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On this day, April 16, 1947, the SS Grandcamp, filled with ammonium nitrate, blew up in Texas City.
Fri Apr 16, 2021: On this day, April 16, 1947, the SS Grandcamp, filled with ammonium nitrate, blew up in Texas City.
Hat tip, the Roanoke Times
In 1947, the cargo ship Grandcamp blew up in the harbor in Texas City, Texas, and more events that happened on this day in history.
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Related:
Sat Mar 18, 2023: On this day, March 18, 1937, the New London School explosion occurred.
Thu Mar 18, 2021: On this day, March 18, 1937, the New London School explosion occurred.
New London School explosion
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The New London School explosion occurred on March 18, 1937, when a natural gas leak caused an explosion, destroying the London School of New London, Texas, a community in Rusk County previously known as "London". The disaster killed more than 295 students and teachers. As of 2017, the event is the third deadliest disaster in the history of Texas, after the 1900 Galveston hurricane and the 1947 Texas City disaster.
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The New London School explosion occurred on March 18, 1937, when a natural gas leak caused an explosion, destroying the London School of New London, Texas, a community in Rusk County previously known as "London". The disaster killed more than 295 students and teachers. As of 2017, the event is the third deadliest disaster in the history of Texas, after the 1900 Galveston hurricane and the 1947 Texas City disaster.
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Texas City disaster
The SS Wilson B. Keene, destroyed in the disaster's second explosion
The 1947 Texas City disaster was an industrial accident that occurred on April 16, 1947, in the Port of Texas City, Texas, at Galveston Bay. It was the deadliest industrial accident in United States history and one of history's largest non-nuclear explosions. A mid-morning fire started on board the French-registered vessel SS Grandcamp (docked in the port) and detonated her cargo of about 2,300 tons (about 2,100 metric tons) of ammonium nitrate. This started a chain reaction of fires and explosions in other ships and nearby oil-storage facilities, ultimately killing at least 581 people, including all but one member of the Texas City fire department.
The disaster drew the first class action lawsuit against the United States government, on behalf of 8,485 victims, under the 1946 Federal Tort Claims Act.
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Fire
On April 16, 1947, around 8:00 a.m., smoke was spotted in the cargo hold of the Grandcamp while she was still moored. Over the next hour, attempts to extinguish the fire or bring it under control failed, as a red glow returned after each effort to douse the fire.
Shortly before 9:00 a.m., the captain ordered his men to steam the hold, a firefighting method where steam is piped in to extinguish fires, in order to preserve the cargo. This was unlikely to be effective, as ammonium nitrate is an oxidizer, thus neutralizing the extinguishing properties of steam. The steam may have contributed to the fire by converting the ammonium nitrate to nitrous oxide, while augmenting the already intense heat in the ship's hold.
The fire attracted spectators along the shoreline, who believed they were at a safe distance. Eventually, the steam pressure inside the ship blew the hatches open, and yellow-orange smoke billowed out. This color is typical for nitrogen dioxide fumes. The unusual color of the smoke attracted more spectators. Spectators also noted that the water around the docked ship was boiling from the heat, and the splashing water touching the hull was being vaporized into steam. The cargo hold and deck began to bulge as the pressure of the steam increased inside.
Explosion
This 2-ton anchor was thrown more than 1.6 miles when the Grandcamp exploded
At 9:12 a.m., the ammonium nitrate reached an explosive threshold from the combination of heat and pressure. The vessel detonated, causing great destruction and damage throughout the port. The tremendous blast produced a 15-foot (4.5 m) wave that was detectable nearly 100 miles (160 km) from the Texas shoreline. The blast leveled nearly 1,000 buildings on land. The Grandcamp explosion destroyed the Monsanto Chemical Company plant and resulted in ignition of refineries and chemical tanks on the waterfront. Falling bales of burning twine from the ship's cargo added to the damage, and the Grandcamp's anchor was hurled across the city. Two sightseeing airplanes flying nearby were blown out of the sky, while 10 miles (16 km) away, half of the windows in Galveston were shattered. The explosion blew the almost 6,350 short tons (5,760 metric tons) of the ship's steel into the air, some at supersonic speed.
Official casualty estimates came to a total of 567, including all the crewmen who remained aboard the Grandcamp. All but one member of the 28-man Texas City volunteer fire department were killed in the initial explosion on the docks while fighting the shipboard fire. With fires raging throughout Texas City, first responders from other areas were initially unable to reach the site of the disaster.
The first explosion ignited ammonium nitrate in the nearby cargo ship High Flyer. The crews spent hours attempting to cut the High Flyer free from her anchor and other obstacles, in order to move her, without success. After smoke had been pouring from the hold for over 5 hours, and about 15 hours after the explosions aboard the Grandcamp, the High Flyer exploded, demolishing the nearby SS Wilson B. Keene, killing at least two more people and increasing the damage to the port and other ships with more shrapnel and burning material. One of the propellers on the High Flyer was blown off and subsequently found nearly a mile inland. It is now part of a memorial park and is located near the anchor of the Grandcamp. The propeller is cracked in several places, and one blade has a large piece missing.
The cause of the initial fire on board the Grandcamp was never determined. It may have been started by a cigarette discarded the previous day, meaning the ship's cargo had been smouldering throughout the night when the fire was discovered on the morning of the day of the explosion.
Scale of the disaster
A five-story rubber factory beside slip #1
The Texas City disaster is generally considered the worst industrial accident in American history. Witnesses compared the scene to the fairly recent images of the 1943 air raid on Bari and the much larger devastation after the atom bomb was dropped at Nagasaki.
Of the dead, 405 were identified and 63 have never been identified. The latter remains were placed in a memorial cemetery in the north part of Texas City near Moses Lake. An additional 113 people were classified as missing, for no identifiable parts were ever found. This figure includes firefighters who were aboard Grandcamp when she exploded. There is some speculation that there were hundreds more killed but uncounted, including visiting seamen, non-census laborers and their families, and an untold number of travelers. But there were also some survivors among people as close as 70 feet (21 m) from the dock. The victims' bodies quickly filled the local morgue. Several bodies were laid out in the local high school's gymnasium for identification by family or friends.
Parking lot 1?4 mile (400 m) away from the explosion
More than 5,000 people were injured, with 1,784 admitted to 21 area hospitals. More than 500 homes were destroyed and hundreds damaged, leaving 2,000 homeless. The seaport was destroyed, and many businesses were flattened or burned. Over 1,100 vehicles were damaged and 362 freight cars were obliterated; the property damage was estimated at $100 million (equivalent to $1.1 billion in 2019).
A 2-short-ton (1.8-metric-ton) anchor of Grandcamp was hurled 1.62 miles (2.61 km) and found in a 10-foot (3 m) crater. It was installed at a memorial park. The other main 5-short-ton (4.5-metric-ton) anchor was hurled 1?2 mile (800 m) to the entrance of the Texas City Dike. It rests on a "Texas-shaped" memorial at the entrance. Burning wreckage ignited everything within miles, including dozens of oil storage tanks and chemical tanks. The nearby city of Galveston, Texas, was covered with an oily fog that left deposits over every exposed outdoor surface.
Firefighting casualties
Texas City Disaster Firemen Memorial
Some of the deaths and damage in Texas City were due to the destruction and subsequent burning of several chemical plants (including Monsanto and Union Carbide), oil storage, and other facilities near the explosions. 27 of the 28 members of Texas City's volunteer fire department and 3 of 4 members of the Texas City Heights Volunteer Fire Department who were on the docks near the burning ship were killed. One firefighter, Fred Dowdy, who had not responded to the initial call, coordinated other firefighters arriving from communities up to 60 miles (100 km) away. Alvin Fussell, sole survivor of the Heights Volunteer fire fighters, was driving to work in Alvin when he heard of the fire on the radio. Eventually 200 firefighters arrived, from as far away as Los Angeles. Fires resulting from the cataclysmic events were still burning a week after the disaster, and the process of body recovery took nearly a month. All four fire engines of Texas City were twisted and burned husks.
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The SS Wilson B. Keene, destroyed in the disaster's second explosion
The 1947 Texas City disaster was an industrial accident that occurred on April 16, 1947, in the Port of Texas City, Texas, at Galveston Bay. It was the deadliest industrial accident in United States history and one of history's largest non-nuclear explosions. A mid-morning fire started on board the French-registered vessel SS Grandcamp (docked in the port) and detonated her cargo of about 2,300 tons (about 2,100 metric tons) of ammonium nitrate. This started a chain reaction of fires and explosions in other ships and nearby oil-storage facilities, ultimately killing at least 581 people, including all but one member of the Texas City fire department.
The disaster drew the first class action lawsuit against the United States government, on behalf of 8,485 victims, under the 1946 Federal Tort Claims Act.
{snip}
Fire
On April 16, 1947, around 8:00 a.m., smoke was spotted in the cargo hold of the Grandcamp while she was still moored. Over the next hour, attempts to extinguish the fire or bring it under control failed, as a red glow returned after each effort to douse the fire.
Shortly before 9:00 a.m., the captain ordered his men to steam the hold, a firefighting method where steam is piped in to extinguish fires, in order to preserve the cargo. This was unlikely to be effective, as ammonium nitrate is an oxidizer, thus neutralizing the extinguishing properties of steam. The steam may have contributed to the fire by converting the ammonium nitrate to nitrous oxide, while augmenting the already intense heat in the ship's hold.
The fire attracted spectators along the shoreline, who believed they were at a safe distance. Eventually, the steam pressure inside the ship blew the hatches open, and yellow-orange smoke billowed out. This color is typical for nitrogen dioxide fumes. The unusual color of the smoke attracted more spectators. Spectators also noted that the water around the docked ship was boiling from the heat, and the splashing water touching the hull was being vaporized into steam. The cargo hold and deck began to bulge as the pressure of the steam increased inside.
Explosion
This 2-ton anchor was thrown more than 1.6 miles when the Grandcamp exploded
At 9:12 a.m., the ammonium nitrate reached an explosive threshold from the combination of heat and pressure. The vessel detonated, causing great destruction and damage throughout the port. The tremendous blast produced a 15-foot (4.5 m) wave that was detectable nearly 100 miles (160 km) from the Texas shoreline. The blast leveled nearly 1,000 buildings on land. The Grandcamp explosion destroyed the Monsanto Chemical Company plant and resulted in ignition of refineries and chemical tanks on the waterfront. Falling bales of burning twine from the ship's cargo added to the damage, and the Grandcamp's anchor was hurled across the city. Two sightseeing airplanes flying nearby were blown out of the sky, while 10 miles (16 km) away, half of the windows in Galveston were shattered. The explosion blew the almost 6,350 short tons (5,760 metric tons) of the ship's steel into the air, some at supersonic speed.
Official casualty estimates came to a total of 567, including all the crewmen who remained aboard the Grandcamp. All but one member of the 28-man Texas City volunteer fire department were killed in the initial explosion on the docks while fighting the shipboard fire. With fires raging throughout Texas City, first responders from other areas were initially unable to reach the site of the disaster.
The first explosion ignited ammonium nitrate in the nearby cargo ship High Flyer. The crews spent hours attempting to cut the High Flyer free from her anchor and other obstacles, in order to move her, without success. After smoke had been pouring from the hold for over 5 hours, and about 15 hours after the explosions aboard the Grandcamp, the High Flyer exploded, demolishing the nearby SS Wilson B. Keene, killing at least two more people and increasing the damage to the port and other ships with more shrapnel and burning material. One of the propellers on the High Flyer was blown off and subsequently found nearly a mile inland. It is now part of a memorial park and is located near the anchor of the Grandcamp. The propeller is cracked in several places, and one blade has a large piece missing.
The cause of the initial fire on board the Grandcamp was never determined. It may have been started by a cigarette discarded the previous day, meaning the ship's cargo had been smouldering throughout the night when the fire was discovered on the morning of the day of the explosion.
Scale of the disaster
A five-story rubber factory beside slip #1
The Texas City disaster is generally considered the worst industrial accident in American history. Witnesses compared the scene to the fairly recent images of the 1943 air raid on Bari and the much larger devastation after the atom bomb was dropped at Nagasaki.
Of the dead, 405 were identified and 63 have never been identified. The latter remains were placed in a memorial cemetery in the north part of Texas City near Moses Lake. An additional 113 people were classified as missing, for no identifiable parts were ever found. This figure includes firefighters who were aboard Grandcamp when she exploded. There is some speculation that there were hundreds more killed but uncounted, including visiting seamen, non-census laborers and their families, and an untold number of travelers. But there were also some survivors among people as close as 70 feet (21 m) from the dock. The victims' bodies quickly filled the local morgue. Several bodies were laid out in the local high school's gymnasium for identification by family or friends.
Parking lot 1?4 mile (400 m) away from the explosion
More than 5,000 people were injured, with 1,784 admitted to 21 area hospitals. More than 500 homes were destroyed and hundreds damaged, leaving 2,000 homeless. The seaport was destroyed, and many businesses were flattened or burned. Over 1,100 vehicles were damaged and 362 freight cars were obliterated; the property damage was estimated at $100 million (equivalent to $1.1 billion in 2019).
A 2-short-ton (1.8-metric-ton) anchor of Grandcamp was hurled 1.62 miles (2.61 km) and found in a 10-foot (3 m) crater. It was installed at a memorial park. The other main 5-short-ton (4.5-metric-ton) anchor was hurled 1?2 mile (800 m) to the entrance of the Texas City Dike. It rests on a "Texas-shaped" memorial at the entrance. Burning wreckage ignited everything within miles, including dozens of oil storage tanks and chemical tanks. The nearby city of Galveston, Texas, was covered with an oily fog that left deposits over every exposed outdoor surface.
Firefighting casualties
Texas City Disaster Firemen Memorial
Some of the deaths and damage in Texas City were due to the destruction and subsequent burning of several chemical plants (including Monsanto and Union Carbide), oil storage, and other facilities near the explosions. 27 of the 28 members of Texas City's volunteer fire department and 3 of 4 members of the Texas City Heights Volunteer Fire Department who were on the docks near the burning ship were killed. One firefighter, Fred Dowdy, who had not responded to the initial call, coordinated other firefighters arriving from communities up to 60 miles (100 km) away. Alvin Fussell, sole survivor of the Heights Volunteer fire fighters, was driving to work in Alvin when he heard of the fire on the radio. Eventually 200 firefighters arrived, from as far away as Los Angeles. Fires resulting from the cataclysmic events were still burning a week after the disaster, and the process of body recovery took nearly a month. All four fire engines of Texas City were twisted and burned husks.
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