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How to tell an invasive swamp rodent from other California critters 1:07

How to tell an invasive swamp rodent from other California critters

This is what Oroville Dam spillway looks like mid-February 2018 1:57

This is what Oroville Dam spillway looks like mid-February 2018

Why California officials fear this lapdog-sized swamp rodent 1:53

Why California officials fear this lapdog-sized swamp rodent

Watch drought conditions spread across California 0:47

Watch drought conditions spread across California

There’s not much snow in the Sierra. See how it compares to February in recent years 0:42

There’s not much snow in the Sierra. See how it compares to February in recent years

Marking one year since Oroville evacuations 1:01

Marking one year since Oroville evacuations

Watch the flood that could have happened if the Oroville spillway failed 0:37

Watch the flood that could have happened if the Oroville spillway failed

Fly over the proposed site for Sites Reservoir in Northern California 0:53

Fly over the proposed site for Sites Reservoir in Northern California

Sierra snowpack stays below average despite gains 1:30

Sierra snowpack stays below average despite gains

Get closeup view of latest work at Oroville Dam spillway 1:37

Get closeup view of latest work at Oroville Dam spillway

Water levels dropped Monday at California's Lake Oroville, stopping water from spilling over a massive dam's potentially hazardous emergency spillway after authorities ordered the evacuation of nearly 200,000 people from towns lying below the lake. KGO via AP
Water levels dropped Monday at California's Lake Oroville, stopping water from spilling over a massive dam's potentially hazardous emergency spillway after authorities ordered the evacuation of nearly 200,000 people from towns lying below the lake. KGO via AP

Engineers have known for decades that Oroville’s backup spillway was unreliable

February 13, 2017 04:32 PM

More Videos

How to tell an invasive swamp rodent from other California critters 1:07

How to tell an invasive swamp rodent from other California critters

This is what Oroville Dam spillway looks like mid-February 2018 1:57

This is what Oroville Dam spillway looks like mid-February 2018

Why California officials fear this lapdog-sized swamp rodent 1:53

Why California officials fear this lapdog-sized swamp rodent

Watch drought conditions spread across California 0:47

Watch drought conditions spread across California

There’s not much snow in the Sierra. See how it compares to February in recent years 0:42

There’s not much snow in the Sierra. See how it compares to February in recent years

Marking one year since Oroville evacuations 1:01

Marking one year since Oroville evacuations

Watch the flood that could have happened if the Oroville spillway failed 0:37

Watch the flood that could have happened if the Oroville spillway failed

Fly over the proposed site for Sites Reservoir in Northern California 0:53

Fly over the proposed site for Sites Reservoir in Northern California

Sierra snowpack stays below average despite gains 1:30

Sierra snowpack stays below average despite gains

Get closeup view of latest work at Oroville Dam spillway 1:37

Get closeup view of latest work at Oroville Dam spillway