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UITITED STATES DEPARTi-lENT OF THE INTERIOR BUREAU OF RECLAMATION STORAGE PROJECT GLEN C.Af'!YON UNIT P. 0. Box 277 Page,

June 9, 1960

Gentlemen:

I hope that you are 9lanniug to attend the concrete placement ceremony to be held here at on June 17, I refer, of course, to the letter of invitation sent to you earlier. To help you write preliminary stories we have prepared a fact sheet giving specific information on the dam. I am also enclosing p~otographs of Secretary of the Interior F"red A, Seaton, who will actually trip the first bucket; L. F. :Tylie, who will act as Master of Ceremonies; Ival v. Goslin, and Robert E. Harvey. If you plan·, to attend the ceremony, you can expect to receive a press kit on arrival which vTill include recent photographs of various features of the project. Also, if you have not already notified us as to your intentions to attend or not to attend the ceremony, we would certainly appreciate having this information so that we can make appropriate arrangements.

Remember, the press tour is scheduled for June 16~

Very truly yours,

. --····.,,,r...... --- ,.- ·-:·.. / /~..,- . ~~· ---~~ ~ --~'/ w. L. Rusho Special Services Officer

Enclosures 5

/ FACT SHEET ON THE MATERIALS TO BE USED IN GLEN CANYON DA1·1

A tremendous amount of material will be required during the next 2! years for the construction of Glen Ca..'1yon Dam . The dam and powerplant will con­ tain 5,063, 000 cubic yards of concrete . To make up this concrete the following amounts of material uill be needed:

12, 000,000 sacks of cement 220,000 tons of pozzolan 9,000,000 tons of aggregate 35,340 tons of steel.

C&\1ENT

The cement ,rill be trucked in from the Phoenix Cement Company plant in Clarkdale, Arizona, a distance of 188 miles. Each truck and trailer will contain 142 barrels of bulk cement and, ~n the average, a truck will arrive at the damsite every 33 minutes, night and day.

POZZOLA.i"\J

Pozzolan, derived from pumice rock, is added to concrete to give it desirable qualities. It is taken from an area 110 miles south of Page where it is quarried, dried, and ground. A load of pozzolan weighing 26 tons will arrive at the damsite every 103 minutes on the average. AGGREGATE

The aggregate to be used in Glen Canyon Dam i s taken from the stream bed of Wahweap Creek, six miles north of the damsite . T'ne aggregate will be washed and screened in a large plant at Wahweap Creek and hauled to the damsite in 30- ton loads.

The combination cf water and cement produces a certain amount of heat which is harmful to resulting concrete mix. Therefore, chipped ice rather than water ,rill be used in the concrete mix. For this purpose a refrigeration plant ,nth a capacity of 600 tons of ice per hour has been built on the rim of the canyon. Aggregate moving to the mixing plant by conveyor belt will be chilled by spraying '\-Ti th ice water. This operation will spray 800 tons of aggregate per hour and will require 1,200 gallons of water per minute.

MIXTIIG PLA.i"'fl' AfID CABL.t:.vlAYS

The mixing plant, or batch plant, can produce 480 cubic yards of concrete per hour, or 8 cubic yards per minute. The concrete ,,rill be placed in the dam by 12- cubic yard buckets. Each of these buckets weighs 7 tons empty and 31 tons when full . Two separate cableways will handle the buckets, 11hich means that 40 bucket loads per hour or 20 for each cable­ way ,rill be placed in the dam. A smaller auxiliary cableway vrill operate to place structural concrete in the powerplant. CONCRETE nr THE DAi-1

The dam will be built in huge blocks 7! feet high; 40, 60, 70 feet wide; and up to 220 feet long. The heat produced in these massive blocks by the setting of concrete will be removed through a system of aluminum tubing circu:!_ating ice water bet,,reen the blocks. This will require over 900 miles of this tubing. It is estimated that the total heat of hydration produced by the concrete in the aa.m will be 216,446,400, 000 Btu. This is the equivalent to the heat produced by the burning of 9,020 tons of bituminous coal.

COST

Glen Canyon Unit of the Colorado River Storage Project is estimated to cost a total of $326 ,000,000 . The power generated by the 900,000 KW powerplant will be sold. This sale of power will return 9':f~ of the cost of the storage unit.

THE RESERVOIR Aim NATIONAL PARK SE...~CE

Glen Canyon Dam will create a reservoir, now named Lake Powell, which will back up the main streaJJ1 of the Colorado 186 miles; it will also back water up 71 miles on the San Juan River . This scenic and unusual lake will be a.&ninistered as the Glen Canyon National Recreation Area by the Natio:ial Park Service and will have ample facilities for boating, fishing, sightseeing, and other activities.

COMPARISON WITH CYI'HER :tt.tA.JOR DAMS TI! THE UNITED STATES Length of Darn & Power- Reservoir Power Height crest pla'1.t Volume capacity capacity Dam ft . ft . cu. yd. acre-ft. - KW

Hoover 726 1,21~4 1:., 400, 000 29,827,000 1,249,800 Glen Canyon 700 1,560 5,063,000 28,040,000 900,000 Shasta 602 3,460 8,711,000 4,500,000 379,000 Grand Coulee 550 4,173 10, 585,000 9,402,000 1,974,ooo

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