Oh yeah, I know now. I helped wheelbarrow that stuff last year - it was the same day as the LewMo MTBNJ bike fest. We also dug water runnoffs on the climb just after the bridge, and built the berm just up from that.
We temporarily put the wooden sections off to the side to dry but I'm sure they're gone now as that was 8,9,10 months ago...
The gravel is hard-packed so it doesn't slow you down and, in fact, it's starting to form a tiny berm so if you're coming in anti-clockwise then if is likely faster than the wooden sections were.
I should be there tomorrow evening for a sprint.