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you sake of ballet broad and gentle stretch it from the highlands to the sea cover it with green grass dense forests lush fields and great pastures cloak it with natural beauty build cities and towns along the wooded slopes and you have the valley of the Mississippi and greatest in the world this is the valley of the giant our nation is drained by many large streams but the largest by far is the Mississippi the outlets of water from an area of one and a quarter million square miles the Mississippi drains water from 31 of the states and through Canadian provinces waters from West Virginia Wisconsin and Wyoming all find their way to the Mississippi winding their way through the alluvial Valley an area subject to floods without protective engineering works this valley begins just yellow cape girardeau missouri and extends to the Gulf of Mexico the Lower Mississippi carries the combined discharge of the Missouri the Ohio and the Upper Mississippi and in the Lower Valley the waters of the st. Francis the fight the Arkansas the Washita the red and the Yazoo from regulation Creek from Brooks and bayous the water stopped flowing into larger streams down these into the Mississippi and a headlong rush to the scene south from Cairo past Memphis Vicksburg and Natchez past great steel bridges linking the east of the west south past Baton Rouge to deep water down the Great Valley to the Port of New Orleans throw the passes to the sea in its peaceful towards the Mississippi is a thing of beauty this is the river of Mark Twain a paddlewheel steamer the river of the Cubist neva grant this is the river of romance of laughter even today the slap of paddle wheels can be heard over the broad waters of the river and who you can hear the steady powerful form of twin-screw diesels today the Mississippi carries more peacetime tonnage than ever before in our history from Cairo to Baton Rouge the products transported by water each year would kill more than 300,000 freight sides and each year between New Orleans of the mouth of the passes to the see enough tonnage has moved to fill a freight train almost six thousand miles long the Mississippi is one of the most important of our national assets the strong arm of a widespread inland waterway system connecting the Gulf of Mexico with the Upper Mississippi linking the Great Lakes to the 70s during the war the existence of this waterway made it possible for us to build fighting ships hundreds of miles from our vulnerable oceanside shipyards maintenance of a safe navigation channel big Jacques upriver dustpan type dredges are used to remove dangerous sandbars these giant machines help keep the channel opening so traffic can move in safety from Cairo to Baton Rouge and 9 foot steps to maintain twelve foot depth is authorized for deep draft Rajas and steamers a depth of 35 feet is maintained at all times from Baton Rouge to the Gulf of Mexico so that deep draft ocean vessels can make it easy passage to the lower river ports on the lower river cutter head dredges work around the clock and 365 days a year digging pumping eating away great mouthfuls of dirt cutting and filling changing the rivers course produce and manufactured birds consigned to all parts of the world pass through the busy ports on the Lower Mississippi because of the open channel great ships move downriver bound for Antwerp and Naples London and Liverpool because of safe navigation wrong toes travel along the broad Mississippi and its many tributaries iron and steel southward from the eastern Midwest salt so fur and petroleum products north to the great markets of the Midwest and the East but sometimes the giant gets out of control sometimes the rich Valley lies helpless defenseless against great floods which leave terror and destruction in their wake raining storms to the north the East the West and the waters of the swollen creek Oteri's rushed to join each other at the head of the valley 1912 1913 1922 1927 yes 1927 then the giant storm down the valley in his greatest fury crops could not be planted he willed in livestock sought refuge on untapped parts of the levy scores of lives were lost rail transportation was disrupted highways and bridges were blocked off thousands of people were left homeless and destitute refugee camps were established to cope with this national disaster in response to this crisis the Congress of the United States passed the Flood Control Act of 1928 an act which was designed to permit the federal government to unify the control programs which had already been undertaken the army engineers were instructed to develop and put into effect an overall plan for controlling the floods which for years had been stripping the valley of its great wealth the broad flood control plan was no overnight accomplishment it took years of careful planning an exhaustive investigation specially trained engineers mapped and studied the Mississippi and its tributaries measure the valley of the giant precise and cut the control pattern accordingly the program is based on a flood greater than any of the valley has ever known greater than the record flood of 1927 let's superimpose this flood on the valley and see how the engineers plan to take care of it here are the features of a master plan thousands of miles of letters have been built long earth walls along the stream to hold back the overflow dams have been built giant bull wax to hold floodwater until it can be safely released flood waves have been built auxiliary channels to divert water flow when the giant storms down the valley again to align the channel and to help lower flood stages cut-offs have been made and where the river is migrating dangerously revetment have been laid to protect farmlands and threatened levees in the great alluvial Valley flood control reservoirs have been built others who are under construction on tributary streams today the Mississippi has been walled in by levee the west bank levy line begins just in okay Corrado and except for gaps where credit Ares joined the main river extends unbroken almost to the Gulf of Mexico the east bank is protected by levees alternating with high bluffs diversion of excess flow is provided by the birds point your bad red flood ways the Bonnet Carre spillway and flood waves in the Atchafalaya Basin these are the essential features of the master plan 3,500 miles of levee have been built along the Mississippi and it's tributaries a big job and one that requires much more than merely piling up earth samples of the soil on which the levee will rest are taken by field parties and brought to the district soils laboratory for analysis here delicate machines nature the physical properties of the soil each of the samples of analyzed it was also compiled and studied around research engineer to pass on valuable information to the designers in the field of sight a surveyed in state then bulldozers clear the way for the levees selling rubbing stuff so the bigger machines can go to work drag lines are widely used especially when the borrow fit is located close to the levee embankment power machines are used whether you borrow pitch is some distance from the embankment on compacted sections such as this are typical of levies constructed immediately after the passage of the 1928 Act when speed and quantity wear the governing factors in building levees these machines can dump 20 tons of dirt into the levee in one load farther away from the scene of actual construction drag lines dig dirt from selected tips and load hauling equipment the hauling equipment moves continuously the tip belly and back again at the levy site the wagons dumped their load 40,000 pounds each then the big bulldozers dressed the newly depositor fill to the design form this is the way levies are built today where compaction is the prime factor during construction engineer survey parties check the work to make sure each phase is finished to conform with contract specifications and high standards are required sodding the slopes the stuff Bermuda grass is the final step it prevents erosion this grass grows quickly in forms a protective cover against high water Mark Twain fell the Mississippi the crookedest river in the world and crooked rivers mean high flood stages navigating these bends is slow business for water as well as for boats in the early thirties the engineers began a systematic straightening of the river 16 cut-offs were made between Memphis and Baton Rouge and 170 miles were cut out of the river this new channel was straightest and the flow of water through it was stated with the result that the flood crest at Arkansas City was lowered by 14 feet lots of it and the best way to loosen soil is to blast it with dynamite monitor Jets are used to wash down material from the bank this makes the dredging job easier dredges working pairs while making the tunnel working through the neck of land toward each other the dredged material is carried through a long flexible pipeline to a point well downstream at the other end of a cut the other Greg eats its way through working steadily toward its mate the cut is not carried completely through a small section called a plug is left in place later when conditions are right the Frog is blasted the higher water above the gap flows quickly downstream the banks of a private cut are quickly eaten away and the river soon adopts its fewer and shorter course the Mississippi is a meandering river meandering rivers cave their banks and present a menace to nearby levees farms and industrial areas these caving banks present the engineer with one of his most perplexing problems the soft soil through which the Mississippi throws is easily eroded allowing the river to migrate in long loops through the valley in a lower valley revetment are used to protect weddings the first step in revetment construction is to grade the rough bank with drag lines mounted on barges the bucket digs into the steep Bank and flattens its slope carrying the material down into the screen when the ruff operation is completed pharmacies begin the final grading operation in many cases revetment extends several hundred feet into the stream before each gravelled blanket is placed where the bank is subject to wave action this prevents reaching of soft clay and silt through the revetment the revetment itself is made up of flexible math sections modern production line technique so employed the first step is to lay down a paper separator the wire mat acts as a reinforcing fabric then slaughtered steel forms are laid and the fabric is drawn up into the slots and the forms a lot before concrete is poured a forms are sprayed with oil to keep them from sticking and the concrete's removed here is an open-air assembly line a pleated mixer crux which moves down the forms filling them with concrete man Impala burner seems to finish the sections each man on this job walks ten miles during his eight-hour day the finished units are then stockpiled in the field and left to cure from the field the revetment units are carried on barges to the site of revetment construction here they are assembled on the platform of a sinking by cranes lift the units and swing them onto the way then the workers slide them on rollers into the required position each unit is securely attached to its mate then the entire section is launched to form one continuous mattress the concrete mattress extends from slightly above the waterline beyond the deepest part of the channel in many cases these revetment mattresses are more than 600 feet long when the protective mattress has been lowered to the river floor the cables are cut when the assembly barge moves upstream to place a new resection this is a highly specialized operation it requires special equipment which can only be used in this type work much River work is done by private contractors under the supervision of the engineer Corps but this operation is done by the Corps itself with hired labor paving of the upper bank begins when the underwater part of the revetment has been laid mixture of asphalt cement and sand is normally used for this purpose a belt conveyor carries the asphalt cement sand mixture from the floating asphalt back to trucks on the back and the trots move away to dump their loads into steel sleds these are then pulled up the back even behind a layer of uncontacted sand s for this blanket over lapping the concrete mattress completes the revetment which is now ready to help guide the course of the river and so the master plan goes forward in the spring and fall and the giant river awakes to begin its headlong rush to the sea these massive walls will stand as a bulwark to protect the very agriculture will flourished unharmed and the people of the valley will prosper cities formerly ravished by flood will grow stronger under the protection of the great levees and Industry can now safely bring its factories to the banks of the river you and so the future becomes one which holds new promise for the ballet and the nation the giant is being harnessed slowly but