2 Consumer's rates: Lighting 5.5 to 7 cents per kw. hr.; heating $1 to $2.50 per month per 1,000 watts capacity; power 0.55 to 6 cents per kw. hr. plus 50 to 75 cents per month First 50 hours' use of maximum demand. Above rates increase 25 per cent during June, July, and August. Above rates subject to following discounts: For maximum demand of 2 kilowatts and less than 4 kilowatts. Per kw. h $0.04 30 Minimum payment shall not be less than $1.80 per month per kilowatt of the contractor's agreed maximum demand. All above rates subject to 10 per cent discount if energy is delivered and metered at approximately 2,200 or more volts or 8 per cent if delivered at approximately 2,200 or more volts and metered at a lower voltage. 6 Consumer's rates: Lighting 10 cents per kw. hr. less 10 per cent for cash; heating and cooking 3 cents per kw. hr.; power 2.5 to 3.5 cents per kw. hr. 7 Consumer's rates: Lighting 8 cents for first 10 kw. hr.; 6 cents for all over that amount; power 3 cents per kw. hr. Consumer's rates: Lighting 10 cents per kw. hr. less 10 per cent for cash. Consumer's rates: Residences 5 to 15 cents per kw. hr.; power 2 to 6 cents per kw. hr. 10 Consumer's rates: Lighting 10 cents per kw. hr.; cooking 4 cents per kw. hr. UNDEVELOPED POWER. In the following table are listed the power sites which have been investigated more or less completely by the Reclamation Service but which have not been developed. The data given are necessarily in many cases only roughly approximate, but the table serves to indicate the great power possibilities of the projects. ELECTRICAL AND MECHANICAL ENGINEERING. The following is a general report of the work accomplished by the electrical division of the Denver office during the fiscal year ending June 30, 1916: Arizona, Salt River project.-The Crosscut power plant near Tempe, Ariz., was completed and the official capacity and efficiency tests were made in January, 1916. In this plant are installed six vertical impulse wheels, each of 1,000-horsepower capacity operating under a head of 117 feet. The water wheels have a guaranteed efficiency of 75 per cent at 1,000-horsepower capacity and under test developed a maximum efficiency of over 79 per cent. All of the difficulties met with in the construction of this plant have been overcome successfully and it is now in continuous and satisfactory operation. So little trouble is encountered in the operation of this plant that a crew of five men, including the chief and one janitor, have no difficulty in operating the plant. At the Roosevelt power house a connection between the sluicing tunnel and the 7-foot penstock was designed and material purchased. This connection will make it possible to operate units Nos. 1, 2, and 3 on clear water from the reservoir and will make it unnecessary, for the present at least, to repair the power canal and its diversion dam which were seriously damaged in the floods of January, 1916. The two regulating needle valves to be used at the end of the sluicing tunnel in conjunction with this installation were delivered but have not been installed. The condition of the north outlet at the Roosevelt Dam was given careful study and tentative designs of supplemental valves for the control of this outlet were prepared and submitted to a board of engineers which convened at Roosevelt June 20, 1916. The installation of the sixth generating unit at the Roosevelt power house with a capacity of 5,000 kv-a. was completed and the unit placed in operation. This raises the capacity of the Roosevelt plant from 5,500 to 10,500 kv-a. The operation of this unit has proven very satisfactory and the addition of this large generator to the system has been very beneficial to the service rendered to various customers receiving power. Arizona-California, Yuma project.-Preliminary studies of the proposed Yuma Mesa pumping plant operated by power developed at the drop in the main canal were made and estimates of the cost of this system were partially completed. The design of a drainage pumping plant to be operated by internal combustion engines was also under consideration. Colorado, Grand Valley project.-Electric equipment consisting of a gasoline-driven generator, storage battery, motors, and controllers, for the operation of the rolling crest of the Grand River diversion dam, was purchased and installed. The apparatus is designed to raise the crest at any speed desired by the operator and to safeguard the mechanism by dynamic braking while lowering. Idaho, Boise project.-The Boise River power plant which has supplied power for the construction of the Arrowrock Dam was leased for a term of five years to the Electric Investment Company of Boise, this lease taking effect July 1, 1916. The 20 balanced valves installed at the Arrowrock Dam have now been in successful operation for two years and inspection of the outlets shows that they are still in perfect condition. Idaho, Minidoka project.-The Boersch Lake drainage pumping plant, consisting of two 25-second-feet vertical pumps, was completed and placed in operation. The 114 pumping plant near Acequia was installed and placed in operation. This plant has a capacity of 4 second-feet at 9 feet lift and consists of a centrifugal pump geared to an induction motor. In connection with this plant an outdoor substation consisting of a transformer and switches mounted on a steel tower was installed near the 30,000-volt transmission line at Acequia. A similar substation was installed for delivering a small amount of power to consumers at Marshfield. A contract for delivering power to the town of Albion was consummated and transmission line and substation constructed. The contract for delivery of power to the city of Burley was rewritten and the amount of power to be delivered increased from 1,500 to 2,500 kilowatts. The new contract provides for the installation of 1,200kilowatt transformer capacity in the Government substation, these transformers to be furnished by the city and paid for in power. Propositions were received from the Mountain States Telephone Co. for the purchase of the project telephone lines and from the Minidoka Mutual Telephone Co. for the lease of the telephone lines north of the river. Both of these propositions were rejected. Montana, Huntley project. The capacity of the direct pumping units at the Ballantine pumping plant was increased approximately 10 per cent by the purchase and installation of new turbine runners and gates. Nevada, Truckee-Carson project. The third unit installed at the Lahonton power plant by the Canyon Power Co., now operating this plant under lease, was tested and accepted on the part of the Reclamation Service. New Mexico, Rio Grande project, Elephant Butte storage.-The hydroelectric plant consisting of a 150-kilowatt generator connected to a 225-horsepower spiral-flume turbine was installed and placed in operation. This plant was operated to relieve the steam plant during the latter part of construction and will be used for lighting the dam and supplying various motors required in connection with the operation of the control valves. A metal spraying pistol was leased from the Metals Coating Co. of America and experiments are being made in the repair of erosion by this means. The operation of the balanced valves for the Elephant Butte Dam was studied and tentative designs prepared for the correction of certain difficulties which developed with these outlets. Such difficulties have not yet become of sufficient importance to warrant any change in the present method of operation. North Dakota, North Dakota pumping project.-Assistance was given in negotiating a revision of the commercial power contract with the city of Williston, and in an attempt to revive the operation of this project for the season of 1916. Oregon, Klamath project. The lease of the Keno Canal for power purposes was considered and a draft of specifications prepared and submitted to the project manager for consideration. An estimate of a direct pumping plant for the Pine Grove irrigation district was prepared. Utah, Strawberry Valley project.-The question of the future operation of the Strawberry Valley power plant was considered at a board meeting on February 12, 1916, and specifications for lease of the plant were prepared and issued. Washington, Okanogan project. The power and pumping system for the irrigation of Robinson Flat was tried out and the turbines at the two power plants tested. The turbine at plant No. 1 developed an efficiency considerably in excess of the guaranties, but No. 2 turbine was somewhat deficient in capacity. A new runner has been furnished by the contractor and will be tested during the summer of 1916. A surge pipe has been installed near the Robinson Flat pumping plant to eliminate the effect of water hammer in the long delivery pipe. Washington, Yakima project, Sunnyside unit. The Snipes Mountain pumping plant was put in operation at the beginning of the season of 1915, but its operation is not yet entirely satisfactory. Plans and specifications for the Grandview power and pumping plants were prepared and bids were received for all construction work in connection with this project before the end of the fiscal year. No contracts were let, as the irrigation district had not at that time fulfilled the necessary legal requirements. The Outlook directpumping plant was placed in operation at the beginning of the irrigation season of 1916, and preliminary efficiency and capacity tests were made. Wyoming, Shoshone project. The two balanced valves installed at the Shoshone Dam were tried out for the first time in May, 1916, and operated with entire satisfaction. General. The electrical department was transferred from Los Angeles to Denver and consolidated with the office of the chief of construction, July 15, 1915. In addition to the work above outlined, this division has provided inspection for material and equipment purchased in Denver and vicinity. One of the functions of this department is to assist the purchasing department in all electrical or mechanical purchases. It also has general supervision over the operation of the power and pumping plants and the design of mechanical and electrical devices of the service, CEMENT-TESTING WORK. The amount of cement for which tests were made during the fiscal year ending June 30, 1916, was 171,213 barrels, of which 168,213 barrels were accepted and 3,000 barrels rejected. The following table shows the number of barrels for which tests have been made, and the amount and per cent accepted, from 1904, when the testing laboratory was opened, to June 30, 1916: |