Memphis tanker truck disaster

Last updated
Memphis tanker truck disaster
Memphis tanker explosion.jpg
The tank among damaged structures
Details
DateDecember 23, 1988
c. 10:15am (CST)
Location I-40/I-240 Midtown Interchange, Memphis, Tennessee
Coordinates 35°09′05.6″N90°01′17.3″W / 35.151556°N 90.021472°W / 35.151556; -90.021472
CountryUnited States
Incident type Traffic collision, tanker truck explosion
CauseLoss of control of tanker truck by driver, BLEVE
Statistics
Vehicles~20
Deaths9
Injured10

On December 23, 1988, a tractor-trailer tanker truck hauling liquefied propane crashed on an exit ramp at the Interstate 40/Interstate 240 (I-40/I-240) interchange in downtown Memphis, Tennessee, US. The crash ruptured the tank; the leaking gas exploded, setting multiple vehicles and structures on fire. The explosion propelled the tank 125 yards (114 m) into a residential complex and started additional fires. The accident caused nine deaths and ten injuries. The interchange where the accident occurred was considered unsafe and poorly designed, and had been the site of several previous accidents; it was completely rebuilt in the 2000s.

Contents

Background

The accident occurred at the interchange in Midtown Memphis between I-40 and the western terminus of I-240. Approaching this interchange from the west, I-40 travels in an east–west alignment and shifts into a north–south alignment at this interchange. I-240 also meets the interchange from a north–south alignment. [1] The interchange was first constructed in the latter 1960s, and opened to traffic on July 14, 1971. [2] At this time, it was planned as a four-way interchange; I-40 was to continue straight through the interchange in an east–west alignment, and I-240 was to continue north of the interchange on what is now I-40. [3] Many residents opposed the routing east of this interchange because it was slated to pass through Overton Park, and filed a series of lawsuits to stop the interstate's construction. [4] These lawsuits culminated in the 1971 U.S. Supreme Court case Citizens to Preserve Overton Park v. Volpe , [5] and in 1981 the Tennessee Department of Transportation (TDOT) abandoned plans to route I-40 east of this interchange. [6] Instead, the department redesignated the northern loop of I-240 north of this interchange as part of I-40. [4] As a result of the original plans, however, the interchange was constructed as a four-way combination interchange, and contained several unused ramps and bridges that had been intended to carry traffic to and from I-40 east of the interchange. [3] [4] I-40 traffic both continuing through the interchange and exiting onto I-240 was required to use one-lane ramps, some with hazardously sharp curves. [7] The ramp where the accident occurred was a flyover ramp with an advisory speed limit of 25 miles per hour (40 km/h). [8] At the time of the accident, the entire interchange was considered one of the most dangerous in the state and had a crash rate much higher than the state average. [9] TDOT had begun preliminary work in early 1988 for a project to reconstruct the interchange, estimated to cost US$100 million at the time (equivalent to $215 million in 2022 [10] ). [8]

Accident

The vehicle involved in the accident was a 1986 Mack Econodyne tractor towing a 10,450-US-gallon (39,600 L) steel tank manufactured in 1964, loaded with 9,511 US gallons (36,000 L) of pressurized liquified propane. On December 23, 1988, at approximately 10:15 a.m. Central Time, the semi-trailer truck skidded off a ramp carrying traffic on I-40 eastbound at the Midtown interchange in Memphis, rolled about 1 1/4 times, and crashed into a retaining wall at the base of an overpass. [11] [12] The crash punctured a small hole in the front end of the tank. Leaking propane quickly enveloped both sides of the interstate in a vapor cloud, which ignited seconds later in a boiling liquid expanding vapor explosion (BLEVE) which produced a fireball estimated to be about 700 feet (210 m) wide and 700 to 800 feet (210 to 240 m) tall. [13] This set nearby vehicles and buildings on fire and instantly killed five motorists, including the driver of the truck. [14] [15] The tank was then propelled from the highway by the remaining rapidly escaping and combusting gas inside of the tank, causing it to strike a nearby overpass bridge before exiting the freeway right-of-way, bouncing off the ground, striking the top of a tree, and crashing into a duplex about 125 yards (114 m) away from the crash site. This instantly killed an occupant of the complex and started a fire which subsequently spread to multiple other buildings and cars. [16] As the tank became airborne, most of the tractor was propelled into the southbound lanes of I-40. [11] Other parts of the truck, including tires and an axle, were hurled from the crash site into nearby homes. The crash created a traffic jam that extended several miles in all directions, and about one hour after the crash, a truck on I-240 northbound crashed into stopped vehicles at the south end of the traffic congestion, killing the driver. [17] In addition to the truck, seven cars were completely destroyed by the explosion. [11] Ten other cars, seven houses, and one industrial building were damaged by the explosion and subsequent fires. [16] [11] Ten people were injured, and two people who were inside homes impacted by the crash died the following day from their injuries. [18] Several of the injured were treated for severe burns, and some of the deceased victims were burned beyond recognition. [19]

Investigation and aftermath

Diagram of the crash. Note that I-40 is referred to as I-240 on the right side. Memphis tank truck disaster diagram.png
Diagram of the crash. Note that I-40 is referred to as I-240 on the right side.

Investigators from the National Transportation Safety Board arrived on the scene the following day. They determined that the truck had passed an inspection in Arkansas the day before the accident, and that the driver was familiar with the route. [20] The driver, an employee of Wooten Transports, had picked up the load in nearby West Memphis, Arkansas, and was en route to Ellendale, about 20 miles (32 km) northeast of Memphis. [12]

Authorities identified the deceased motorists as Randall Benson (29, driver of the tanker truck) of West Memphis, Arkansas, Harrison G. Lee (34) of Brighton, Tennessee, Robert Wardlow (40) of Memphis, Tina Wiles (30) and Warner Wiles (70), both of Vicksburg, Mississippi, and David Bailey (29, driver of second truck) of West Helena, Arkansas. Shelanda Towles (10), Iva J. Rubesheim (87), and James M. Malone (57) were identified as the deceased occupants of the homes which were impacted by the blast. [20]

The National Fire Protection Agency (NFPA) investigated the accident and released its report on February 6, 1990. The report determined that the exact cause of both the explosion and the leakage that caused the explosion were unknown, but theorized that the tank may have been punctured by a vertical guardrail post when the truck was rolling, and the vapor may have been ignited in a house that the cloud had expanded into. [11] Between June 2003 and December 2006, TDOT spent $53 million to completely reconstruct the interchange where the accident occurred. [21] The unused ramps and bridges were demolished, and the interchange was converted into a directional T interchange. [22] In addition, the interchange with SR 14 (Jackson Avenue) on I-40 directly north of the interchange was modified, and multiple auxiliary lanes and slip ramps were constructed to improve traffic flow and reduce crashes caused by sudden lane changes. Before the project could begin, TDOT had to acquire additional right-of-way. This was opposed by some residents of the area, delaying the start of the project by several years. [21]

See also

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References

  1. ↑ Long Range Planning Division Office of Data Visualization (2018). Shelby County (PDF) (Map). Tennessee Department of Transportation.
  2. ↑ "Open At Last (Illustration)". The Commercial Appeal. Memphis. July 14, 1971. p. 19 – via Newspapers.com.
  3. 1 2 "I-40/I-240 Midtown Interchange". Tennessee Department of Transportation. 2003. Archived from the original on April 5, 2004. Retrieved February 16, 2020.
  4. 1 2 3 Risher, Wayne (June 28, 1998). "I-40 vs. the Park: Who Was Right? Overton Decision Brought Tradeoff". The Commercial Appeal. Memphis. p. A1, A16, A17 . Retrieved November 18, 2021– via Newspapers.com.
  5. ↑ Citizens to Preserve Overton Park v. Volpe , 401U.S.402 (U.S. Supreme Court1971).
  6. ↑ McNichol, Dan (2006). The Roads that Built America: The Incredible Story of the U.S. Interstate System. New York: Sterling Publishing. pp. 159–160. ISBN   9781402734687 – via Google Books.
  7. ↑ "Site of tanker blast set to be redesigned". The Jackson Sun. Associated Press. December 28, 1988. p. 12. Retrieved January 18, 2021– via Newspapers.com.
  8. 1 2 "Memphis City Council Wants Quick Redesign of Ramp Where Tanker Exploded". Associated Press. December 27, 1988.
  9. ↑ "Investigators seek clues to cause of explosion". Kingsport Times-News. Associated Press. December 27, 1988. p. 3B. Retrieved January 16, 2021– via Newspapers.com.
  10. ↑ Johnston, Louis; Williamson, Samuel H. (2023). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved November 30, 2023. United States Gross Domestic Product deflator figures follow the Measuring Worth series.
  11. 1 2 3 4 5 Michael S. Isner (February 6, 1990). Fire Investigation Report: Propane Tank Truck Incident, Eight People Killed, Memphis, Tennessee, December 23, 1988 (Report). National Fire Protection Association. Archived from the original on January 28, 2021. Retrieved January 18, 2021.
  12. 1 2 "Road test passed by tanker". Johnson City Press. Associated Press. December 26, 1988. p. 3. Retrieved January 16, 2021– via Newspapers.com.
  13. ↑ Baird, Woody (December 23, 1988). "Tanker Explodes in Downtown Memphis, Killing At Least Five". Associated Press. Retrieved January 12, 2021.
  14. ↑ Serafino, Phil (December 23, 1988). "A propane tanker truck crashed into a bridge support..." United Press International. Retrieved January 12, 2021.
  15. ↑ "Propane Truck Blows Up; 8 Die, 10 Hurt". Los Angeles Times. December 24, 1988. Retrieved January 12, 2021.
  16. 1 2 Baird, Woody (December 24, 1988). "Tanker Exploded 'Like An Unguided Missile'; Eight Dead". Associated Press. Retrieved January 12, 2021.
  17. ↑ "7 Die As Propane Truck Explodes and Traffic Backup Causes 2nd Wreck". The Washington Post. December 23, 1988. Retrieved January 12, 2021.
  18. ↑ "Death Toll at 9 in Memphis Tanker Explosion". The New York Times. Associated Press. December 25, 1988. Retrieved January 12, 2021.
  19. ↑ Mason Jr., Winslow M. (December 24, 1988). "Six dead in truck explosion; Neighborhood becomes war zone". The Jackson Sun. p. 1. Retrieved January 18, 2021– via Newspapers.com.
  20. 1 2 "NTSB Crews Examine Debris From Tanker Blast; Driver, Truck Had Good Record". Associated Press. December 24, 1988. Retrieved January 16, 2021.
  21. 1 2 Charlier, Tom (December 10, 2006). "Midtown I-40/240 Project Wraps Up; Dangerous curves led to deaths of 8 in 1988". The Commercial Appeal. Memphis. p. B1, B7 . Retrieved November 26, 2021– via Newspapers.com.
  22. ↑ "I-40/240 Midtown Interchange - Project Facts". Tennessee Department of Transportation. 2003. Archived from the original on December 27, 2005. Retrieved January 18, 2020.
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