The Project Gutenberg EBook of The Mentor: Reclaiming the Desert, Vol. 6, Num. 17, Serial No. 165, October 15, 1918, by C. J. Blanchard This eBook is for the use of anyone anywhere in the United States and most other parts of the world at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.org. If you are not located in the United States, you'll have to check the laws of the country where you are located before using this ebook. Title: The Mentor: Reclaiming the Desert, Vol. 6, Num. 17, Serial No. 165, October 15, 1918 Author: C. J. Blanchard Release Date: July 16, 2015 [EBook #49454] Language: English Character set encoding: UTF-8 *** START OF THIS PROJECT GUTENBERG EBOOK THE MENTOR *** Produced by Juliet Sutherland and the Online Distributed Proofreading Team at http://www.pgdp.net THE MENTOR 1918.10.15, No. 165, Reclaiming the Desert Cover page LEARN ONE THING EVERY DAY OCTOBER 15 1918 SERIAL NO. 165 THE MENTOR RECLAIMING THE DESERT By C. J. BLANCHARD of the United States Reclamation Service DEPARTMENT OF SCIENCE VOLUME 6 NUMBER 17 TWENTY CENTS A COPY Land and the Home-Coming Soldier To the great number of returning soldiers, land will offer the great and fundamental opportunity. The experience of wars points out the lesson that our service men, because of army life, with its openness and activity, will largely seek out-of-door vocations and occupations. This fact is accepted by the allied European nations. That is why their programs and policies of re-locating and readjustment emphasize the opportunities on the land for the returning soldier. The question then is, “What land can be made available for farm homes for our soldiers?” (decorative) We have millions of acres of undeveloped lands that can be made available for our home-coming soldiers. We have arid lands in the West; cut-over lands in the Northwest, the Lake States and the South; and also swamp lands in the Middle West and South, which can be made available through proper development. Much of this land can be made suitable for farm homes if properly handled. But it will require that each type of land be dealt with in its own particular fashion. The arid land will require water; the cut-over land will require clearing, and the swamp land must be drained. Without any of these aids, they remain largely “No Man’s Land.” The solution of these problems is no new thing. In the admirable achievement of the Reclamation Service in reclamation and drainage, we have abundant proof of what can be done. (decorative) Our thought should now be given to the problem. We should know by the time the war ends, not merely how much arid land can be irrigated, nor how much swamp land reclaimed, nor where the grazing land is and how many cattle it will support, nor how much cut-over land can be cleared, but we should know with definiteness where it is practicable to begin new irrigation projects, what the character of the land is, what the nature of the improvements needed will be, and what the cost will be. We should know also, not in a general way, but with particularity, what definite areas of swamp land can be reclaimed, how they can be drained, what the cost of drainage will be, what crops they will raise. We should have in mind specific areas of grazing lands, with a knowledge of the cattle that are best adapted to them, and the practicability of supporting a family upon them. So, too, with our cut-over lands. We should know what it would cost to pull or “blow-out” stumps and to put the lands into condition for farm homes. We should know what it will cost to buy these lands If they are in private hands. In short, at the conclusion of the war, the United States should be able to say to its returned soldiers: “If you wish to go upon a farm, here are a variety of farms of which you may take your pick, which the Government has prepared against the time of your returning.” From a letter to President Wilson from Secretary Lane of the Department of the Interior. THE MENTOR ASSOCIATION Established for the Development of Popular Interest in Art, Literature, Science, History, Nature and Travel THE MENTOR IS PUBLISHED TWICE A MONTH BY THE MENTOR ASSOCIATION, INC., AT 114 EAST 18TH STREET, NEW YORK, N. Y. SUBSCRIPTION, FOUR DOLLARS A YEAR. FOREIGN POSTAGE 75 CENTS EXTRA. CANADIAN POSTAGE 50 CENTS EXTRA. SINGLE COPIES TWENTY CENTS. PRESIDENT, THOMAS H. BECK; VICE-PRESIDENT, WALTER P. TEN EYCK; SECRETARY, W. D. MOFFAT; TREASURER, J. S. CAMPBELL; ASSISTANT TREASURER AND ASSISTANT SECRETARY, H. A. CROWE. OCTOBER 15th, 1918 VOLUME 6 NUMBER 17 Entered as second-class matter, March 10, 1918, at the postoffice at New York, N. Y., under the act of March 3, 1879. Copyright, 1918, by The Mentor Association, Inc. A MIRACLE OF IRRIGATION—UNCOMPAHGRE VALLEY, COLORADO RECLAIMING THE DESERT Irrigation ONE rrigation, the artificial application of water to produce crops, is as old as agriculture. Genesis 1,17: “A river went out of Eden to water the garden.” The practice of irrigation is probably coincident with that of the earliest agriculture of record for the reason that the latter was begun in regions of deficient rainfall in the Old World—Egypt, Assyria, Mesopotamia, Persia, India, Ceylon and China. Evidences abound of the existence of important storage and distribution systems constructed previous to 2000 B. C. Even greater antiquity is ascribed to similar work, the remains of which are found in the valley of the Euphrates, and also in China. The ancient aqueducts and subterranean canals of South America, extending for thousands of miles, once supplied great cities and irrigated immense areas. Irrigation on the Continent of North America was old when Rome was in the glory of its youth. Centuries before the venturous Norseman landed upon the bleak and inhospitable shores of New England a large population dwelt in the hot valleys of the Southwest, in New Mexico and Arizona. From the solid rock, with primitive tools of stone, they cut ditches and hewed the blocks for many chambered palaces, which they erected in the desert or on the limestone ledge of deep river canyons. These voiceless ruins, older than the memory of many centuries, tell the story of a thrifty home-loving and semi-cultured people, concerning whose fate history brings us no word. The long lines of their canals, now choked with the wind-swept drift of centuries, give mute and pathetic evidence of the patience and engineering skill of the builders. Early in the sixteenth century, when Coronada, the first great American explorer, swept up the Rio Grande Valley in Texas and New Mexico, he found a pastoral race dwelling in pueblos and practicing irrigation as had their forefathers, perhaps as far back as in the days of Abraham. The priests with the aid of their Indian converts extended the practice of irrigation wherever they established the missions, and introduced many varieties of fruits and vegetables from Spain and Italy. Irrigation by English-speaking people began in America in 1700, and, for fully a century, was confined to use in the cultivation of rice on narrow strips along the coastal rivers of the Carolinas and Georgia. The first Americans to reclaim extensive areas in the arid region were the Mormons, who, in 1847, settled on the eastern borders of the Great Interior Basin, on the site of Salt Lake City. Under wise leadership and through community effort, numerous canal systems were constructed and extended to thousands of acres of desert lands. Between 1862 and 1880 many canal systems were constructed in Colorado, though none was important. The success of the Greeley colony, established in 1870 in the northern part of the State, gave considerable impetus to irrigation all over the arid region. In the last thirty years there has been an awakening to the opportunity that lies in the arid West for the homemaker, and a remarkable transformation has taken place in many parts of this region. Irrigation canals long enough to girdle the globe three times now distribute the normal flow and the stored water of Western streams to millions of acres, which support hundreds of thousands of contented farmers. Cities, populous and great, have sprung up, rural communities, attractive and prosperous, broad vistas of fertile fields and blossoming orchards have replaced the wastes of sand and sage brush. WRITTEN ESPECIALLY FOR THE MENTOR BY C. J. BLANCHARD ILLUSTRATION FOR THE MENTOR, VOL. 6, No. 17, SERIAL No. 165 COPYRIGHT, 1918, BY THE MENTOR ASSOCIATION, INC. HIGH LINE CANAL, UTAH VALLEY, UTAH RECLAIMING THE DESERT Skyline Canals TWO ocating and excavating several of the main canals proved almost as difficult and trying as the building of the big dams. This was especially true in the Yakima and Okanogan valleys in Washington, the St. Mary and Flathead in Montana, Uncompahgre and Grand River in Colorado, and the Utah valley, Utah. These canals cling to the edges of deep and precipitous canyons, or hug the steep mountain slopes. Here and there huge aqueducts of reinforced concrete span the chasms. For miles the water is siphoned across broad ravines in iron-banded stave pipe, or flows in tunnels through the cliffs. The Tieton main canal of the Yakima project, Washington, for a distance of twelve miles is through a very rough country. It is cement lined throughout, and for two miles is in tunnels. For the greater part of its length it hugs the side of the canyon, in places 500 feet above the river. The lining for the canal was molded on the river bank, where water, sand, and gravel were available for concrete making, and the forms were carried to the top of the canyon by tram and cableways. The capacity of the canal is 300 cubic feet per second, and it is now irrigating 40,000 acres. The High line Canal of the Strawberry Valley project swings around the steep slopes of the Spanish Peaks of the Wasatch Range in Utah for several miles. At one point a portion of the water is dropped in pipes to the turbines, where power is developed and distributed to several towns in the valley. At various points along its course the canal is covered with a reinforced concrete roof to prevent injury and filling up from avalanches in the spring. WRITTEN ESPECIALLY FOR THE MENTOR BY C. J. BLANCHARD ILLUSTRATION FOR THE MENTOR, VOL. 6, No. 17, SERIAL No. 165 COPYRIGHT, 1918, BY THE MENTOR ASSOCIATION, INC. GUNNISON TUNNEL. COLORADO RECLAIMING THE DESERT The Gunnison Tunnel THREE otable among the engineering works calling for courage and daring is the Gunnison Tunnel. This great bore, which in a sense changes physical geography, is excavated under the Vernal Mesa in western Colorado. The river portal is in the famous Black Canyon of the Gunnison, a precipitous chasm 3,000 feet deep, and the tunnel extends for nearly six miles, 2,500 feet below the surface of the Mesa. The outlet is in the valley of the Uncompahgre. By means of a low diversion dam, the waters of the Gunnison are turned into the tunnel and transferred to the desert valley of another stream. The early reconnaissance surveys and examinations and the final work of determining the location of the tunnel were attended with unusual dangers. The exploration of the canyon, which up to that time had never been traversed by man, and the careful and detailed preparation of a topographic map of this rugged region called for genuine heroism. In the former task the surveyors risked their lives for many days in the depths of the gorge, and, in the latter, the engineers performed their duties under conditions of great hazard and peril. The construction forces met and overcame almost every difficulty ever encountered in tunnel excavation. Gas, cave- ins and subterranean springs interposed obstacles throughout the work. At one time a heavy flow of carbon dioxide, or choke damp, forced the workmen to flee for their lives and delayed operations until a ventilating shaft 680 feet deep was sunk. The heavy flows of hot and cold water necessitated the use of large pumps for months at a time. For more than 500 feet the tunnel was driven through a remarkable bed of fossils, consisting of the shells of extinct sea creatures, many of which were of great size. Exposed to the air, disintegration was rapid, and the huge masses of falling rock imperilled the lives of the workmen. Notwithstanding the extraordinary care of the Government to safeguard the employees, a heavy toll of human lives was taken. The excavation work was projected from four adits, three on the Uncompahgre side and one in the canyon, and crews of drill men and assistants simultaneously began boring into the mountain from both sides. When the last charge of dynamite had been exploded and the tunnel was “holed” through, it was found that the line was true within a fraction of an inch. Connecting with the outlet of the tunnel is a large cement-lined canal which conveys the water to the valley ten miles below. Here it mingles with the Uncompahgre, and by means of a complex distribution system of canals and laterals, finally reaches the irrigable lands. The Uncompahgre Valley is one of exceptional scenic beauty, and is blessed with a fertile soil adapted to the growing of a wide variety of products. Its irrigable area is approximately 100,000 acres, more than half of which is now producing two generous harvests. The discharge of the Uncompahgre River was quite inadequate for the irrigable lands in the valley, which had been brought under the ditches constructed before the passage of the reclamation act, and failure of crops occurred frequently during the low water periods. In addition there were thousands of acres of desert land in the valley doomed to aridity unless the water supply could be supplemented. The Gunnison River, flowing uselessly in its profound canyon on the other side of the range, was drawn upon by means of the tunnel, and an abundance of water is now assured for all the lands included in this project. Agriculture here is exceedingly diversified, and in many sections, is intensive. The products of the soil range include alfalfa, cereals, sugar beets, potatoes, onions, peas, beans, and other vegetables, peaches, pears, and apples. Surrounding the valley are vast areas of fine grazing lands included in national forests, which furnish summer pastures for thousands of cattle and sheep. The rapid settlement of the farm lands has been followed by a corresponding growth of the towns of Montrose, Delta and Olathe. WRITTEN ESPECIALLY FOR THE MENTOR BY C. J. BLANCHARD ILLUSTRATION FOR THE MENTOR, VOL. 6, No. 17, SERIAL No. 165 COPYRIGHT, 1918, BY THE MENTOR ASSOCIATION, INC. ROOSEVELT DAM, ARIZONA RECLAIMING THE DESERT The Roosevelt Dam FOUR irst among the imposing structures of the Service in the order of beginning and completion is the Roosevelt Dam, the important engineering feature of the Salt River project in Arizona. Brilliant and daring in its conception, diverse and complicated in its problems, and stupendous in its structural features, the Roosevelt Dam stands today an enduring monument to the creative genius of its designer and builder. The layman will not appreciate the complexity of the problems and the variety of obstacles that were encountered without an understanding of the locality in which the work was carried on. The dam is located in a region which was once regarded as almost inaccessible except to the nomadic Apache, who found a safe refuge here for many years. The nearest railway is 62 miles away. Twenty miles of this distance is across a waterless, parched and forbidding desert. For more than 40 miles the country, gashed and fissured into fantastic forms, a region of stupendous canyons, steep sided mountains, and turbulent streams, presented an almost insuperable barrier to ingress. It is a region of colorful and inspiring scenery, but most unpromising as a site for a large engineering work. The initial step was to build a highway to the dam-site, a task of much difficulty on account of the rough country and the unwillingness of white laborers to do the work. The road was finally completed, largely by utilizing the Apache Indians, many of whom were remnants of Geronimo’s band of marauders. The influence of this experiment in employing Indians has been of lasting benefit to the Red Men of the Southwest, many of whom have continued on similar work for railroads and other corporations. The Roosevelt Road, now familiarly known as the Apache trail, is one of the most spectacular highways in the country, and thousands of tourists go over it each year in automobiles. The site for the dam was located at the entrance of the profound canyon that Salt River has cut through the mountains. Just above the canyon, Salt River and Tonto Creek converge in a broad, level valley, which is now submerged to a depth of nearly 200 feet, forming one of the largest artificial lakes in the country. The Roosevelt Dam is of sandstone hewn from the walls of the canyon in which it is built. It is of gravity section, arched up stream, 280 feet high, 168 feet thick at base, and 1,080 feet long on top. At its base it covers an acre of ground. A building 209 feet square and 26 stories high would about cover the space of the dam except that halfway up the sides there would be space for two more structures, each 11 stories high and 885 feet long on top. Owing to the long haul for the railroad the activities of the engineers were varied and numerous. The Government cement mill turned out 600,000 barrels of first-class cement, the saw-mill in the National Forest manufactured all the lumber required to house 2,000 people, and for stores, offices, etc.; a hydro-electric plant furnished power to the contractor on the dam and light for the camp; two farms were operated to supply food for the employés; water works and sewerage systems were installed, and law and order were preserved during four years of construction. The engineer had charge also of a large commissary, a big mess, and superintended a brickyard and cement pipe plant. During the building of the dam the valley below was the scene of unprecedented activity. A million-dollar diversion dam was constructed across the Salt River to divert the stored water into thousands of miles of canals; power plants, pumping plants, transmission lines, and a thousand and one engineering details were completed in advance of the great day when the turbulent floods of Salt River would be conserved and led to the thirsty lands. On March 18, 1911, former President Roosevelt, in the presence of an assemblage of nearly 1,000 people, formally dedicated the structure which fittingly bears his name. By the simple pressure of an electric button the enormous gates weighing 60,000 pounds were raised and released the pent-up floods for irrigating nearly 200,000 acres of Salt River Valley. The swift passing of years has been marked by marvelous progress in this desert valley. In 1902, when the work was started, the assessed valuation of the country, of which the valley is the larger part, was $5,000,000. In 1916, the taxable property values were $72,000,000. In 1913, the first crop census of the project was taken and showed an irrigated acreage of 159,170, and a gross value of crops of $4,775,000. In 1917, the total acreage watered was 201,600; the gross value of crops was $13,692,000. During the same period the number of farms increased from 3,600 to 4,326. The net cost of the entire project to June 30, 1917, including $3,500,000 for the Roosevelt Dam, was $11,367,000. The annual returns from the land irrigated by it are more than $3,000,000 in excess of this amount. The gross value of crops in 1917 was almost equal to that of New Hampshire and Rhode Island in the census year of 1909. In October of 1917 the Roosevelt Dam, canal system, and power plants were formally transferred to the Water Users’ Association, under whose management the project henceforth will be operated. WRITTEN ESPECIALLY FOR THE MENTOR BY C. J. BLANCHARD ILLUSTRATION FOR THE MENTOR, VOL. 6, No. 17, SERIAL No. 165 COPYRIGHT, 1918, BY THE MENTOR ASSOCIATION, INC. ARROWROCK DAM, IDAHO—THE HIGHEST DAM IN THE WORLD RECLAIMING THE DESERT The Highest Dam in the World FIVE rrowrock dam, in Idaho, is probably the most spectacular structure to the credit of the Service. Completed on October 4, 1915, it ranks all other dams in the world in its height, 350 feet above bedrock. It is of rubble concrete, arch gravity type, and contains 585,130 cubic yards of material. It was built by Government forces, and not by contract, and its completion in two years less than the estimated time and at a saving of more than two million dollars in the estimated cost, furnishes a striking example of Federal efficiency and economy. In connection with this important work the engineers built and operated a standard gauge railway 14 miles long, which carried more than 80,000 passengers, and 14,000,000 tons of freight. A unique camp, containing 4,000 people, was established, with sewerage, water works, and electric lights. Schools for the children of employees, a hospital, postal savings bank, churches, and Y. M. C. A., a large general store and commissary, blacksmith and machine shops, sand-grinding and cement-mixing plants, all under the engineer’s direction, gave to the camp the aspect of an enterprising and busy community. It was a camp in which, for four years, there was no night. Throughout the greater part of this period the work proceeded without interruption, night and day, with three eight-hour shifts. Profiting by the experience gained on other large works of the Service, and with labor- saving devices of their own invention, the engineers on Arrowrock worked with extraordinary swiftness and sureness, and established a most enviable record for economy and time. The total cost of the Arrowrock is approximately $5,000,000, and its principal purpose is to conserve the floods of Boise River for the irrigation of 240,000 acres of land embraced in the Boise project. WRITTEN ESPECIALLY FOR THE MENTOR BY C. J. BLANCHARD ILLUSTRATION FOR THE MENTOR, VOL. 6, No. 17, SERIAL No. 165 COPYRIGHT, 1918, BY THE MENTOR ASSOCIATION, INC. SUBURB OF PHOENIX, ARIZONA—RECLAIMED FROM DESERT LAND RECLAIMING THE DESERT The Romance of the Desert SIX vein of romance runs through every form of human endeavor. No life so sordid, prosaic, or wretched, but has felt sometime its light and gladsome touch. In the desert, romance finds its chief essentials in adventure, courage, daring and self-sacrifice. For more than half a century man has been writing a romance of compelling interest upon the face of the dusty earth. Irrigation, with Midas’ touch, has changed the desert’s frown to smiling vistas of verdure. Its solemn silence has been broken by the voices of countless happy people. Our national strength is in its citizens, and the place in which the best is bred is in the country. The threat of urban congestion, no longer remote, and the pressure of population, which even now is bearing heavily upon our resources, are unanswerable arguments for increasing and making permanent the nation’s virility, prosperity and growth by creating more country homes. It is an economic axiom that the stability of a nation is assured only when the bulk of its citizens reside in their own homes. The ideals and principles for which our forefathers fought cannot be preserved and maintained by a citizenry whose interest does not extend beyond mere wage earning. The American desert was won by war, treaty, discovery and purchase. Flying at one time the flags of four nations, its history is rich in thrilling incident and adventure. Its milestones are the bones of trappers, explorers, and pioneers. Its people are strong and courageous. To battle with the elemental forces of nature has become a passion. While the glamor of romance in years agone is dispelled, it is still romance-land, but with a new background. The romance of creation now pervades the once silent desert, and the dominant thought and impulse is to establish there the well ordered life of New England with all the highly organized facilities for making existence in the country attractive. American people cannot rightly claim to have measured up to their opportunity until the deserts of the West and the swamp lands of the South have been replaced by vistas of prosperous farmsteads. WRITTEN ESPECIALLY FOR THE MENTOR BY C. J. BLANCHARD ILLUSTRATION FOR THE MENTOR, VOL. 6, No. 17, SERIAL No. 165 COPYRIGHT, 1918, BY THE MENTOR ASSOCIATION, INC. MENTOR GRAVURES A MIRACLE OF IRRIGATION, UNCOMPAHGRE VALLEY, COLORADO HIGH LINE CANAL, UTAH VALLEY, UTAH GUNNISON TUNNEL, COLORADO MENTOR GRAVURES ROOSEVELT DAM, ARIZONA ARROWROCK DAM, IDAHO SUBURB OF PHOENIX, ARIZONA THE MENTOR · DEPARTMENT OF SCIENCE SERIAL NUMBER 165 RECLAIMING THE DESERT By C. J. BLANCHARD United States Reclamation Service With Illustrations from Photographs Supplied by the United States Reclamation Service. Entered as second-class matter March 10, 1913, at the postoffice at New York, N. Y., under the act of March 3, 1879. Copyright, 1918, by The Mentor Association, Inc. MAKING FURROWS FOR IRRIGATION “It is a grander achievement to expand the domain of civilization by water than by blood.” ational reclamation was the dream of Western statesmen and thinkers for a quarter of a century before a laggard Congress gave it form and actuality by the law of June 17, 1902. With the passage of that law and another which initiated the construction of the Panama Canal,—both were signed by President Roosevelt in the same month,—the engineering forces of the nation were flung into widely differing fields of activity. With the Panama Canal engineers, the task, though herculean, was confined to a restricted and perfectly well defined area. On the other hand, the Reclamation problems were generally in regions widely separated, remote from transportation, and often unsurveyed and unexplored. To appreciate the variety and magnitude of the tasks involved, it is necessary briefly to describe the general character of the country in which these works were projected. The Desert States The great American desert may be roughly described as lying between the western boundary of the Mississippi Valley and the Pacific Ocean, and as embracing about two-fifths of the total area of continental United States, exclusive of Alaska. The superficial area of the several states that comprise this desert is almost equal to the combined areas of Norway, Sweden, Denmark, Holland, Germany, Belgium, France, Italy, the British Isles, Austro-Hungary, Spain, Portugal, the Balkan States, Turkey in Europe, and Japan. The population of the so-called desert states[A] is 16,423,625, while that of the countries above-mentioned is over twelve times as great. Within the confines of the desert is every gradation of climate from north temperate to semi-tropic found in these European countries. Its physical geography includes a wide variety of features from the Great Plains to the highest and lowest elevations in our country. Herein are found the most notable scenic attractions, including the great national playgrounds of Yellowstone, Glacier, Rocky Mountain, Mount Rainier, Crater Lake and Yosemite National Parks, the Grand Canyon of Arizona, and the principal national forests. ARIZONA, NEW MEXICO, CALIFORNIA, OREGON, WASHINGTON, NEVADA, UTAH, IDAHO, MONTANA, COLORADO, Kansas, Nebraska, North and South Dakota, Oklahoma. As to water supply, the desert belongs in two regions, arid and semi-arid. West of the Missouri and extending to the foot of the Rocky Mountains, is a vast area of foothills and gently sloping, grassy prairies, which constitute a large part of the semi-arid or sub-humid region of the United States. This broad belt, stretching from Mexico northward into Canada, has no clear-cut boundary separating it from the humid region on the east or the arid region on the west, owing to the variance of the mean annual precipitation in many localities. A convenient and easily marked line for the eastern boundary of the arid region is one closely following the hundred and third meridian. On the north it bends away from the [A] THE FIRST FLOW OF WATER In Grand Valley Project, Colorado FORTY BUSHELS OF WHEAT PER ACRE Shoshone Project, Wyoming. This was desert land in 1915 WHEAT ON SHOSHONE PROJECT, WYOMING This land was desert in 1908 SAGE BRUSH AND ALFALFA, MINIDOKA PROJECT, IDAHO On one side of the fence is the desert sage brush, on the other rich alfalfa meridian toward the west, and on the south tends eastward north of the Rio Grande. On the west the arid region extends to the Pacific Coast in extreme southern California, but from Monterey north there is a narrow belt of semi-arid and humid country bordering the Pacific Ocean. The Coast Range is humid, especially in Oregon and Washington, where the rainfall is as heavy as in any other part of the United States. The true desert, wherein the production of crops is wholly dependent upon the artificial application of water, lies for the most part west of the Rocky Mountains. Its estimated area, 900,000 square miles, is probably slightly greater than that of the semi-arid region. An accurate determination of the relative size of each, however, is not possible until a comprehensive hydrographic survey has been completed. Contrary to popular opinion, this region is not a vast wilderness, desolate and unpromising. Between the mountain ranges lie many beautiful valleys, through which flow numerous streams fed by melting snows. Utah and Nevada contain large areas of sage-brush desert, comprising what is known as the Great Basin, which has no outlet to the sea, and is doomed to aridity by reason of the absence of living streams. Millions of acres of desert now inhabited by the coyote and the rattlesnake await only the coming of the engineer to wake to teeming fecundity. In one important respect the arid and semi-arid regions are alike, and that is in the character of the streams. Almost without exception the rivers of the West are erratic and “flashy” in flow, are subject to long periods of drought and sudden and destructive floods. The full utilization of these streams for irrigation and power necessitates storage. In the control of floods, engineers have found their greatest problem, and one whose solution has taxed the skill, imagination and daring of twentieth-century genius. National Irrigation National irrigation became a fixed policy of the American Government with the passage of the Reclamation Act in June, 1902. The principal provisions of this act are briefly as follows: First. A reclamation fund in the Treasury consisting of the proceeds from the sales of public lands in the sixteen arid and semi-arid states.[A] THESE INCLUDE THE STATES NAMED IN THE FIRST FOOT-NOTE, with Texas added. Second. A Reclamation Service in the Department of the Interior to investigate and report on the irrigation projects to the Secretary of the Interior, who, with the approval of Congress, may authorize construction and let contracts, providing the money is available in the fund. Third. The return to the fund of the actual cost of each project by the sale of water rights, payments to be made in a series of instalments running over a period of twenty years without interest. The money so returned is to be used again and again on other works. Fourth. The holding of public lands for actual settlers under the homestead act in small farm units sufficient to support a family. Fifth. The sale of water rights to private land owners, but not for more than 160 acres. [A]