For those that may have been puzzled by one of the DWR images, the Drain Pipe angles downslope to the outlets in the walls of the Main Spillway. The DWR image gives the impression of an "upslope" angle (optical illusion). The drains are designed such that any water in the drain piping would flow by gravity alone without any hydraulic pressure from spillway operation.
When the Main Spillway is put into use soon, check out any images on the drain outlets in the Spillway walls. If the main source of drain water is from seams and cracks in the concrete, the recent repairs should have sealed these sources. If the drain water flow remains strong, then this may be an indication of alternate flow source(s) getting into the drains.
Optical illusion - drain pipe to outlet looks to connect in an upward angle.
