yep.
I have worked around gravel pits my whole life, and have found some gold.
The glacially deposited gold is usually very fine, and flat. It can be found concentrated in black seems in the high-walls, but not very often in my experience.
Study the plant, and you will soon figure out where the heavies collect.
If it's a wash plant, with sand screws, in the bottom of the screw tanks is where you will find most of it. Even around the tank drains there will be black sand and gold, with out the chore of cleaning out the screw.
I used to hook a home made sluice right to the drain, take a fire hose and wash the bottom 2 feet or so of sand through the box.
the trouble with this is not being able to regulate the feed, and booming the box. We have installed larger screws at work, and the new drains are too low, so it's harder to get.
Any where you see black sand collecting, there is probably some gold.
Here's some Ohio Gravel pit Gold.