APPENDIX Q Q. IMPROVEMENT OF RIVERS AND HARBORS IN THE OSWEGO, NEW YORK, DISTRICT. REPORT OF COL. W. L. FISK, CORPS OF ENGINEERS, OFFICER IN CHARGE, FOR THE FISCAL YEAR ENDING JUNE 30, 1909. At the beginning of the fiscal year the work of reconstructing crib substructure and replacing the timber superstructure with concrete was underway with hired labor, the work being carried on in the manner described on page 1942, Report of the Chief of Engineers for 1906. Work was continued in 1908 to December 24, and then suspended for the winter. During the season of 1908 four cribs, each 100 feet long, and one crib 60 feet long, were built and sunk in the east pier. Concrete superstructure was built on 501 feet of cribs sunk in the east pier during the season of 1907 and on 310 feet of cribs sunk in 1908, making a total of 811 feet of new concrete superstructure made in the east pier in 1908. 58 feet of timber superstructure were torn out of the west pier under the fog signal house and replaced with concrete superstructure. The cost per linear foot of tearing out old cribs and superstructure and replacing with new cribs with concrete superstructure was $58.90. This cost includes repairs and upkeep of plant, but nothing for depreciation. The total number of cubic yards of concrete made was 2,118.75, and the cost of concrete was $6.26 per cubic yard. |