Dam 4 (El Cuatro)

This dam is generally run left of center, and at low flows, the line is easy and unconsequential.  At high flows (thousands of cfs), the river right side of the dam forms a large ledge hole (grabby at some levels), but following the green water at river left lines you up for a trashy wave-hole (Trashcan Hole) located 60' downstream of the dam.  Trashcan Hole becomes a world-class rodeo hole at around 3000-4000 cfs but earns its name at higher flows than that.  At higher releases (generally 4500-5500 cfs), the dam itself forms a beautiful surf wave ("The Niño") left of center, and above 5000 cfs, The Niño has eddy service and is river-wide.  This wave is fast and forgiving.  You can zone out in a front surf for days on it or easily do spins, and it gives up airscrews and such to more experienced playboaters.  Below about 4500 cfs, The Niño becomes less retentive and more difficult to catch, and the wave compresses at river right into more of a wave-hole.  There is no public access here for park 'n' play.

The following videos are, respectively, from 2015 of some local kayakers playing in The Niño at 5500 cfs and from 2007 of some local kayakers playing in Trashcan Hole (note that the level shown in the 2007 video was actually about 4000 cfs, not 5000.)