What's on that road is called "chipseal", it isn't really gravel. It's loose immediately after they apply it but it quickly (over a few weeks) beds down and is then as grippy as sandpaper. Appleby was a mess right after they did it, but it is well on the way. You can ride on it, just stay in the car tire tracks and don't try any knee-dragging shenanigans around the corner up the hill next to Kelso ski area. Watch out at intersections, those are often the last areas for the loose stuff to either scatter or bed down.
Steeles is no help; they did that road also.
I don't think they chipsealed 14th SR, but that road tends to have sand in some spots at the best of times.
The pavement up Appleby around the hairpin has not been touched.
You might as well come straight down Appleby from 5th SR, it isn't that bad.
I've been trying to help out by driving my car with the wheels between the usual tire tracks, on the loose stuff, to help it either bed down or scatter ...