Table:
text: Blue Ridge Parkway tunnels
Tunnels
Tunnels
Milepost Name_of_the_tunnel Length_ Maximum_Height Minimum_Height
53.1 Bluff Mountain Tunnel feet (m) feet 1inch (m) feet 7inches (m)
333.4 Little Switzerland Tunnel feet (m) feet 8inches (m) feet 4inches (m)
336.4 Wild Acres Tunnel feet (m) feet 10inches (m) feet 1inch (m)
344.6 Twin Tunnel #1 North feet (m) feet (m) feet (m)
344.7 Twin Tunnel #2 South feet (m) feet 7inches (m) feet 7inches (m)
349.0 Rough Ridge Tunnel feet (m) feet 6inches (m) feet 9inches (m)
364.4 Craggy Pinnacle Tunnel feet (m) feet 9inches (m) feet 1inch (m)
365.6 Craggy Flats Tunnel feet (m) feet 5inches (m) feet 1inch (m)

Question: What is the minimum height of the Little Switzerland Tunnel on the Blue Ridge Parkway?

Question: What is the Twin Tunnel #1 North Milepost on the Blue Ridge Parkway?