Missouri River Navigation Channel

It’s High Time We Envisioned a Different River

In 1891, the Corps began building a six-foot deep navigation channel along the Missouri from the river’s mouth to Kansas City.  In order to constrict the Missouri’s channel area and deepen the stream to six feet, Army engineers erected thousands of pile dikes and revetments along the river’s bank line.  It took the Corps over four decades to complete that navigation channel.  On June 27, 1932, in a ceremony at Kansas City’s waterfront, the bombastic Secretary of War, Patrick Hurley, declared the channel open to barge traffic.  But barge operators stayed clear of the Missouri.  The railroads and highways between St. Louis and Kansas City carried products cheaper and faster than the river route.

In the mid-1930s, the Roosevelt administration authorized and funded the extension of the six-foot navigation channel northward to Sioux City.  Federal officials believed a longer navigation channel, which extended further inland and opened a larger market area to river traffic, would surely attract barge operators to the stream.  In 1940, the Corps completed the navigation channel to Sioux City.  But the hoped-for barge traffic still did not materialize because the railroads continued to provide a cost-effective alternative. Continue Reading »

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Extreme Highs and Lows: Climate Change and the Missouri

Since the end of the last ice age, the Missouri River has experienced extreme fluctuations in volume.  The Missouri has always bounced up and down because the weather across the Great Plains quickly shifts between hot and cold and between bone dry and monsoonal.

Since last year, Missouri Basin residents have witnessed firsthand the river’s capricious character.  In June 2011, the Upper Missouri (the river northwest of Sioux City) hauled an astounding 13.8 million-acre-feet (MAF) of water.  Never before, in 114 years of recording keeping, had the Upper Missouri carried so much water in one month. By the end of 2011, a total of 62.3 (MAF) entered the Upper Missouri.  That equaled two and a half times the upper river’s normal annual runoff of 24.8 MAF.  Last year’s runoff shattered the previous high flow record of 49 MAF, set back in 1997. Continue Reading »

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They’re Swinging Rock Along the Missouri

Recently, the Omaha District of the U.S. Army Corps of Engineers, the organization charged with overseeing the management of the reach of the Missouri River through southeast South Dakota, western Iowa, and eastern Nebraska, announced that it has begun repairing the Missouri River navigation channel between Sioux City, Iowa, and Rulo, Nebraska, a distance of 116 river miles.  During last year’s historic flood, the Missouri’s powerful currents destroyed the Army’s wingdams and revetments in dozens of locations south of Sioux City.  For example, near Tekamah, Nebraska, the Missouri blew out its riprapped banks, outflanked a series of wingdams, and cut deep side channels through soft, sugary alluvium.  At Decatur, Nebraska, the Mighty Missouri almost toppled over the Decatur Bridge after it burrowed a 50-foot deep hole into the bridge’s east abutment. Continue Reading »

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Hungry Water: Degradation and the Missouri River Flood

The Missouri River once carried impressive amounts of suspended sediment.  That sediment found its way into the stream from the prairie-pothole region of North Dakota, the badlands of South Dakota, the short-grass plains of northeastern Nebraska, and the tall grass prairies of Iowa.  It came in many forms, including fine granules of sand, tiny particles of clay, bits of pulverized coal, and even pea-sized gravel.  It floated, rolled, and spun its way downstream.  A portion of it spilled onto the valley lowlands during the Missouri’s annual floods.  Some of it became sandbars or islands.  A percentage of it flowed all the way to the Mississippi and beyond.  The Missouri acted as a conveyor belt, moving soils from the Rocky Mountains and northern plains to and thru the agricultural Midwest.  According to the U.S. Army Corps of Engineers, the annual suspended sediment load past Omaha equaled 100,375,000 tons.  That was enough goop to fill 5,500 railroad cars (with fifty ton capacities) every single day. Continue Reading »

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To Tell The Truth: Will the Real Brigadier General John McMahon Please Stand Up?

In mid-October 2011, Brigadier General John McMahon, head of the Northwestern Division, wrote a widely circulated op-ed piece on the future management of the Missouri River.  In the article, the general acknowledged that the Army’s Missouri River hydraulic system of dams, levees, and channelization structures failed to halt this year’s flood and it would not stop the next super flood.  He wrote, “We know it [the hydraulic system] cannot handle the most extreme of flood events.”

McMahon stated that additional inputs of technology (such as dams or levees) would not solve the flooding problem along the Missouri.  Instead, the Missouri basin needed a new, non-structural flood mitigation program.  Such a program should include new zoning laws limiting or prohibiting construction in the floodplain, property easements to allow the river access to its former floodplain during high flow episodes, and the repositioning of levees.  The Missouri, according to McMahon, must have more room to maneuver. Continue Reading »

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Wetlands, Farmers, and Missouri River Floods

European-American agricultural settlement had a noticeable effect on the Missouri’s hydraulic regime.  During the steamboat era, roustabouts felled the valley’s forests to provide fuel for the hundreds of steamers that worked the river.  The loss of lowland timber caused the Missouri to rise higher, faster, and more frequently than it had in the years before the advent of steamboat traffic on the river.

Valley farmers also contributed to deforestation.  They knocked down the Missouri’s wooded fringes to acquire timber for log cabins, fence posts, roofing shingles, crude furniture, containers, and tool handles.  Settlers burned kindling in cooking and heating fires.  Not coincidentally, the most voluminous Missouri River floods in the nineteenth century occurred during the busiest years of the steamboat era.  Floods passed down the valley in 1844, 1857, 1858, 1862, 1867, 1872, 1874, 1875, 1878, and 1881.  Unknown to valley residents, or at least not acknowledged by them, they had to large extent brought down the floodwaters upon themselves. Continue Reading »

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Questions for the Corps: Halting a Deluge in 2012

This fall, the Corps of Engineers is holding a series of meetings along the Missouri Valley to promote its interpretation of the flood of 2011 and to take questions from the public regarding the Army’s management of its Missouri River hydraulic system.

Since late May, Brigadier General John McMahon, Colonel Robert Ruch, and Jody Farhat have advanced a very specific interpretation of the flood, which contends: the flood was too voluminous to contain; the huge discharges from Gavin’s Point Dam resulted from freak rain events in Montana in May; the Army made no mistakes in its management of the Missouri River hydraulic system in the months preceding the deluge; and since 2010, the operation of the reservoirs for flood control trumped the seven other authorized purposes of the hydraulic system (including the storage of water for the navigation channel and hydroelectric generation).  McMahon, Ruch, and Farhat have not strayed from the above storyline.  Nor have any of them admitted that the Army holds any responsibility at all for the flood. Continue Reading »

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Reservoir Operations and the Army’s Legal Fears

In the last week of May 2011, the Army informed residents of the Missouri Valley that it planned on releasing an “unprecedented” quantity of floodwater from its Missouri River main-stem dams. Officials told a stunned public that high flows would emanate from the big dams within just days and would inundate vast portions of the valley from Montana through the state of Missouri. People wondered then, and still wonder now, how a flood of such size and duration could occur with the presence of six of the world’s largest storage reservoirs situated along the Missouri.

Since May, Brigadier General John McMahon (the overall commander for the Missouri River) Colonel Robert Ruch (the head of the Omaha District, which is charged with determining the reservoir release schedule for each of the upstream dams) and Jody Farhat (the reservoir operations manager in Omaha) have promoted a very specific interpretation of the flood of 2011. Continue Reading »

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The Decatur Dryland Bridge and the “Impetuous” Missouri

In 1946, the Burt County (Nebraska) Bridge Commission sought the approval of the federal government (which has authority over the Missouri River) to build a bridge over the river linking Decatur, Nebraska, with Onawa, Iowa.  Government officials approved the request with one stipulation.  The new bridge had to be built over the planned course of the yet-to-be-constructed navigation channel, rather than over the existing course of the river, which flowed 500 feet to the east. Continue Reading »

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Our Technology Has Failed Us

This year, the Missouri defeated the sophisticated and expensive hydraulic system built to contain it.  Neither the Army’s gigantic earthen dams, high levees, nor its thousands of pile dikes and revetments could stop the Missouri from inundating its valley from Montana south to the state of Missouri.  This is not the first time the Missouri has confounded the efforts of the Army to control it.  As a matter of fact, the river has defied the federal engineers since the nineteenth century – and it will do so again.  It is why the Missouri is known as the “Mighty Mo.” Continue Reading »

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    • "Dakota Country" will publish one of my articles in an upcoming issue. It examines the Army's past efforts at widening the Lower Missouri. 3 months ago

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