There are 3 mines on Manhattan; is that correct?

	▲	leeter 9 hours ago \| parent \| next [-]
		Based on the info if you click into them, likely no. I would have expected them to be incidental materials from tunneling, but reading the description that's not the case.
	▲	greggsy 7 hours ago \| parent \| prev [-]
		Quarries?