A.-Abstract of contracts for improving the Illinois River in force during the fiscal year ending June 30, 1876. $2.00 Remarks. 80 15 B.-Table showing the stage of water in the Illinois River during the fiscal year ending June 30, 1876, at Naples and points on the work extending 40 miles below. C.-Statement showing cost, &c., of dams and jetties constructed during the fiscal year ending June 30, 1875 and 1876, for the improvement of the Illinois River. To accompany report of Col. J. N. Macomb, Corps of Engineers, U. S. A., for fiscal year ending June 30, 1876. Date of construction. Mean dimensions. Number of cubic yards. Cost per cubic yard. Depth. Brush and stone. Earth. Feet. Feet. Feet. 1874. October. French Bar $460 37 167. 2 167.2 $2 75 $2.75 1874, '75.. September, Oc .do 7,000 150 3.0 60,000 60, 000 tober, and No vember. 110 4.5 48, 500 48, 500 Total. Brush and stone. Earth. Total. Cost per linear foot. Remarks. Some 7,000 linear feet of earth-dike built with dredged material. 83 64.7 Built with piling, brush, and stone, backed with dredged material. Some 800 linear feet of earth-dike Sugar Creek Island Chute closed and 2 00. 6 Cross-dam and training-wall built with piling, brush, and stone, backed with dredged material. 2 24 About 2,660 linear feet of earth-dike Chute closed by dam built with pil- About 500 feet of earth-dike built 3 27. 2 Chute closed by dam built with piling, brush, and stone, backed by dredged material. *74 72.7 3.43 Some 1,100 linear feet of earth-dike built with dredged material, riprapped with stone. Some 2,600 linear feet of earth-dike built with dredged material. Built of piling, brush, and stone; No. 2 backed with earth cast up by dredge. C.-Statement showing cost, &c., of dams and jetties constructed during the fiscal year endind June 20, 1875 and 1876.-Continued. Date of construction. Mean dimensions. Number of cubic yards. Cost per cubic yard. * Stone. Base. Depth. Brush and stone. Earth. Total. Brush and stone. Earth. Total. Cost per linear food. 7,583 7, 583 95.7 Remarks. |