the glory hole spillway at monticello dam running again in the spring of 2017 after a season with huge rainfall, lake berryessa,

2017 aerial again america berryessa california chute circle close up construction control dam design detail drop drought engineering fall flood full glory hole increased lake landmark level monticello napa outdoors overspill phenomenon protected rainy reservoir round running season seasonal sinkhole spill spillway spring springtime sunny united states usa valley water west western