Dams and Control WorksU.S. Government Printing Office, 1929 - Dams A description of representative storage and diversion dams and high-pressure reservoir outlet works constructed by the Bureau of Reclamtion. |
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Common terms and phrases
American Falls Dam arch Arrowrock Arrowrock Dam back fill balanced needle valves bars Boise project borrow pits built Bureau of Reclamation buttresses canyon cement channel clay cobbles cofferdams completed conduit construction contracting officer contraction joints contractor core wall cost Creek crest crete cubic yards cut-off trench depth discharge drainage drains drawings drilled earth elevation embankment emergency gate engineer excavation fault zone feet foundation furnished gallery Government gravel grout holes hauling hoist Illus included installed irrigation located material maximum ment metal miles North Platte project operation Owyhee Dam paint paragraph Pathfinder Dam penstock pipe pits placed plant portion pounds pressure grouting railroad reservoir riprap river roller sand schedule second-feet shaft shown side slope sluiceway solid rock specifications spillway storage stream bed structure suitable surface thickness timbering tion tracting officer Trash Rack unit prices bid upstream face vertical Weber River
Popular passages
Page 149 - In freezing weather suitable means shall be provided for maintaining the concrete at a temperature of at least 50° F. for not less than 72 hours, after placing, or until the concrete has thoroughly hardened.
Page 141 - ... Contracting Officer may withhold approval of progress payments until the Contractor submits the required schedule. (b) The Contractor shall enter the actual progress on the chart as directed by the Contracting Officer, and upon doing so shall immediately deliver three copies of the annotated schedule to the Contracting Officer. If, In the opinion of the Contracting Officer, the Contractor falls behind the approved schedule, the Contractor shall take steps necessary to improve its progress, including...
Page 148 - Fine aggregate shall consist of sand, stone screenings, or other inert materials with similar characteristics, or a combination thereof, having clean, hard, strong, durable, uncoated grains and free from injurious amounts of dust, lumps, soft or flaky particles, shale, alkali, organic matter, loam or other deleterious substances.
Page 150 - ... shall be included in the unit prices bid in the schedule for the concrete on which the forms are used.
Page 128 - The mixes will be based upon securing concrete having suitable workability, density, and impermeability, and required strengths, without the use of an excessive amount of cement, and using, in so far as practicable, the entire yield of suitable materials from the natural deposits from which the concrete aggregates are obtained. If, in the opinion of the contracting officer, it is impracticable to utilize in the concrete...
Page 147 - ... well mixed and brought to a proper consistency. The exact proportions in which these materials are to be used for different parts of the work shall be as determined by the contracting officer from time to time during the progress of the work, and as analyses and tests are made of samples of the aggregates and the resulting concrete. In general, the proportions shall be determined by the contracting officer to produce concrete of maximum practical economy to the Government and having an ultimate...
Page 129 - Fahr. for not less than 72 hours after placing, or until the concrete has thoroughly hardened. The methods of heating the materials and protecting the concrete shall be approved by the Engineer.
Page 139 - ... liquidated damages. — The damages that may result from any delay in completion of the work by the time agreed upon will be difficult, if not impossible, of ascertainment. If the work is not completed on or before the date fixed for its completion by the terms of the contract...
Page 142 - ... shall be included in the lump-sum price bid In the schedule for diversion and care of river during construction and unwaterlng foundations.
Page 129 - Whenever required, forms shall be wetted thoroughly just before placing concrete, so as to prevent injurious drying of the surface of the concrete by absorption. Where forms are placed in successive units for continuous surfaces, care shall be exercised to fit the forms tightly over completed surfaces so as to prevent leakage from the concrete.