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Estimates of seepage and summary of drainage to June 30, 1918.

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Arizona-California: Yuma...
Colorado:

Grand Valley....
Grand Valley drainage district

Uncompahgre......
Idaho:
Boise-

Riverside and Big Bend...
Pioneer irrigation district.
Nampa-Meridian district.

Other parts of project......
King Hill.

.......
Minidoka..
Montana:

Flathead (Indian).............
Huntley.....
Milk River .......

Sun River......
Montana-North Dakota: Lower Yellowstone...
Nebraska-Wyoming: North Platte...
Nevada: Truckee-Carson..
New Mexico: Carlsbad......
New Mexico-Texas: Rio Grande..
Oregon:

Klamath...............

Umatilla....
South Dakota: Belle Fourche...
Washington:
Yakima-

Sunnyside............

Tieton....
Wyoming: Shoshone...............

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20, 500

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7,000

200 2, 668

18, 800
2,000

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POWER DEVELOPMENT.

Power development undertaken during the fiscal year 1918 was confined to sůpplying the demands of construction work and pumping plants giving assurance of prompt increase of crop production. The construction work in progress during the year is listed in the following table:

Project.

Plant.

Capacity.

400

Huntley..
North Platte....
Yakima Storage.........
Yakima-Sunnyside...

Ballantine auxiliary pumping plant..............horse-power..
Lingle power plant....

.........kilowatt..
Tieton power plant No.1.....
Tieton power plant No. 2...

.........do....
Rocky Ford power plant...
Grandview pumping plant.

horse-power..
Prosser pumping plant....

....do... Spring Creek pumping plant...

....do.... Yuma Valley drainage plant....

...do...

750

375 1,000

187

..do....

414

174

Yama...................

211 175

Preliminary studies were made of an extension of the Minidoka power plant involving the installation of two 5,000-kilowatt units and for the construction of the Price-Stub pumping plant on the Grand Valley project. Preliminary plans were completed and material purchased for the Chandler power plant and Goldfield-Superior transmission line on the Salt River project. This plant will contain

a 600-kilowatt induction generator and is designed to operate with minimum attendance. This construction as well as that of the above transmission line is being completed by the water users' association which assumed the operation and maintenance of the project during the fiscal year.

The commercial power systems were extended by the construction of additional lines and substations. The more important of such extensions actually constructed or definitely planned are listed below:

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An interesting feature of these developments is the extent to which strictly rural electric service has been extended by the formation of mutual companies purchasing power at wholesale from the United States and distributing it to stockholders on the basis of actual cost. In this way a considerable portion of the Minidoka project has already been supplied with power and lines are being gradually extended.

Numerous improvements were made in existing plants of the service and studies were in progress of possible future plants, including Arrowrock, Elephant Butte, and Yuma Mesa developments.

The following tables show the power and pumping plants installed on the various projects and the results of operation for the fiscal year:

Power plants operated by the United States Reclamation Service, fiscal year 191718.

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Salt River 1.

Kilo

watts.
Roosevelt .........! Hydro-| 10,000

electric.
Crosscut...

5,000

Cents.

0.12

Do...

...00....

6

Consoli

1}14,655, 489 1,451,593

18,867

South

Do.....

2,000

40,000 1,050, 938 $109, 253.09

....do...

. 10

7.000

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Kilowatt-
Feet.

hours. Cents.
80-226 $557, 559.86 8,064,000 0.265

111 480, 454.60 4,272,000 . 197
31 163, 139.60 1,473,200

. 202
19 109,500.73' 1,268,850 195
2 48.34 484,904.82 47, 139, 290

0308
30 167, 905.37 5,103,950
110 138, 511.52 5,049,910):

8,440.00 36, 460 4.94
288, 699.39 1,299, 744 2.00

59, 849.05 967,630 1. 406
108 11,100.00 106, 205 .643
55 12,925.00 52,659 .649
40 45, 492.13 620,684 .893

22, 740.54 150, 600

dated. Do....

Arizona Falls
Minidoka....

Minidoka...
Boise 3.......

Boise...
North Platte 4 ...

Lingle.......
Truckee-Carson 5..... Lahontan.....
Rio Grande 6....... Power Plant No.2......do....
North Dakota pump- I Williston....... Steam-
ing.

electric.
Strawberry Valley .... Spanish Fork..... Hydro-

electric.
Okanogan...

Power Plant No. 1. .....do.....

Power Plant No.2......do.....
Yakima-Storage...... Tieton No. 1...
Yakima-Sunnyside?.. Rocky Ford...

..do....

******

1,000
1,875

7501
1,875

150)
1,150

850
187
187

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.308'20, 535,99523, 273, 731

5,050,911 ......
* 5,014, 750

2,569
.185 1,027,000

926,518.
29,674 76,531
14,837 37,822
67,000

692,6402,636, 924 53,039........ 35, 156 31, 700... 218, 815 53, 929 22,272 17,840

63, 945. 32
10, 780.00
11,155.34

86.61
32, 186.00
9,923.03

1,000!

Do............

783.14

391.57 1,005.08

.....do.

2701

448, 033

105,651

1871

Operation costs are for months of July, August, September, and October, 1917. System taken over by water users Nov. 1, 1917. 3 Yearly average. 3 Leased to Electrical Investment Co. for 5 years beginning May 16, 1916. 4 50 per cent completed. 6 Leased to Canyon Power Co. for 10 years beginning Dec. 1, 1914. * Rates charged for industrial purposes, 3 cents per kilowatt-hour; for domestic uses, 10 cents per kilowatt-hour for first 10 kilowatt-hours and 8 cents thereafter. * Operated by irrigation district; costs not available.

Pumping plants operated by the United States Reclamation Service during fiscal year

1917-18.

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1 Type V.M.D.C.-vertical motor-driven centrifugal pump. Type H.M.D.C.-horizontal motor-driven centrifugal pump. Type 8. T. D. C.-steam turbine-driven centrifugal pump. Type G. E. P. C.-gasengine-driven centrifugal pump. Type V. T. D. C.- vertical hydraulic turbine-driven centrifugal pump.

* Operation data cover first four months of the year. System taken over by water users Nov. 1, 1917. 3 Construction 85 per cent completed. 1 Plant not operated during year. 6 Part of steam plant. • Pumping plants operated by irrigation districts; operating costs not available. Construction 70 per cent completed.

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Contracts for sale of power in force June 30, 1918.

Minidoka1..

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190.84
157.78
117.40
99.08
79.22
60.90
48.55
46.91
45. 24
44.89
35.99
35.19
33.89
31.05
24.14
23.55
23.50
21.75
21.64
21.34
20.20

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