The silt isn't really that thick, maybe 1/2 inch or less in most places, it's just left over from when the road and greenway were flooded. The worst is when it's over the concrete; it fills in the little tiny pores (is that what you call them?) and gets really slick. Thankfully the portion with concrete is very small, and most of the way that gets flooded is asphalt.

I looked at the Conti travel contacts. I was thinking that the smooth center band might screw me in this situation, because they won't really be able to sink into the dirt to catch the knobs on the edges.