June 2023

• 1
  
  Alexandria Aqueduct
  Discovery at Mile 1.0
• 2
  
  Great Falls Overlook
  Mile 14.4
• 3
  
  Washington Aqueduct
  Mile 14.4
• 4
  
  Seneca Stone Cutting Mill
  Discovery at Mile 22.8
• 5
  
  Lock 24 “Rileys” & Seneca Aqueduct
  Discovery at Mile 22.8
• 6
  
  Monocacy Aqueduct
  Discovery at Mile 42.2
• 7
  
  Point of Rocks
  Town/Location at Mile 48.2
• 8
  
  Point of Rocks Train Tunnel
  Mile 50.0
• 9
  
  Point of Rocks Train Station
  
• 10
  
  Catoctin Aqueduct
  Discovery at Mile 51.5
• 11
  
  Harpers Ferry & Bolivar
  Town/Location
• 12
  
  Shepherdstown
  Town/Location
• 13
  
  Antietam Creek and Aqueduct
  Mile 69.4
• 14
  
  Dam 4
  Discovery at Mile 84.6
• 15
  
  Cushwa Basin
  Discovery at Mile 99.6
• 16
  
  Conococheague Aqueduct
  Discovery at Mile 99.6
• 17
  
  Williamsport
  Town/Location
• 18
  
  Dam 5/Guard Lock
  Discovery at Mile 106.6
• 19
  
  Licking Creek Aqueduct
  Mile 116.1
• 20
  
  Tonoloway Aqueduct
  Mile 123.0