in the flyover video there are 2 wet spots on the spillway..one is in the middle at the new RCC location..DWR said this is form rainwater runoff since there is no drainage system yet in that area...
But why is water seeping out at the top near the gates? The water level is well below the gate level...?
well the wet storm is winding down so far 4 inches fell at the Dam and -66.5 in the higher elevations with snowmelt..more showers today ..then a break and weaker/drier systems later in the week
inflow is now 50,000 and rising... outflow 12,000..lake level 795 feet
DWR has said its projections suggest the main spillway may need to be used sometime next week. They’ve also indicated the rougher surface of the roller-compacted concrete part of the spillway chute could cause turbulence, which could cause damage.
A new surface of structural concrete is scheduled to placed over that part of the spillway this year.http://www.orovillemr.com/article/NB/20180406/NEWS/180409806
now they are saying the spillway won’t be used...
After heavy rains, first use of partly rebuilt Oroville Dam spillway now ‘unlikely’
After a spring storm system dumped 5 to 7 inches of rain into the Feather River basin over the weekend, state officials said Sunday they likely won’t have to use the partly rebuilt flood control spillway at Oroville Dam after all.
Last week, the California Department of Water Resources said the storm might cause water levels in the Lake Oroville reservoir to rise to the “trigger elevation” of 830 feet. At that point, DWR officials planned to open the spillway gates and release water down the 3,000-foot-long concrete chute..
But the lake level only reached 799.7 feet over the weekend, according to DWR.