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project. Imperial Dam will divert water from the Colorado River for both the All-American Canal in California and the main canal of the Gila project in Arizona.
The gravity main canal will have an initial capacity of approximately 1,900 cubic feet per second and may be enlarged in the future to 6,000 cubic feet per second. At wash crossings and in rock open cuts, the canal section has been made sufficiently large for its ultimate capacity. The length of the canal is nearly 18 miles. Included in its principal structures are two tunnels through the westerly extension of the Laguna Mountains and a siphon beneath the Gila River.
A pumping plant will take water from the end of the gravity Main Canal and lift it by electrically driven pumps to the Mesa lands. Three lifts are proposed for the first unit of approximately 84, 134, and 184 feet. It is planned that the lower lift will be constructed first, and construction of the higher lifts deferred until the lands under the lower lift are developed.
The distribution system will consist of distributing canals, miscellaneous structures, and a network of laterals.
The power house base at Parker Dam (now being built by the Bureau of Reclamation for the metropolitan water district of southern California) is proposed to be cosntructed as a part of the Gila project. Under the provisions of an agreement executed between the United States and the metropolitan water district, the Government is entitled to a proportionate share of the power which can be developed at Parker Dam. The Government's share of this power will be used in developing the Gila project. In order to avoid the future heavy expense of again cofferdamming and unwatering the site for the foundation at the power house, the foundations will be built at the time the dam itself is constructed and the river is diverted for that purpose. This plan will result in a material saving in cost. A transmission line will be erected from Parker Dam to the pumping plant, a distance of approximately 118 miles.
Estimated cost and funds available. The cost of the first unit of the project is estimated to be $20,500,000.
An initial allotment of $2,000,000 from Emergency Relief Appropriation funds was made available on September 26, 1935, for starting construction of the project. This amount was later reduced to $1,800,000. An appropriation of $1,250,000 from the Reclamation fund was provided in the Interior appropriation bill for 1937.
Repayment.—Construction costs are estimated to be $134 per acre for the mesa lands and $74 per acre for the lower Gila lands. These costs are to be repaid to the Government in 40 years without interest, requiring average per annum payments of $3.35 per acre for the mesa lands and $1.85 per acre for the lower Gila lands. The annual operation and maintenance costs of the first unit are estimated to be $4.71 per acre. It is believed that the payments may be made without undue burden, as the crops to be raised on the lands are similar to those on the Salt River project, where the average annual crop value is now approximately $57 per acre and in many years has exceeded $100 per acre.
Construction in progress.—Construction is in progress on the Imperial Dam desilting works, Gravity Main Canal, and the two tunnels. On January 1, 1937, the dam (being built as a part of the All-American Canal) was approximately 50 percent completed, the desilting works 10 percent, the Gravity Main Canal 20 percent, and the tunnels 10 percent. Money now available is being used for the work in progress, and in addition will pay for the power-house base at Parker Dam, for approximately 90 percent of the cost of the transmission line from Parker Dam to the pumping plant, and for commencing the surveys of the irrigable lands which will form the basis for the distribution system plans.
Construction proposed for the fiscal year 1938.-An appropriation of $1,250,000 is requested for the fiscal year 1938 to be used to complete the desilting works and Gravity Main Canal to station 30, continue work on the Gravity Main Canal from station 30 to the pumping plant, continue the driving and lining of the two tunnels, commence construction of the Gila River crossing, complete the transmission line from Parker Dam to the pumping plant, and complete the surveys for the distribution system.
Gila project, Arizona—Estimated costs, available funds, and estimate for 1938
EFFECT OF REDUCTION IN ESTIMATE REQUESTED OF BUDGET FOR GILA PROJECTS
Mr. LEAVY. You have the Gila project and the Salt River project. You are asking for the fiscal year 1938 $1,250,000 for the Gila River project, and for the Salt River project $500,000. What did you submit to the Budget on those projects?
Mr. Page. $2,500,000 for the Gila project, and $500,000 for the Salt River project. On the Salt River project it is also planned to receive $500,000 through the Indian Office because of their participation in the benefits from that project.
Mr. LEAVY. What effect will the reduction from $2,500,000 to $1,250,000 have on your operations on the Gila project?
Mr. Page. Well, it reduces the rate of progress materially. The Gila project will cost $20,500,000. Naturally, at the rate of $1,250,000 a year, it will take about 15 to 16 years to complete it, whereas, with a greater expenditure it will be completed in correspondingly less time. It is of no value until it is completed.
LOSS INCIDENT TO DELAYING COMPLETION Mr. LEAVY. Will it result in any loss by reason of the termination of a part of the work, that is, the discontinuance of a part of the work? That is, will it result in the loss of equipment and the use of the new temporary homes that are built for the purpose of constructing the project?
Mr. PAGE. It will be difficult for us to say definitely as to that. On the other hand, the contractors are there on the ground now, and when they complete their contracts, unless there is other work for them to do, they and their organizations must be disbanded.
Mr. LEAVY. This is largely canal work?
Mr. Page. No; it is across the river from the All-American Canal. Imperial Dam will divert water for both the All-American Canal, and the Gila project, but the Gila project is wholly in Arizona, while the All-American Canal is in California.
Mr. LEAVY. Does this Gila project involve hydroelectric development?
Mr. Page. No; it does not. Some part of the Gila money must be used in the construction of a power plant at Parker Dam, 150 miles sorth of Imperial Dam, in order to obtain power for pumping water lut some of the lands of the Gila project. To that extent, only, does it involve power development.
Mr. LEAVY. And the power that would be used in the pumping anuld be for the development of a reclamation project?
Jr. Page. That is right. Mr. Rich. I was interested on the train yesterday in going over these projects. For instance, the Gila project in Arizona, the first unit. That is to cost $20,500,000?
Mr. Page. Yes, sir.
Mr. Rich. You have received from the reclamation fund $1,250,000 and from Public Works $68,000, and from the Emergency Relief abtment $1,800,000?
Mr. Page. Yes, sir.
Mr. Rich. You are going to develop 150,000 acres. At the present time you have only 11,000. In other words, you are going to increase the acreage there by 139,000 in new land?
Jr. Page. That is right. Mr. Rich. You are supplying a population now of 7,300 people. Do you figure that that will be the population that will be served by the project? Mr. PAGE. Oh, no. That is the local population at present. There absolutely nobody living on the 139,000 acres. It is entirely desert, and almost entirely public lands.
Mr. Rich. Then the population that will be served will depend on ahom you will bring in in the future?
Mr. Page. And upon the size of the farms and the methods or rultivation which you use.
Mr. Rich. I thought that there must be something wrong with that, because in figuring the 20 millions and a half and dividing it by the number of people, it costs over $3,000 a head for this development, and I could not understand why anybody would want to do a thing of that kind. Mr. PAGE. Oh, no. No one would advocate that.
SALT RIVER PROJECT, ARIZONA Mr. SCRIGHAM. The next construction item is the Salt River project, for which $500,000 is included.
Mr. Page. I submit the following justification:
$500,000 Office of Indian Affairs.------
- 500, 000 i ads available: Public Works allotment....
200, 000 Emergency Relief allocation (1935 act).
3, 500, 000 Reclamation fund, fiscal year 1937...
1, 500, 000 mint necessary to complete: After fiscal year 193
Location.-Salt River project is located in the south-central part of Arizona. The project lands are situated on both sides of the Salt River in the vicinity of Phoenix and Maricopa, Ariz. The present water supply is obtained from the natural flow of the Salt and Verde Rivers, supplemented by stored waters of the Salt River. Reservoirs are located in Maricopa and Gila Counties.
Purpose.— Existing project works furnish a water supply for the irrigation of 250,000 acres of highly productive farm land and town-site property in the vicinity of Phoenix. In addition to the above-mentioned project lands an area of about 88,000 acres of nonproject lands receive a full or partial water supply from the storage system.
Construction of the Bartlett Dam will conserve the floodwaters of the Vertie River and furnish supplemental water for the project, the water supply of which is now inadequate. The other proposed work will increase the safety of the existing dams on the project.
Description..-The existing project works consist of the Roosevelt Dam and power plant, Horse Mesa Dam and power plant, Mormon Flat Dam and power plant, Stewart Mountain Dam and power plant, Cave Creek flood-control dam, Granite Reef diversion dam, and canal systems on both sides of the Salt River
The Roosevelt Dam and power plant, the Granite Reef Dam and the canal system were built by the Bureau of Reclamation. In 1917 the project works were turned over to the Salt River Valley Water l'sers' Association. The Home Mesa, Mormon Flat, Stewart Mountain Dams and power plants, and the Cave Creek Dam have been built by the Salt River Valley Water l'sers' Association since 1917.
A brief description of the present construction program is contained in the following paragraphs.
Bartlett Dam, & reinforced concrete multiple arch structure will be built on the Verde River. The dam has a maximum height of 270 feet and a crest length of 750 feet The outlet works consist of two 72-inch steel pipes and three 6-foot by 7-foot 6-inch high pressure conduits. The spillway, located on the right abutment, will have a capacity of 175,000 second-feet and will be controlled by three 50 by 50 foot gates. The reservoir formed by the dam will have a capacity of about 200,000 acre-feet and cover an area of 3,200 acres.
Roosevelt Dam spillway gates are being lowered about 6 feet in order to increase the spillway capacity to 150,000 second-feet.
Roosevelt power canal and diversion dam are being rehabilitated.
The spillways at the Horse Mesa, Mormon Flat, and Stewart Mountain Dams are being enlarged and completed to furnish a spillway capacity of 150,000 secondfeet at each dam.
Miscellaneous betterments are to be made to the irrigation system to such an extent as funds will allow and as determined by the engineers of the Bureau and association.
Estimated cost and funds arailable.-Construction work now in progress will cost $6,894,000.
Funds for the commencement of construction on the Bartlett Dem and other features were made available when the President allotted funds to the Burra's from the Emergency Relief Appropriation Act of 1935. The allotment specifically allocated $4,500,000 to this project. This allocation was later reduced to $3,500,000
In addition, $200,000 was allotted to the Bureau under the National Industrial Recovery Act of 1933 for use in connection with the construction of Bartlett Dam. This allotment was a part of the $694,000 20 percent of the cost of Bartiett Dam that the Othice of Indian Affairs is to pay toward construction of ti.e damn, as provided in its contract with the Salt River Valley Water I sors' Association, whereby 20 percent of the stored water may be used for irrigation of lands on tle Salt River Indian Reservation.
The second session of the Seventy-fourth (Congress appropriated $1,500,000 from the reclamation fund for the fiscal year 1937.
A distribution of estimated costs and available funds to the various physical features of the project is shown in the table at the end of report.
Repayment contracts. As previorals statent, the Roo Dam, the Granite Reef diversion damn and canal system were built by the B
Reclamation in 1911 and turned over to the Salt River Valley Water Up Pation in 1917. Of the original obligation of $10,210,000, before the pro
tion program was inaugurated, the Association has repaid 86,811,00
t. All psyments have been made when due. On November 24 1935, the Salt River Valley Water !
on executed a contract wie Tited States providing for the co.
1 the work
isted herein. The contract limits the obligation of the association to $6,000,000 and provides for the repayment in 40 annual installments.
is previously mentioned, the Office of Indian Affairs has entered into a contract with the above-named association to pay 20 percent of the cost of construction of the Bartlett Dam in order to obtain a 20-percent interest in the water stored beind the dam, the stored water to be used on the Salt River Indian Reservation.
Construction program through the fiscal year 1937.-A contract for the constructant of the Bartlett Dam was awarded on July 2, 1936, and work was started on August 12, 1936. It is estimated that the dam will be about 30 percent completed At the end of the fiscal year.
Work on enlargement of the spillway of the Roosevelt Dam was started on April 13, 1936, and completed on November 17, 1936.
The enlargement of the spillway of the Stewart Mountain Dam was started on January 19. 1936, and completed September 15, 1936.
The diversion dam for the power canal was started on October 23, 1936. This work will be completed early in the calendar year 1937.
On August 26, 1936, work was begun on the enlargement of the spillway at the Horse Mesa Dam. At the end of the fiscal year 1937 this work will be about 85 percent completed.
Bids for the enlargement of the spillway at the Mormon Flat Dam will be spened on January 18, 1937. It is estimated that the work will be about 40 percent completed at the end of the fiscal year.
Construction proposed for the fiscal year 1938.—During the fiscal year 1937, work will be continued on the Bartlett Dam and on the enlargement of the spillways at the Horse Mesa and Mormon Flat Dams. At the end of the fiscal year, the work at the Horse Mesa and Mormon Flat Dams will be completed.
It is estimated that the Bartlett Dam will be approximately 70 percent complete on June 30, 1938.
Estimated cost, available funds and estimate for fiscal year 1938
1883.000 to be supplied from appropriations to the Office of Indian Affairs.
NATURE OF WORK ON SALT RIVER PROJECT Mr. O'NEAL. May I ask about the Salt River project, is that just for extensions or new installation?
Mr. Page. That is for the construction of a new reservoir, the repairing of the spillways, the installation of spillways on some of the old dams built there years ago by the Salt River Valley Water Users Association.
Mr. O'NEAL. Do I understand that all of the construction and all the cost incident to the Salt River project is to be completely repaid to the Reclamation Service?
Mr. Page. The original cost was not completely repaid. It was well along toward completion at the time they incurred this additional