[EarthResearcher333]

>>Important Correction: Width of Main Spillway is 178.7ft <<

The 33’ x 17’-7” construction blueprints are height and width of each “gate” instead of width and height. (note: blueprints do not specify - ordering has to be extracted from image orientation).

The 8 gates provide 140.7 feet of open waterflow width into the main spillway. There are 7 concrete-piers that separate each bay with a “double width” concrete pier in the center. With each concrete pier stated as 5 ft thick, this comes to 40 ft. However, I believe the center “double width” concrete pier is slightly less than a full 2x thickness.

This width correction stemmed from looking at the string of maintenance vehicle sizes relative to the spillway. Couldn’t get enough truck lengths to get to the inverted length width numbers.

[EarthResearcher333]

Clip from Oroville dam specifications, "Pertinent Data", "General".

re: dimensions of main spillway.

[Repeal The 17th]

The picture below is 'click-able' and then it is also 'zoom-able'.

The 'floor' of the main spillway is at elevation 813...
The chutes are 33 feet tall...
The lake level is now at elevation 842...
So the water level is now down just below the top of the chutes.
(the emergency spillway visible on the far right is at elevation 900)
This picture was taken in August of 2016, just 6 months ago...