5 votes

Overseas Highway - Seven Mile Bridge


General Elevation View, Facing East

Photo taken by Historic American Engineering Record

View photos at Library of Congress

BH Photo #129209

Street View 


Driving the Seven Mile Bridge

Recorded in 2012, this video features multiple views of my driving this bridge. I used 3 SD cameras here (one Black & White) and 3 DVD "set top" video recorders to capture the video. The video here features all 3 cameras in 1080P to keep the images from being too small.

Mark W. Shannon


Concrete Arch and Deck Girder bridge over Moser Channel on Old US 1 with a through truss swing span (removed), now used as a Fishing Pier and observation deck in Marathon
Marathon, Monroe County, Florida
Originally built by the railroad in 1912. Replaced and swing span removed 1982; Part of the bridge now used for fishing.
- American Bridge Co. of New York (Fabricator)
- Terry & Tench Construction Co. of New York City, New York (Erection)
- William Krome (Designer/FEC Chief Engineer)
- Florida East Coast Railway (FEC)
Warren through truss swing span
Closed spandrel arch
Deck plate girder
Posted to the National Register of Historic Places on August 3, 1979
Also called
Knight's Key Bridge
Piegon Key Bridge
FEC - Moser Channel Bridge
FEC - Seven Mile Bridge
FEC - Piegon Key Bridge
FEC - Pacet Channel Bridge
Moser Channel Bridge
Pacet Channel Bridge
FEC - Knight's Key Bridge
Approximate latitude, longitude
+24.68960, -81.20495   (decimal degrees)
24°41'23" N, 81°12'18" W   (degrees°minutes'seconds")
Approximate UTM coordinates
17/479266/2730594 (zone/easting/northing)
Quadrangle map:
Sevenmile Bridge
Inventory numbers
NRHP 79000684 (National Register of Historic Places reference number)
BH 38300 (Bridgehunter.com ID)

Update Log 

  • July 6, 2020: New photos from Michael Miller
  • November 13, 2018: New photo from Douglas Butler
  • November 12, 2018: New photo from Douglas Butler
  • April 11, 2017: Updated by Luke: Added builders
  • June 26, 2016: New video from Mark Shannon
  • June 21, 2016: New video from Mark Shannon
  • April 20, 2016: Updated by Luke: Added category "Converted to an artificial reef"
  • August 22, 2013: New photo from Douglas Butler
  • March 4, 2011: Updated by James McCray: updated NRHP info, and changed status to open to pedestrians
  • March 13, 2010: Updated by Kim Harvey: street view
  • July 4, 2009: Updated by Kim Harvey: added category: rail to road
  • December 5, 2008: Added by Kim Harvey



Overseas Highway - Seven Mile Bridge
Posted December 13, 2021, by Hayward McKee (keywsun [at] gmail [dot] com)

No that part of the old bridge is completely in accessable beyond Pigeon Key... to just a 100 yard or so off the other end.