First two are city water impoundments.  The rest are larger stock ponds.  None are 700 feet tall holding back more water than all the dams in the Willamette River basin,  as is Oroville Dam.  

There are very old photos of pre dam Sacramento Valley floods that were 40 miles or more across,  from the east side of the Coast Range to the foothills of the Sierras.  Wide enough you couldn't see  the bank on the other side across the water, just mountains in the background.  

Unintended consequences of Big Dreams and agricultural riches,   swimming pool water for SoCal.  Beware of what you wish for.  It would be ten million people or more  uprooted if that dam were to collapse.  Some from the deluge and many more in SoCal due to no access to potable water,  toilet flushing,  livestock water,  and all the  rest.