"check out Hoover Dam. ..." Nevada Favorite Tip by Krystynn
Nevada General: 75 reviews and 57 photos
Favorite thing: check out <b>Hoover Dam</b>.
Here's a little more info of this great Dam for your noting:
(1) <i>How tall is Hoover Dam? </i>
It is 726.4 feet from the foundation rock to the roadway on the crest of the dam. The towers and ornaments on the parapet rise approximately 40 feet above the crest.
(2) <i>How much does Hoover Dam weigh?</i>
Well over 6,600,000 tons!
(3) <i>What was an unusual feature of Hoover Dam's construction? </i>
The dam was built in blocks or vertical columns varying in size from about 60 feet square at the upstream face of the dam to about 25 feet square at the downstream face. Adjacent columns were locked together by a system of vertical keys on the radial joints and horizontal keys on the circumferential joints (just think 'giant Lego set'). Concrete placement in any one block was limited to 5 feet in 72 hours. After the concrete was cooled, a cement and water mixture called grout was forced into the spaces created between the columns by the contraction of the cooled concrete to form a monolithic (one piece) structure. <i>Phew!</i>
(4) <i>How long did it take to build the dam, powerplant, and appurtenant works? </i>
5 years. Yes, just 5 years. The contractors were allowed 7 years from April 20, 1931 but concrete placement in the dam was completed May 29, 1935 and all features were completed by March 1, 1936.
(5) <i>How many men were employed during the dam's construction? </i>
It is believed that an average of 3,500 and a maximum of 5,218 men were employed. The average monthly payroll (then) was $500,000.
Thanks to the <i>Official Hoover Dam website</i> for the above info. I'm learning too even as I'm typing all this down. :-)
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