3offTheTee
Tour Rookie
Along the above the green keepers had dropped a large amount of sand on the fairway, NOT green. Obviously in error. Never seen that amount of sand before.Materials piled for removal are GUR by definition, no marking required. How you know is another matter but you could, for example know that grass cuttings are always removed on the particular course, or reasonably assume that a sawn up and neat pile of fallen timber was going to be picked up, or that a heap of sand near a green was going to be lifted and spread. A reasonable deduction from what you see, in other words.
Take it you can take relief.