This is from multiple hunts a week and a half ago on a Thur, Fri and Sat.
I was fortunate to rescue the two 1876-S seated dimes about twenty feet apart with an IH in between. That was on a Friday morning, by the end of the day that area was under six inches of gravel.
Wow. Around here they're ALWAYS tearing out some curb or sidewalk, but I've never seen such a long section. They'll tear out the curb or a few sidewalk squares at a time and have it all filled with gravel by the end of the day. If they don't then they cover it in tarps and plastic and wrap the whole thing with caution tape. Drool.