Dee ihe ndị ọzọ dị na paragraf a - Mgbe a rụzigharịrị ya, e zigara "Sweetbrier" na Cordova, Alaska. Na Febụwarị 1976, mgbe ọ na-aga ọrụ ọhụrụ ya, otu n'ime ndị ọrụ ụgbọ mmiri ya nwụrụ na ọdụ ụgbọ mmiri ụgbọ mmiri na San Diego mgbe ọ dara n'etiti ụgbọ mmiri na ọdụ ụgbọ mmiri. "Sweetbrier" rutere n'ọdụ ụgbọ mmiri ọhụrụ ya na March 1976. N'ebe ahụ, ọ gara n'ihu na-arụzi ihe ndị na-enyere ya aka ịnya ụgbọ mmiri, ma na-enyere ndị na-akụ azụ̀ nọ n'ógbè ahụ aka, ma o nwere echiche ọhụrụ. Cordova dị na nsọtụ ọwụwa anyanwụ nke ụzọ ụgbọ mmiri na-ebu mmanụ si na njedebe nke Trans-Alaskan Pipeline System na Valdez ruo Pacific Ocean. Na January 17, 1980, ụgbọ mmiri "Prince William Sound" nke bu nnukwu mmanụ dị narị puku bọrel asatọ na puku iri atọ na otu, kwụsịrị ịrụ ọrụ ma malite isi n'ụsọ oké osimiri na-aga. Sweetbrier zaghachiri, mana n'ihi na ifufe na-eru 70 knots enweghị ike ịnweta eriri na-adọkpụ ụgbọ mmiri ahụ nwere nkwarụ. Mgbe ụgbọ ahụ kwọpụrụ ruo awa iri na isii, "Prince William Sound" maliteghachiri ịrụ ọrụ ma nwee ike ịga n'ihu n'enweghị nsogbu, ma ka ọ na-erule mgbe ahụ, ọ ka nọ n'ebe dị nanị kilomita isii site n'ikpere mmiri ahụ nkume juru. Na March 24, 1989, nnukwu ụgbọ mmiri ọzọ na-agba n'otu ụzọ ahụ tara ahụhụ ka nke ahụ njọ. "Exxon Valdez"
gbara n'elu Bligh Reef na Prince William Sound na-awụfu 10,800,000 US gallons (41,000 m3) nke mmanụ. "Sweetbrier" bụ akụkụ nke nzaghachi nke ndị nchekwa ụsọ oké osimiri maka nsị ahụ. Ọ rụrụ njikwa ụgbọelu, nchebe ebe a na-azụ azụ salmon, na mmejuputa mpaghara nchekwa gburugburu ụgbọ mmiri na-ebu mmanụ.