Jirgin kasa na Custer Creek ya fashe

 

Jirgin kasa na Custer Creek ya fashe
train wreck (en)
Bayanai
Ƙasa	Tarayyar Amurka
Kwanan wata	19 ga Yuni, 1938
Wuri
46°42′01″N 105°29′10″W

Rushewar jirgin kasa ta Custer Creek (wani lokacin ana kiranta fashewar jirgin ƙasa ta Saugus) ita ce mafi munin bala'in jirgin ƙasa a tarihin Montana. Ya faru ne a ranar 19 ga Yuni, 1938 lokacin da gada, tushe ya wanke ta hanyar ambaliyar ruwa, ya rushe a ƙarƙashin Milwaukee Road's Olympian yayin da ya haye Custer Creek, kusa da Saugus, Montana, kudu maso yammacin Terry, inda ya kashe mutane 49.

Babbar jirgi AA-438

Ginin, lambar AA-438, yana da tsawon mita 180 (55 kuma an gina shi a 1913. Ya kunshi nau'o'i biyu na 50 feet (15 da kuma nau'o-nau'i guda biyar da aka karfafa da ke ɗauke da hanya guda ɗaya a fadin rafin da ke hutawa a kan matakai na kankare. Binciken gadar a farkon wannan shekarar ya kammala cewa gadar tana cikin yanayi mai kyau tare da isasshen rip-rap a wurin don hana tsaftacewa.

Kogin Custer

Custer Creek kanta yawanci yana bushewa na watanni tara na shekara kuma ba a taɓa san shi da tashi zuwa zurfin fiye da ƙafa biyar (1.5 . Amma a daren da ake tambaya girgije ya ajiye kimanin inci 4 zuwa 7 (100 zuwa 180 na ruwan sama a yankin da kogin ya zubar. Jirgin da ya gabata ya haye gadar a karfe 10:15 na yamma a wannan lokacin injiniyan ya kiyasta ruwa ya kasance kusan ƙafa uku ko hudu (0.91 ko 1.22 zurfi. Minti ashirin bayan haka, saboda ruwan sama mai yawa da ya samu, shugaban sashen ya gudanar da bincike kan waƙar kuma ya kiyasta zurfin ruwa ya zama ƙafa shida ko bakwai (1.8 ko 2.1 a ƙarƙashin matakin katako na gadar (watau kusan ƙafa shida (1.8 m) zurfi), ba tare da nuna alamar matsalar da za ta zo ba. 

Dan wasan Olympics

The westbound Olympian that night was hauled by Class S-2 4-8-4 No.220 and comprised eleven cars. It was traveling from Chicago to Tacoma and carrying 155 passengers when it neared Custer Creek at a speed of 50 mph. There was no water on the track to warn the engineer that beneath was a torrent of water 30 feet (9.1 m) high, battering at the bridge foundations, and no brake application was made.

Rushewa

Yayin da Olympian ya haye a karfe 12:35 na safe gadar ta rushe; an jefa injin da motocin fasinjoji bakwai cikin rafin da ya kumbura. A gefen yammacin motar da motoci biyar sun "tubo cikin wani shambles na karfe", inda suka kashe injiniya da mai kashe gobara. Rushewar ta faru da sauri cewa lokacin da aka gano jikin injiniyan har yanzu yana zaune a wurin zama tare da hannunsa a kan bututun. "Sauran motoci biyu sun ƙare a cikin rafin da ke kuka". Ma'aikatan jirgin kasa da fasinjoji marasa rauni sun shirya kokarin ceto; sun fashe windows a kan motocin da ke cikin ruwa don samar da hanyoyin tserewa. Kodayake adadin wadanda suka mutu a hukuma ya kai 47, wannan kimantawa ne yayin da aka kwashe gawawwakin da yawa a cikin Kogin Yellowstone, an gano gawawwakinsa daya a Glendive 50 miles (80 km) a ƙasa. Mutane 75 sun ji rauni. Jaridu sun ba da rahoton rikice-rikice cewa kayan aiki na zamani masu sanyaya iska da ke buƙatar windows masu rufewa, kuma amfani da gilashin fashewa yana da alhakin wasu mutuwar. 

Bincike

Binciken ya tabbatar da cewa girman da saurin ruwan da ke gudana a ƙarƙashin gadar a wannan dare "ya wuce duk abin da aka samu kafin ko kuma ana iya sa ran shi a wannan wuri". Tsarin gadar har yanzu yana da kyau lokacin da jirgin ya isa shi amma biyu daga cikin tsakiya na tsakiya sun lalace. Nauyin locomotive ya sa matakai su ragu kuma gadar ta rushe.