If you're planning a project that requires gravel, you might be wondering whether large or small is best. And this decision ...

The small, cube-shaped pieces of gravel are then immediately embedded in the liquid asphalt. Often they are applied at a rate of 40 to 50 pounds per square yard.

And Mr. Epping is dabbling, adding sandy pockets here and there to allow volunteers — “fooling around a little,” as he put it, “with some small experiments.” Gravel makes for a different ...