A good correlation for Overflow is to take the Burrell's Ford Chatt. reading and subtract 1.0 ft to get the Overflow level in feet at the takeout.
4th drop beginning with Singley's Slot, river narrows considerably here -boof over the pyramid rock in center but not right of it - there's a cave back there, thumping cave at high water. Rock may be dry at 1.0 ft or below so boof it a little left. Watch for tree overhead in the exit after landing. At 2.0 ft and above Singley's Slot through Twilight becomes Class 5 as all four drops run together into one large rapid. Here's a shot of the boof off the pyramid rock with drops 2 and 3 of the rapid in the background.
Waterfall
IV+
Waterfall
IV
Hazard
III
Waterfall
III+
Waterfall
IV
Waterfall
IV
Waterfall
IV+
Waterfall
V
Waterfall
V
Waterfall
IV
Rapid
III+
Waterfall
V+
Waterfall
III
Waterfall
V
Waterfall
IV