Approximate - nearest available gauge. Use as general reference only.
There are 2 ledges here, Razorback Ledge and Surprise Ledge. Both are technical, but not difficult, rarely retentive. There are also options along the river right side to avoid both ledges in what is commonly referred to as "California" because it's way over there.
Razorback Ledge has 2 lines split by Razorback Rock. Razorback Rock is easily identified as the jagged rock that is visible at low and normal flows, which is easily avoided. The left line runs just river left of the rock and is arguably easier than the right line, the left line will also set you up to run Surprise with little to no adjustment. The right line is roughly 8-10 feet to the right of Razorback rock and this is where the meat of the ledge is. Not a huge drop, but still a drop nonetheless. Running the right line is standard for commercial rafts and most private boaters, this line will need some movement afterwards towards the river left side to make Surprise ledge. Note that you can run either Razorback line and still make way to California to avoid Surprise ledge.
Surprise Ledge has a primary line down the middle of the rapid, this is towards the river left side, but in the center of the channel NOT ALL THE WAY RIVER LEFT. This drop is a bit bigger than Razorback and more consequential with a pinning rock on the river left side of the drop poking straight out downstream. Rafts will often be stuck here if they are off their line to either the left or right.
Rapid
II+
Waterfall
III+
Hazard
III-
Hazard
N/A