Coolest arch I've ever seen. Hands down. Sometimes I come across things that I just don't know how to fit in the frame and still make it look clean because they're just so big. Jacob Hamblin arch was one of those things.
Indeed, I've been through ~30 or so miles of the Gulch. Saw this, Steven's Arch, Teacup Arch (as I believe it's called), and the formations of several developing slot canyons. Unfortunately, I went with a group of people that just seemed to want to get through it as quickly as possible. I felt rushed and annoyed the whole time I was going through. I'll probably return sometime next year. . . if I have the time.
26, I think. We started at the Redwell trailhead, then went down to the confluence, and exited at Redwell. We camped both nights on the backside of this arch. I recommend Redwell over Hurricane Wash if you ever make it up there.