From monthly bills as computed on the Demand Power Rate quantity discounts will be allowed, according to the size of the gross bill, as follows: The discounts shown above are based upon quantity, and are considered as a part of the rate schedule. An additional discount of 5% will be allowed after deducting the quantity discount for payment within discount days. Note. The foregoing schedule has been amended by adding two mills ($0.002) net per kilowatt hour, effective June 15, 1917. Telephone Service Telephone service can be obtained at reasonable cost from the telephone companies doing business within the District. It is probable that the contractor's construction cost for connections at the damsites will be only for the branch to his camp from the nearest company line, which is not far in any case. The service charge will probably be about $12 to $15 per month. Freight Service The railroads and electric lines reaching the various sections of work are shown on the general map. Railroad freight can be switched from the Cincinnati, Hamilton & Dayton Railroad to the Dayton, Covington & Piqua Electric Railway at West Milton; from the Cincinnati, Hamilton & Dayton Railroad to the Western Ohio Electric Railway at Wapakoneta; from the Cincinnati, Hamilton & Dayton Railroad to the Dayton & Troy Electric Railway at Tippecanoe City; from the Dayton & Troy Electric Railway to the Western Ohio Electric Railway at Piqua; and from the Cleveland, Cincinnati, Chicago & St. Louis Railway to the Ohio Electric Railway at Dwyer Station (south of Dayton). Source of Supply-Sand and Gravel for Concrete All of the sand and gravel deposits mentioned below, except the commercial pits, are owned and controlled by the District, and are available to the contractor to the extent necessary to his work. The limits of borrow pit areas are shown on the drawings. Germantown Dam.-Sand and gravel in sufficient quantity and of acceptable quality for the work at Germantown are found in the islands in Twin Creek, about 2,000 feet upstream from the dam. Near the south side of the creek the available supply is only a few feet deep, but on the north side borings penetrated to a depth of 20 feet without reaching the bottom of acceptable material. Separated upon the 4-inch mesh screen the proportion of gravel in the mixture is somewhat in excess of that of the sand. About two miles southeast of Germantown, with a siding connection to the Cincinnati Northern R. R., is a commercial gravel pit furnishing satisfactory washed and screened concrete aggregates. Englewood Dam.-Two distinct sand and gravel deposits occur in the vicinity of the Englewood damsite, one in the Stillwater River, downstream from the National Road and about 4,000 feet upstream from the dam, and the other in a small ridge about 2,000 feet upstream from the dam and 1,000 feet east of the river. The river deposit comprises an island about 1,200 feet long and 250 feet wide. Borings from 12 to 20 feet deep have not reached the bottom of acceptable material. Separated upon the 4-inch screen, the proportion of sand is somewhat greater than that of gravel. There is probably sufficient material here to satisfy the requirements. The bank deposit forms a narrow, winding ridge about 1,500 feet long and rising 15 or 20 feet above the surrounding river plain. Test pits and borings in this material show that more or less clay is mixed with the sand and gravel and indicate that thorough washing will be required. The proportion of sand is greatly in excess of that of gravel. Lockington Dam.-Two principal gravel deposits have been developed for the work at Lockington, one in the bed of Loramie Creek, extending about 1,000 feet upstream from the dam, and the other in the area adjacent to Mill Creek on the Bailey Farm, about half a mile north of the damsite. The Loramie Creek deposit averages about eight feet deep. While sufficient sand for concrete requirements may perhaps be obtained at this place, the amount of coarse aggregate will be insufficient. At Mill Creek the sand and gravel bed extends for a distance of at least 800 feet along the stream. This deposit contains sufficient material for the concrete requirements, but the proportion of fine aggregate, as separated on the 1/4-inch screen, is at least equal to that of the coarse aggregate. As more or less clay is distributed throughout the material, thorough washing will be necessary to produce sufficiently clean aggregates. Taylorsville Dam.-An ample supply of acceptable sand and gravel may be found in the river bed, extending downstream from the Taylorsville dam. Separated upon the 1/4-inch screen, the average of a number of samples shows the material to consist of sand and gravel in about equal proportions. Huffman Dam.-Acceptable sand and gravel in sufficient quantity are found in the areas of shallow flowage in the river bed west of the right-angle bend just upstream from the Huffman damsite. Analyses upon a 4-inch screen show the proportion of gravel to be somewhat in excess of the sand. Conduit Lining.-Coarse aggregate for special concrete required in conduit linings at dams (Item 42) cannot be obtained locally. Bids on similar material were received by the City of Dayton in November, 1916, from the following firms: Henkel & Sullivan, Cincinnati; Arabia Granite Co., Cincinnati; Harris Granite Quarries Co., Salisbury, N. C. Local Improvements.-Generally speaking, sand and gravel of suitable quality may be found within easy reach of the work at the various cities and towns where local channel improvements are contemplated. Stone for Stone Masonry, Rubble Paving, and Riprap It is possible that some stone for Item 48, Stone Masonry, Item 57, Dry Rubble Paving, and Item,58, Riprap, can be obtained from the best of the Brassfield limestone, a ledge deposit lying under comparatively shallow cover at the higher elevations near each of the damsites. For Item 57 some of the thickest of the hard limestone layers in the Cincinnatian formation may also be available. For Item 58, the harder boulders, where of sufficient size, will be acceptable. With these exceptions, all rock for the foregoing items must be obtained from quarries producing stone of acceptable quality, size, and shape. There are several such quarries in commercial operation within reasonable transportation distance by rail of the work and in addition, satisfactory ledges exist, not on property of the District, where the contractor can probably acquire quarrying privileges. Flood Warnings Within the limits of the drainage area there are about 30 U. S. Weather Bureau stations, and 17 river gages maintained by the District. Observers at all these stations send in reports promptly by telephone or telegraph, to the hydrographer of the District, whenever a rainfall of more than one inch in 24 hours occurs, or whenever there is any important change in river conditions. Thus the District keeps in close touch with the situation at all times and inasmuch as special attention and study have been given this subject, fairly accurate predictions of flood conditions can be made several hours in advance. It is the present intention to continue this service during the construction period, to collect and utilize promptly the best information obtainable as to flood conditions, and to make the predictions available to contractors upon request at any time. These predictions will cover not only the comparatively rare big floods, but also those of moderate size that might necessitate the protection of contractor's equipment located in the river bottoms. 4 5 6 and 6a 7 and 7a 8 and 8a 9 Trimming and shaping slopes of river channels Excavation, Class 1, for new channels and channel improve- Excavation, Class 3, for same Excavation, Class 1, for river channel improvements 10 Excavation, Class 2, for same Excavation-Overhaul for river channel improvements 11 Excavation, Class 3, for same 12 13 14 Excavation, Class 2, for same Excavation, Class 1, for outlet works and spillways at dams 15 Excavation, Class 3, for same 16 Excavation, Class 1, for minor drainage systems 17 Excavation, Class 2, for same 18 Excavation, Class 3, for same 19 Excavation, Class 1, for street and highway cuts and fills 20 Excavation, Class 2, for same 22 and 22a Excavation, Class 1, for retaining walls, and bridge piers, ana flood gate structures, except at dams 23 and 23a 24 and 24a 25 and 25a 26 and 26a 27 and 27a 28 29 Excavation, Class 2, for same Excavation, Class 3, for same Excavation, Class 1, and backfilling for trenches Excavation, Class 2, miscellaneous 30 Excavation, Class 3, miscellaneous Embankment, Class A, for main dams constructed by hydraulic monitor and dredge pump method Embankment, Class B, for main dams constructed by semi hydraulic method Embankment, Class, C, for main dams constructed by sprinkling and rolling method 31 32 33 34 35 36 37 Backfilling Embankment, Class D, for levees built from material taken from river channel excavation Embankment, Class E, for levees built from materials taken from borrow pits Embankment, Class F, miscellaneous 41 and 41a Concrete in outlet works, spillways, retaining walls, bridge 43 and 43a Conrete in aprons, paving at dams, and similar flat shapes |