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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Page 21
... . The power outlet is closed at present by a timber bulk- head . It will ultimately be controlled by a 5.6 by 7 foot cast - iron slide gate . Transverse contraction joints , fitted with keyways 24 inches wide. DAMS AND CONTROL WORKS 21.
... . The power outlet is closed at present by a timber bulk- head . It will ultimately be controlled by a 5.6 by 7 foot cast - iron slide gate . Transverse contraction joints , fitted with keyways 24 inches wide. DAMS AND CONTROL WORKS 21.
Page 24
... timber from the Sierra Ancha Mountains about 30 miles distant . The road was built in 1903 and a contract made for cutting and sawing the timber . During the operations of the mill about 3,000,000 feet of lumber were cut and distributed ...
... timber from the Sierra Ancha Mountains about 30 miles distant . The road was built in 1903 and a contract made for cutting and sawing the timber . During the operations of the mill about 3,000,000 feet of lumber were cut and distributed ...
Page 30
... timber bulkhead on the upstream face of the dam . Because of trouble in the north tunnel in 1911 it was necessary to open the culvert , and the bulkhead was blown out with dynamite . It was closed again in 1912 and has not been opened ...
... timber bulkhead on the upstream face of the dam . Because of trouble in the north tunnel in 1911 it was necessary to open the culvert , and the bulkhead was blown out with dynamite . It was closed again in 1912 and has not been opened ...
Page 38
... a 10 - foot rise and with a length of 487 feet ; and a lower cofferdam with a maxi- mum height of 25 feet and a total length of 150 feet . The cofferdams were built of timber cribs filled with rock 38 DAMS AND CONTROL WORKS.
... a 10 - foot rise and with a length of 487 feet ; and a lower cofferdam with a maxi- mum height of 25 feet and a total length of 150 feet . The cofferdams were built of timber cribs filled with rock 38 DAMS AND CONTROL WORKS.
Page 39
... timber cribs filled with rock , gravel , and fine material sluiced in place . The faces were of solid timber construction with joints caulked with oakum . The bottom and sides of the tunnel were lined with concrete . The arched top was ...
... timber cribs filled with rock , gravel , and fine material sluiced in place . The faces were of solid timber construction with joints caulked with oakum . The bottom and sides of the tunnel were lined with concrete . The arched top was ...
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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...