steel for the unloader wharf had been erected and riveted, and that for the reloader wharf had been 98 per cent completed. No deck steel had been erected for the end wharf. Total weight of the deck steel is 5,487 tons. The south 520 feet of the reinforced-concrete floor of both unloader and reloader wharves was completed at the end of the year; thus 1,040 linear feet of wharf structure was entirely completed, except for the installation of the wooden fender system and the cast-iron snubbing posts. The concrete retaining walls south of the coaling pier which carry the stocking and reclaiming bridges were completed except for concreting in the permanent tracks. The foundations for the transformer house and for the viaduct trestle south of the wharves were completed. Ninety per cent of all permanent railroad tracks south of the wharves are in their permanent position, and require only a small amount of ballasting. An embankment, having its center approximately on the center line of the wharf and its top at elevation - 4.0, is being made under each wharf by pumping in coral rock with a suction dredge working in the reloader slip. On top of this fill hard rock from Sosa Hill is being dumped to elevation +2.0, so as to cut off the sea from the coal pile. By this embankment the coal will be effectually retained and protected. The east shore of the coaling station south of the unloader wharf was riprapped with hard rock from Sosa Hill. All fill necessary to complete the coaling plant south of the wharves was completed during the

year.

Stocking and reclaiming bridges, reloader towers, viaduct, etc. (W. O. 40483). The erection of the two 315-foot stocking and reclaiming bridges which span the coal-storage area was commenced by the subcontractor in November, 1914. At the end of the fiscal year both bridges had been completed, except for the installation of the propelling machinery. All viaduct trestle south of the wharves and 500 feet of trestle on south end of the reloader wharf were completed, except for the installation of crossties and rails. The transformer house was about 75 per cent completed.

Foundations for the track scales were completed by The Panama Canal. Some structural material for the four reloader towers arrived