Dams and Control Works: A Description of Representative Storage and Diversion Dams and High-pressure Reservoir Outlet Works Constructed by the |
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... heads involved and in the large volumes required by the irrigation demand . A description of the more notable of such installations may be found in " High Pressure Reservoir Outlets , " by J. M. Gaylord , formerly chief electrical ...
... heads involved and in the large volumes required by the irrigation demand . A description of the more notable of such installations may be found in " High Pressure Reservoir Outlets , " by J. M. Gaylord , formerly chief electrical ...
Page 3
... heads through these sluiceways at a velocity as low as 1 foot per second . All of the sand and a great deal of the silt held in suspension is dropped . The clarified water in the sluiceway is then skimmed off for irrigation purposes ...
... heads through these sluiceways at a velocity as low as 1 foot per second . All of the sand and a great deal of the silt held in suspension is dropped . The clarified water in the sluiceway is then skimmed off for irrigation purposes ...
Page 6
... head gate of the same size as the others supplies water to a small ditch . The Taintor gates and the west head gates are all operated by one gasoline engine of 8 horsepower . The dam will raise the level of the water about 6 feet above ...
... head gate of the same size as the others supplies water to a small ditch . The Taintor gates and the west head gates are all operated by one gasoline engine of 8 horsepower . The dam will raise the level of the water about 6 feet above ...
Page 7
... head at five points under the dam . The material under the Percha Dam is a medium coarse sand with a small amount of gravel for a depth At each site it was necessary first to build a tem- porary pile bridge across the river . The one at ...
... head at five points under the dam . The material under the Percha Dam is a medium coarse sand with a small amount of gravel for a depth At each site it was necessary first to build a tem- porary pile bridge across the river . The one at ...
Page 8
... . On the west is the canal intake controlled by nine regulator gates , each 7 feet square . These gates are operated by a line shaft installed on the head - wall This high water caused great concern for the safety of. 8 Colorado River.
... . On the west is the canal intake controlled by nine regulator gates , each 7 feet square . These gates are operated by a line shaft installed on the head - wall This high water caused great concern for the safety of. 8 Colorado River.
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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 cent channel clay 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 foundation furnished Government gravel grout holes hauling hoist Illus included installed irrigation located material maximum ment metal miles North Platte project operation outlet Owyhee Dam paint paragraph Pathfinder Dam penstock pipe pits placed plant portion pressure grouting railroad reservoir riprap river rock fill roller sand schedule second-feet shaft shown side slope sluice sluiceway solid rock specifications spillway storage stream bed structure suitable surface thickness timber 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 149 - 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 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.
Page 139 - ... and in lieu thereof the contractor shall pay to the Government as fixed, agreed, and liquidated damages for each calendar day of delay until the work is completed or accepted the amount as set forth in the specifications...