Oroville Dam Emergency Spillway Repairs Starting

via Roy Spencer, PhD.http://ift.tt/1o1jAbd

With daylight and Oroville Lake water levels now 4 feet below the lip of the emergency spillway, we can see that the area of concern is a gouge which developed near the far end of the concrete weir, and was eroding uphill toward that structure; for scale, those yellow spots are people inspecting the gouge (click images for full-size):

A wide-angle view (KCRA-TV helicopter frame grabs) shows the main, heavily damaged spillway which still has a huge 100,000 CFS flow continuing in an attempt to reduce the lake level as much as possible:

Rocks have been bagged overnight and helicopters will soon start filling the gouge:

via Roy Spencer, PhD. http://ift.tt/1o1jAbd

February 13, 2017 at 02:44AM