ILLUSTRATIONS. PLATE I. Roosevelt, Ariz., looking down Salt River from within the res- II. Construction work on the Roosevelt dam, Salt River project. IV. A, Forms and reenforcing for Pinto reenforced concrete pressure V. Intake works and temporary brush dam at the head of the power 86 VI. Diversion dam in Salt River at head of power canal, Salt River 88 VII. General map showing location of the Granite Reef dam and new 90 90 IX. Sections of Granite Reef dam at head of Arizona canal, Salt 90 X. Proposed plan of headworks for Arizona canal at north end of 90 XII. General progress map of Yuma project, California-Arizona.. XI. Operating mechanism for sluice gates, Granite Reef dam, Salt 90 100 102 102 102 water. 102 XVII. A, Completed section of upstream face of Laguna dam, Yuma pro- 102 102 XIX. Plan of sluice gates, canal regulator, etc., on Arizona side of 104 XXI. Details of canal regulator, Laguna dam, Yuma project. XX. Details of sluice gates on Arizona side of Laguna dam, Yuma 104 104 106 108 108 108 XXVI. A, East Portal of tunnel No. 2, south canal, Uncompahgre Valley project; B, Concrete-lined section on South canal, Uncompahgre Valley project... XXVII. A, Typical 10-foot drop on south canal, Uncompahgre Valley XXVIII. Minidoka dam from the south side, Minidoka project, Idaho... 110 110 116 116 Plate XXX. Spillway on south side of Minidoka dam, Minidoka project.... XXXIV. Upstream face of headworks of main canal, Minidoka project...... project XXXVII. Fish ladder at dam in Boise River, Payette-Boise project. Boise project...... XL. East end outlet from upper embankment, Deer Flat reservoir, Page. 116 118 118 118 118 122 124 124 124 130 130 XLI. Discharge diagram of Boise River, showing court decree of water 134 XLII. A and B. First culvert on the main canal under the Chicago, Bur- 144 XLIII. General map of the St. Mary basin, Montana.. 152 XLIV. Cross sections of the St. Mary canal, St. Mary basin.. 152 166 project. XLVII. Views showing progress on Pathfinder dam, North Platte XLVIII. Cross sections of Interstate canal, North Platte project. L. A Flume across Cotttonwood Wash, Interstate canal, North XLVI. Contractor's plant at Pathfinder dam, North Platte project, 176 176 178 176 178 LI. General plan of diversion dam in North Platte River and head- 180 LII. Headworks for Interstate canal, North Platte project. 180 LV. General map of Carlsbad project, New Mexico... LIV. General map of Truckee-Carson project, Nevada, showing distri- 180 186 210 LVI. Remains of Avalon dam, built by the Pecos Irrigation Company, Carlsbad project... LVIII. Plan and cross sections of Avalon dam, Carlsbad project. LVII. General plan of Avalon dam, showing topography of site, Carls- 210 210 210 212 214 LXI. A, Spillway No. 1 on Inlet canal, Hondo project; B, Section of completed embankment No. 5, Hondo project. 216 LXII. Embankment No. 5, Hondo reservoir, Hondo project. 216 216 LXIV. Topographic map showing location of Leasburg dam and canal, Rio Grande project, New Mexico-Texas.. 222 LXV. Plan and details of Leasburg diversion dam, Rio Grande project.. 222 224 dam, Rio Grande project; B, Leasburg diversion dam site, Rio 224 LXIX. Diagram showing gage heights of Missouri River at Buford and 228 Page. River, Oregon. Plate LXX. General map of Buford-Trenton project, North Dakota. tilla project... LXXIX. General progress map of Klamath project, Oregon-California . LXXX. A, Lake Ewauna, Oreg; B, Looking northwest from the lower end of Upper Klamath Lake, Klamath project.... LXXXI. A, Ankeny canal, Klamath project; B, Klamath Falls, Link LXXXII. Main canal, Klamath project. 230 230 230 230 248 248 248 250 250 256 256 256 258 LXXXIII. A, Lower portal of tunnel on main canal, Klamath project; B, Main LXXXIV. Headworks for main canal, Klamath project.. LXXXV. Details of ball-bearing gate-lifting device at headworks of main LXXXVI. Cross sections of main canal and tunnel, Klamath project. LXXXVII. A, Inlet canal, Belle Fourche project, South Dakota; B, Diversion dam and headworks in Belle Fourche River, Belle Fourche project.. LXXXVIII. A, Crow Creek wasteway and sluice, inlet canal, Belle Fourche project; B, Regulator at headworks of inlet canal, Belle Fourche project.. LXXXIX. General map of Strawberry Valley project, Utah. XC. Profile and cross section of tunnel and cross sections of canal, 266 266 272 272 XCI. General map of Okanogan project, Washington. 276 276 XCIII. A, Temporary dam in Shoshone River and flume for diverting XCIV. A, Constructing temporary dam in Shoshone River, Shoshone 296 296 XCV. Contractor's camp at upper end of Corbett tunnel, Shoshone 296 XCVI. A, Portal adit No. 1, Corbett tunnel, Shoshone project; B, Portal adit No. 3, Corbett tunnel, Shoshone project... XCVII. A, Concrete-lined portion of Corbett tunnel, Shoshone project; B, Timber-lined section, Corbett tunnel, Shoshone project... XCVIII. Plan of Corbett dam and headworks at Corbett tunnel, Shoshone project... 296 296 298 XCIX. Details of Corbett dam and head works at Corbett tunnel, Shoshone 298 C. Map of settling basin at end of Corbett tunnel, showing head- CI. Plan and section of headworks, Garland canal, Shoshone project.. 298 298 42 2. Diagram showing growth of actual and estimated receipts and 50 LETTERS OF TRANSMITTAL. DEPARTMENT OF THE INTERIOR, The SPEAKER OF THE HOUSE OF REPRESENTATIVES. SIR: The act of Congress approved June 17, 1902, entitled "An act appropriating the receipts from the sale and disposal of public lands in certain States and Territories to the construction of irrigation works for the reclamation of arid lands," provides (section 2) as follows: That the Secretary of the Interior is hereby authorized and directed to make examinations and surveys for, and to locate and construct, as herein provided, irrigation works for the storage, diversion, and development of waters, including artesian wells, and to report to Congress at the beginning of each regular session as to the results of such examinations and surveys, giving estimates of cost of all contemplated works, the quantity and location of the lands which can be irrigated therefrom, and all facts relative to the practicability of each irrigation project; also the cost of works in process of construction, as well as of those which have been completed. In compliance with the requirements of the statute, I have the honor to inclose herewith copy of a letter from the Director of the Geological Survey, dated the 28th ultimo, transmitting the report contemplated by the above-mentioned section of the act of June 17, 1902. E. A. HITCHCOCK, Very respectfully, Secretary. DEPARTMENT OF THE INTERIOR, UNITED STATES GEOLOGICAL SURVEY, Washington, D. C., November 28, 1906. SIR: I have the honor to transmit herewith a report of the work done and in progress under the reclamation act approved by the President on June 17, 1902, together with other information essential to an understanding of the subject. This report supplements the First, Second, Third, and Fourth Annual Reports of the Reclamation Service already printed as Congressional documents. It relates in particular to the operations during the fiscal year ended June 30, 1906, but in a few instances information of a later date has been inserted, particularly in connection with operations that are nearly completed. The report describes the progress that has been made on projects authorized for building. In the four years that have elapsed since the passage of the act plans have been prepared for most of the large works that are to be built in the near future, and these works have been brought to a point where the construction is fairly |