State workers check on the flow of Oroville Dam’s battered main spillway in mid-March. A preliminary analysis by the U.S. Army Corps of Engineers cites the presence of substandard materials beneath portions of the spillway, problems with the underlying drainage system and other woes as possible causes of the spillway’s fracture.
State workers check on the flow of Oroville Dam’s battered main spillway in mid-March. A preliminary analysis by the U.S. Army Corps of Engineers cites the presence of substandard materials beneath portions of the spillway, problems with the underlying drainage system and other woes as possible causes of the spillway’s fracture. Hector Amezcua hamezcua@sacbee.com
State workers check on the flow of Oroville Dam’s battered main spillway in mid-March. A preliminary analysis by the U.S. Army Corps of Engineers cites the presence of substandard materials beneath portions of the spillway, problems with the underlying drainage system and other woes as possible causes of the spillway’s fracture. Hector Amezcua hamezcua@sacbee.com

What went wrong at Oroville Dam? Analysis points to drainage, problematic soils

April 25, 2017 07:29 PM

UPDATED April 26, 2017 10:07 AM

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