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half miles long is built from the lake to the Yakima River, thereby obtaining 117,500 acre-feet of substorage.
During the year 1905 the feasibility of the Tieton unit was investigated and approved by the Secretary, March 27, 1906. This system is designed to furnish water for 34,500 acres. This unit consists of a regulating reservoir, a diversion dam and headworks, main canal and distribution system. The regulating reservoir created by the Clear Creek Dam is on the North Fork of the Tieton River. The purpose of the reservoir is to equalize the diurnal flow of the Tieton River during the months of July and August. Construction was begun on the dam April, 1914, and completed by November of the same year. The diversion dam is located on the Tieton River, approximately fifteen miles above its junction with the Naches River, about eight miles below the McAllister Dam site. It is a concrete weir three feet high and one hundred and ten feet long. At the end of the dam on the right side of the river is located the headworks structure of the main canal. This structure is built of reinforced concrete and contains three 4x5 foot gate openings, each controlled by a cast iron sluice gate operated by hand. The left end of the dam terminates in low retaining walls. The main canal of the Tieton unit runs along the south side of the Tieton Canyon for twelve miles, at which point it is five hundred feet above the river and passes through the rim of the canyon by way of a tunnel to the project lands below. The distribution system consists of three separate units, covering approximately 12,000 acres each, namely, the Naches Branch, which waters the lands between the Naches River and the North Fork of Cowiche Creek; the Cowiche-Yakima branch, which waters the lands in the Cowiche ;and the Wide Hollow branch, which waters the lands between the Cowiche Mountains and Ahtanum Creek. This would indicate the great length of laterals and sub-laterals, a total of three hundred and twenty miles. The Tieton Reservoir is to be located on the Tieton River at McAllister Meadows at an altitude of two thousand eighth feet. The dam is to be one hundred and ninety-five feet in
one thousand feet long, and to contain nine hundred and
2011sand cubic yards. The capacity of the reservoir feet. Work was begun on this in 1917, but was suspended in the Spring of 1918.
The Kittitas unit consists of those from the Yakima River in the vicinity acres lying on both sides of the river are unit.
The Wapato unit consists of those
wete su i ves: bank of the Takime River. nen: Parket. to th: TESETOOL. Irrigating 106.000 acres of land bf gravity and 14.000 acres by panining with power generated at drops in the canal. These projects are considered very successful and the purpose of reclamation, i e., "to make homes for the homeless” has been accomplished to the extent of hundreds, and the increase in land values is shown in етеrу report.
The future work of the Reclamation Service will be to complete the Sunnyside and the Wapato units as officially approved: Kittitas High Line, Pomona High Line, Naches High Line, Roza High Line, Kennewick Extension of the Sunnyside Canal and the Benton or Leadbetter Canal.
Mr. R. P. Tule gives 48,799 acres as under irrigation in 1889, 135,470 acres in 1899, and 334,378 acres in 1909, in Washmgton. June 30, 1914, $6,555,299.73 was the reclamation fund in Wasiungt..
The entering into irrigation activities by tut I tera Covers ment by no means lessened that interesa pintat putetit sur les have continued to increase in mm. 1 zpra. au 1 riches of project until that part de tot testet?.. beast of its irrigatio prije
In 1900. construci w Land and Water Combrie It was buik in mia ng DE Ezzata the Spears latte É um serving IL.LUME ATAE ER TEST NEwant us
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