National Limestone Quarries
National Limestone Quarries at Middleburg and Mt Pleasant Mills. 1st Location - Middleburg Quarry Office – 3499 Quarry Rd. Middleburg, PA 17842. ... 3499 Quarry Rd. Middleburg, PA 17842. Printed directions to 2nd location will be handed out at Office, but strongly advise GPS usage as well. Address of 2nd location is (for GPS): 100 …