From March 5 news article on dam
“As the lake surpasses elevation 813 feet (the elevation of the spillway gates), it’s anticipated that some water will seep through the gates onto the spillway as the gates are not designed to be water tight.

The flood operations plan calls for a target elevation of 835.5 feet through the end of February and as low as 848 feet by the end of March. DWR will allow the lake to continue rising past 848 feet through the late spring and summer months to build up water supply storage and offer recreational opportunities........”