In black color Canyon covering the Colorado River in between Arizona and Nevada, about 30 mile southeast of las Vegas, Nevada.

exactly how tall is Hoover Dam?

that is 726.4 feet from structure rock come the roadway top top the crest of the dam. The towers and also ornaments on the parapet increase 40 feet over the crest.

exactly how much go Hoover Dam weigh?

more than 6,600,000 tons.

What form of dam is Hoover?

A concrete arch-gravity type, in i m sorry the water pack is brought by both gravity activity and horizontal arch action.

What is the preferably water press at the base of the dam?

45,000 pounds every square foot.

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exactly how much concrete is in the dam?

Three and also one-quarter million cubic yards. There space 4,360,000 cubic yards that concrete in the dam, powerplant and appurtenant works. This lot concrete would develop a monument 100 feet square and also 2-1/2 miles high; would rise greater than the 1,250-foot-tall empire State building if placed on an plain city block; or would pave a typical highway 16 feet wide, from mountain Francisco to brand-new York City.

The very first concrete because that the dam was inserted on June 6, 1933, and also the last on might 29, 1935. Approximately 160,000 cubic yards of concrete were placed in the dam per month. Height placements to be 10,462 cubic yards in at some point (including part concrete inserted in the input towers and powerplant), and also slightly end 275,000 cubic yards in one month.

How much cement was required?

much more than 5,000,000 barrels. The daily need during building of the dam was from 7,500 to 10,800 barrels. Reclamation had actually used just 5,862,000 barrels in that 27 year of construction task preceding June 30, 1932.

How was chemical warm caused by setting concrete in the dam dissipated?

through embedding an ext than 582 miles of 1-inch stole pipe in the concrete and also circulating ice water v it indigenous a refrigeration plant can produce 1,000 tons of ice cream in 24 hours. Cooling to be completed in in march 1935.

What was an unusual feature of Hoover Dam"s construction?

The dam was built in vertical columns of block that varied in size from around 60 feet square at the upstream face of the dam to about 25 feet square at the downstream face. An approximated 215 blocks comprise the dam. Surrounding columns were locked together by a system of vertical secrets on the radial joints and also horizontal tricks on the circumferential joints (think "giant Lego set"). Concrete location in any kind of one block was limited to 5 feet in 72 hours. After the concrete was cooled, a cement and also water mixture called grout was required into the spaces created in between the columns by the contraction of the cooled concrete to kind a monolithic (one-piece) structure.

What to be the primary items the work?

an ext than 5,500,000 cubic yards of product were excavated, and also another 1,000,000 cubic yards that earth and rock fill placed. By feature, this included:


because that the diversion tunnels, 1,500,000 cubic yards; for the foundation of the dam, powerplant, and also cofferdams 1,760,000 cubic yards; for the spillways and inclined tunnels, 750,000 cubic yards; because that the valve houses and intake towers, 410,000 cubic yards; earth and also rock fill for the cofferdams, 1,000,000 cubic yards.

In addition,

4,400,000 cubic yards the concrete to be placed, 410,000 straight feet that grout and drainage holes were drilled, and also 422,000 cubic feet that grout were inserted under pressure.

What to be the amounts of principal products used in the dam?

The primary materials, all of which were purchased through the federal government, were:

combine steel, 45,000,000 pounds; gates and valves, 21,670,000 pounds; bowl steel and outlet pipes, 88,000,000 pounds; pipe and fittings, 6,700,000 pounds or 840 miles; structure steel, 18,000,000 pounds; miscellaneous metal work 5,300,000 pounds. What room the geologic problems at the dam site?

The foundation and abutments are rock of volcanic origin geologically dubbed "andesite breccia." The rock is difficult and really durable.

What were the excavation depths from the river"s low-water surface to foundation rock?

In the upstream cutoff trench, it was 139 feet. The continuing to be excavation depths average 110 come 130 feet.

How lengthy did it take to develop the dam, powerplant, and also appurtenant works?

five years. The builders were allowed seven year from April 20, 1931, yet concrete location in the dam to be completed might 29, 1935, and all features were perfect by march 1, 1936.

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How countless men to be employed throughout the dam"s construction?

A full of 21,000 men operated on the dam v an typical of 3,500 and a maximum of 5,218 daily, which emerged in June 1934. The median monthly payroll was $500,000.

What building and construction work to be necessary prior to operations began at the dam site?

building and construction of Boulder City to home both government and contractor employees; building and construction of seven miles that 22-foot-wide, asphalt-surfaced highway native Boulder City come the dam site; construction of 22.7 mile of standard-gauge rail from the Union Pacific main line in ras Vegas to Boulder City and second 10 miles from Boulder City to the dam site; and also construction of a 222-mile-long power transmission line from mountain Bernardino, California, to the dam site to supply power for construction.