National Geographic : 1990 Jan
I'* :.^.ifc-; 1 .^ GColua Gla A fourth of the nation's domestic oil, as much as t 2.1 million barrels a day, flows through the trans Alaska pipeline from Prudhoe Bav to Valdez. I; Oiled shoreline-._ . _-- Sea otter Unaffected concentration shoreline Wild bird Rocky shoreline concentration Marsh or -- 1 erring spawning tidal flat \ area Salmon terminal Sand and/or and harvest area gravel beach gre Salmon hatchery NGSCARTOGRAPHICDIVISIONDESIGN:ALLENCARROLL;RESEARCH:LINDAR. KRIETE PRODUCTION:VICKIMcANALLEN-PRATT; MAPEDITORS:GUSPLATIS,JOHNT. BLOZIS PAINTEDBYSUSANSANFORD,MEDSCIARTCO Leaving the outbound shipping lane, the Exxon Valdez crossed over the ; inbound lane to avoid ice G ufpf bergs calved from Colum SAlaska bia Glacier. She failed to resume a normal course and struck Bligh Reef. 147°w including Katmai National Park and Preserve. More than 1,200 miles of shoreline were oiled (key). Had the spill occurred on the eastern seaboard, it would have stretched from Cape Cod to North Carolina's Outer Banks (right). The U. S. Coast Guard tracked the oil aeri ally with technology such as side-looking airborne radar (SLAR), which detects oil smoothed waters amid normal wave patterns. Alaska's Big Spill f 4 JJ, '"