The Army Corps of Engineers, in its written authorization to blow up the levee at Caernarvon, Louisiana, said it would have preferred to wait and see if the Mississippi River lowered on its own. But the Corps felt compelled to approve the dynamiting "for the psychological effect."
The hydraulic necessity was debatable. The psychological effect was the point.
It is the most honest thing anyone in authority said during the entire affair. On April 29, 1927, thirty-nine tons of dynamite opened the levee thirteen miles below Canal Street, flooding St. Bernard and Plaquemines parishes to relieve pressure on New Orleans. Nearly ten thousand people were displaced. The next day, the Glasscock levee on the river's west bank broke on its own, releasing massive amounts of floodwater through the Atchafalaya Basin to the Gulf and relieving the very pressure the dynamiting was supposed to address. It is largely believed that the New Orleans levees would have held without the Caernarvon crevasse. The sacrifice, in all probability, was unnecessary. But the psychological effect had been achieved. Confidence was restored. The bankers felt better.
The Decision Before the Deliberation
By mid-April 1927, the Mississippi River was doing something no one alive had seen before. Weeks of rain across the entire drainage basin had pushed the river to historically unprecedented levels. Levees had already broken at dozens of points upstream. Between Baton Rouge and New Orleans, more than twenty thousand men were sandbagging levees around the clock, and the water kept rising. After a similar flood threatened the city in 1922, Army Corps Chief Edgar Jadwin had directed the Board of Liquidation to blow a hole in the levee if something like it ever happened again. Now something worse than 1922 was happening, and the men who ran New Orleans knew it.
On Good Friday, April 15, fifteen inches of rain fell on the city in eighteen hours. A power outage knocked out the Wood pumps that drained the streets, and water rose four feet in parts of town. While the pumps were still down, members of the city's banking community met with Marcel Garsaud, manager of the Dock Board. Garsaud told them he could guarantee the safety of New Orleans by dynamiting a levee elsewhere. The rural communities around that levee would be destroyed, but the city would be safe.
One of the bankers said what everyone in the room was thinking:
"Only dynamite will restore confidence."
The man who turned that sentiment into action was James Pierce Butler, president of Canal Bank, the largest bank in the South. Raised on a family plantation in Natchez, educated at Tulane, Butler sat on the Board of Liquidation of the City Debt, an entity with extraordinary control over New Orleans's finances. He concluded the meeting by suggesting they involve the authorities. Mayor Arthur O'Keefe agreed to abide by the bankers' wishes and appointed Butler chairman of the newly created Citizens Flood Relief Committee, charged with all matters involving the flood. The committee was composed mostly of the city's business elite.
The bankers decided. The mayor ratified. Then the committee was formed to execute what had already been determined. The question of whether to sacrifice the downriver parishes was settled before any public body deliberated it.
On April 19, politicians, business owners, and bankers met at City Hall to formalize preparations. According to documented accounts in the 1927 flood heritage record, no representatives from St. Bernard or Plaquemines Parish were invited. The plan to blow the levee at Poydras, near Caernarvon, was confirmed.
There were reasons to wait. Even before the blast, some engineers doubted the breach would protect New Orleans, while others pointed out that natural crevasses farther upriver were already reducing pressure on the downstream levees. The Corps itself, in its written approval, said it would have preferred to see whether the river would lower without intervention. But the bankers had heard from financial institutions in New York and London concerned about their investments in the city, and they advanced the plan on principle. The psychological effect could not wait for the river to make up its mind.
James Thomson, a newspaper publisher and fellow Board of Liquidation member, carried the plan to Washington and presented it to Secretary of War Dwight Davis and Army Corps Chief Jadwin. Davis said that if the governor of Louisiana sent a formal request, the federal government would take it into consideration. Governor Oramel H. Simpson agreed on April 24, but attached three conditions: a written statement from the Army Corps that the dynamiting was necessary, legal opinions confirming his authority to order it, and written agreements from New Orleans promising full compensation to anyone who suffered damage.
All three conditions were met on paper. The state and city agreed to "compensate any and all persons who may suffer damage as a result of this act."
Remember those three conditions.
What the Parish Knew
The documentary record of what happened inside St. Bernard Parish in those days is thin compared to the detailed accounts of the bankers' deliberations. The archive is rich on the men in the room and nearly silent on the people downstream. But nearly silent is not entirely silent.
It did not take long for the rumors confirmed at City Hall to trickle into St. Bernard Parish. The parish had recently endured the Trappers' War, a violent factional conflict. Now the factions united. Over five hundred armed men began patrolling the levees with orders to shoot anyone approaching suspiciously. A community meeting drew more than six hundred people, with more who would have attended had they not been on levee patrol. One man opened by shouting: "Where do they get the authority to drown us out, to deprive us of our homes and our living? We had enough of it in 1922. We won't stand for it!" The meeting, documented in period coverage and cited in Barry's Rising Tide, sent a wire to Butler protesting the action and what they called the "utterly insufficient provision for compensation in full for personal and property damages."
Butler and other bankers responded by agreeing to provide a $2 million loan fund prior to the settlement of claims. The parish, facing the full weight of city, state, and federal authority, accepted. They didn't have a choice and they knew it.
Sheriff L.A. Meraux of St. Bernard Parish told the New Orleans States:
"We're letting them do it because we can't stop them. You can't fight the Government."
On April 26, Governor Simpson ordered the cut. Residents were given three days to gather their belongings and leave, with the understanding that displacement would be temporary. The National Guard patrolled the levees. A plane flew overhead. A flotilla of four submarine chasers stood at anchor. Most of the nearly ten thousand displaced residents did not own cars. Lyle Saxon, reporting for the Times-Picayune, described the exodus: while parents loaded mattresses and tables on wagons, children gathered their dolls and pet kittens into their arms and looked back at their homes. "There was not much time for sentimentalizing or leave-taking."
Some residents refused to leave. Some armed themselves and fired shots at approaching officials. Reportedly, shots came close to Herbert Hoover, then Secretary of Commerce. Those without relatives elsewhere were brought to a warehouse in New Orleans. White residents were housed on the fifth floor, Black residents on the sixth.
Thirty-Nine Tons
At 2:17 p.m. on April 29, 1927, engineers detonated the first charges at the Caernarvon levee. It took several blasts and several hours to open the breach. Reporters and spectators had traveled from across the country to witness it. The Atlanta Journal reported that "a situation so serious that it was deemed necessary to deliberately break the dykes for the first time in history has served to focus the eyes of the world upon this city, but the spectacular rush of waters, sweeping all before its fury, failed to materialize."
Sheriff Meraux was present. According to an interview conducted by journalist Meigs O. Frost and published in Saxon's contemporaneous account Father Mississippi (1927), Meraux watched the river spill into his parish and said:
"Gentlemen, you have seen today the public execution of this parish."
That is one of the only documented sentences from inside the community that absorbed the flood. The bankers' deliberations fill chapters. The parish's experience survives in fragments.
The next day, April 30, the Glasscock levee on the Mississippi's west bank broke upriver, releasing floodwaters through the Atchafalaya Basin to the Gulf. Several other major levee breaks upstream followed. The pressure on the New Orleans levees dropped. The city, in all likelihood, would have been spared without the Caernarvon crevasse. How quickly the decision-makers understood this is not well documented. What is documented is the community's understanding. As historian Richard Mizelle writes, the people who lost their property saw the flood as an avoidable, man-made catastrophe. They were almost certainly right.
The Promise and the Ledger
The dynamiting was the decision. The compensation process revealed what the decision actually meant.
The majority of St. Bernard and Plaquemines parish residents were of French and Spanish ancestry. The dominant industries were fur trapping, fishing, and hunting. The flood destroyed approximately seventy percent of the region's muskrat population, the economic foundation of the trapping industry. Claims totaling $35 million were filed.
Now here is where a person might want to pay close attention to who was sitting where.
The entity that processed those claims was the Board of Liquidation of the City Debt, controlled by Butler and J. Blanc Monroe, a lawyer and board member of Whitney Bank. The same men who had authorized the dynamiting now administered the fund meant to compensate its victims. No neutral state or federal body handled the claims independently. The men who ordered the execution, to borrow Meraux's word, also ran the estate settlement.
Monroe agreed to pay $3.9 million, minus $1 million for food and housing costs that the Citizens Flood Relief Committee had provided to displaced residents during the flood. According to Mizelle's Backwater Blues (2014), the committee deducted food allotments from final settlements. You flood a man's home, you feed him in a warehouse, and then you subtract the cost of the food from what you owe him for the home.
$35 million in claims filed. $2.9 million paid. The bulk went to the Acme Land and Fur Company. Individual displaced residents received an average of roughly $274 each. Some received nothing.
Most individual claimants settled for pennies on the dollar. The refugees, as Mizelle documents, were caught between a system of legalities they did not understand and marshes still filled with water that kept them from going home. None received compensation for loss of income.
When residents sued, the courts finished what the compensation process had started. In Alfred Oliver & Co. v. Board of Commissioners Orleans Levee District (169 La. 438) and the related Foret v. Board (169 La. 427), the Louisiana Supreme Court held that there was no right to recover for lost livelihood. Related claims were still being litigated as late as 1933, when Ruiz v. Board of Levee Commissioners was decided against the claimants in the Louisiana Court of Appeal. The legal system confirmed, over years, what the compensation process had demonstrated in months: the promise of full restitution was the price of political consent, not a binding obligation.
The Governor's Three Conditions
Governor Simpson's three conditions, the ones that were all met on paper.
The written statement of necessity was provided, though the Corps itself said it would have preferred to wait, and authorized the action for the psychological effect. The Glasscock break the next day proved the Corps's instinct correct.
The legal authority was confirmed. The courts would later use that same legal framework to deny the victims' claims, holding that the people whose livelihoods were destroyed had no right to recover for them.
The written promise of compensation was signed by men who then controlled the process that reduced $35 million to $2.9 million, deducted the cost of feeding the displaced from what they were owed, and gave the bulk of what remained to a fur company.
Every condition was satisfied on paper. Every promise was broken in practice. And the breaking was administered by the same hands that made the promises, through the same institutional machinery that had been set up to keep them.
What the Archive Keeps
The documentary record preserves, in meticulous detail, the deliberations of the men who made the decision, the financial mechanics of the committee they controlled, and the legal reasoning of the courts that ratified the outcome. The primary scholarly accounts, Barry's Rising Tide (1997) and Mizelle's Backwater Blues (2014), draw on archived committee records, New Orleans newspaper coverage, and government documents. The story is thoroughly documented from the perspective of the people who held power.
What the record does not preserve, in anything close to equivalent detail, is the experience of the community that absorbed the flood. We have the wire to Butler. We have the man shouting at the parish meeting, recorded in newspaper accounts written by reporters from New Orleans. We have Saxon's description of children carrying kittens, written by a Times-Picayune journalist on assignment. We have Meraux's two statements, both recorded by reporters from New Orleans papers interviewing a parish official, not by anyone from inside the community documenting their own experience.
The trapping families who lost their marshes, the fishermen who lost their waters, the people who took roughly $274 or nothing because they couldn't afford lawyers and couldn't go home. Their accounts, if they existed, did not survive in the places where historical records get kept.
The people who controlled the levees, the committee, the compensation fund, and the courts also controlled, by default, what got written down and what got preserved. The silence in the archive is the last artifact of the same arrangement that produced the dynamiting and the compensation betrayal. The power to decide which community drowns and the power to determine whose account of the drowning survives turn out to be the same power, exercised by the same people, through the same institutions.
Thirty-five million dollars in claims. Two point nine million paid. Most of it to a company. The rest to people who had been promised full compensation by the governor of their state and the most powerful bankers in their city.
The promise was the instrument that made the sacrifice possible. And the record of that promise, and its betrayal, is kept with unintentional precision in the filing cabinets of the men who made it. The parish left behind one sentence, spoken by its sheriff to a visiting journalist, while the river poured through the hole in the levee: "Gentlemen, you have seen today the public execution of this parish."
That is what the archive contains. The rest is silence.
- The liability chain survived: The Flood Control Act of 1928, written in direct response to the 1927 disaster, included a sovereign immunity provision that shielded the Army Corps from financial liability even after a federal judge found the Corps negligent in the Katrina levee failures of 2005, in the same St. Bernard Parish geography.
- The sediment cutoff continues: Congress ordered the Corps to prevent another 1927, and by the mid-1930s the river was sealed in levees that cut off the sediment supply sustaining the Louisiana delta, a process of land subsidence that has never stopped and now compounds sea-level rise.
- The racial geography upstream: While Caernarvon's parishes were sacrificed by dynamite, thousands of Black farmworkers near Greenville, Mississippi were detained on levees for forced labor while white families evacuated by train, a parallel sacrifice decision by different actors operating under the same logic about whose safety was expendable.
- Flood-prone land as inheritance: The Texas Freedom Colonies Project has identified over 557 Black settlements founded between 1865 and 1930, many established on flood-prone bottomlands that were the only parcels available to formerly enslaved people, a climate vulnerability that traces directly to Reconstruction-era land allocation.