Inside the desperate battle to shore up the eroded hillside next to Lake Oroville

Armed with rocks and concrete, officials have been battling to fortify an earthen hillside next to Lake Oroville that has eroded — a critical task in case the reservoir overflows again.

A quarry is being worked around the clock to produce boulders that are being used in a desperate attempt to plug unexpected holes caused by erosion from water overflowing from the lake.