Date. Number of contract. Expenditures for repair of contract-work under section 9 of the original contracts-Continued. Sept. 8, 1873 890 Chas.E.Evans, president Evans Concrete Co. Sureties: Charles E. Evans, Martha W. Evans. tension. Lay Evans concrete pavement on car- B st., bet. N. J. ave. and 2d $3 20 riage-way. Do. Aug.13, 1875 890* Commissioners' ex- Repair concrete pavement Commissioners' exChas. E. Evans, president Evans Concrete Co. Sureties: Charles E. Evans, Martha W. Evans. Construct 12-inch-pipe sewer, with Repair the concrete pavement.. Aug. 13, 1875 914 Commissioners' ex- Resurface and repair concrete pave tension. ment. $20, 757 18 *B street only. Not mentioned in written contract. VIII. APPENDIX No. 10.-BOARD RATES. These are the rates at which work has been done by the Commissioners under contracts and extensions of the board of public works, the medium of payment being District 3.65 bonds. In the consideration of the question of these rates of the late board of public works, the printed evidence taken before the joint investigating committee of the Fortythird Congress, as well as the record of the action of the board of public works, in general and in particular cases, have been examined. The result is given in the following table, which gives the board rates as they have been ascertained and adhered to in the engineer's office: All include a haul of 200 feet, and for every 100 feet over the first 200 feet....do.. per ca. yard. .do.. 28 do 1.00 This price has been allowed when contractors have furnished the gravel at their own expense, or obtained the material from excavation, where they were obliged to handle it twice. Where gravel was hauled long distances, the rates for excavation and haul have been allowed, based upon the actual amount of gravel handled. Where obtained and paid for in excavation in one street and hauled upon another, no additional compensation has been given. Furnishing and laying 6-inch straight Include two feet of grading. Twelve feet of 6-inch blue-stone curb and coping equal 1 cubic yard; 14 feet of 5inch blue-stone curb and coping equal 1 cubic yard; 24 feet of 4 x 16 inch blue-stone curb and coping equal 1 cubic yard; 24 feet of bridge stone equal 1 cubic yard; 32 feet of 12-inch gutter-stone equal 1 cubic yard; 10 feet of 6-inch granite curb equal 1 cubic yard; 12 feet of 5-inch granite curb, equal 1 cubic yard; 6 square yards of blue or rubble pavement equal 1 cubic yard; 9 square yards of cobble pavement equal 1 cubic yard; 500 or 14 square yards equal 1 cubic yard. This haul is allowed only when old material is moved from line of street to property-yard. In the manuscript of my report of November 30, 1875, was given a summary of main sewer rates, which should have appeared on page 373 of the printed report of the Commissioners of December 1, 1875, but which was, through some inadvertence, omitted. It is contained in this table. MAIN SEWER RATES. First. The cost of the work as obtained by a detailed estimate of its excavation and masonry, viz: Rates for bricks, per M... Rates for stone, per perch.... Rates for excavation, for 16 feet deep and less. per cubic yard.. and for all over 16 feet deep, per cubic yard.. Rates for shoring, per linear foot $23 00 6 50 40 77 1 08 Second. An addition of 15 per centum for contingencies. Third. A further addition of 15 per centum on account of the manner of payment. The following are the bids upon which cash contracts were awarded by the Commissioners, after due notice by advertisement, and are considerably lower than the average of all bids received. It will be seen that they are generally in excess of the board rates: Equivalent in cash at 70 cents. |