1 vote

Air Line State Park Trail - Middle Haddam Road Stone Arch


CT 45S 1

South face consisting of granite blocks.

Photo taken by Chester Gehman in February 2014


BH Photo #468340

Street View 


New Haven Railroad Bridge Number 437, a stone arch bridge over Middle Haddam Road at milepost 28.18 of the former Air Line. The newer segment of road that is now CT Routes 17 and 66 replaced this segment of Middle Haddam Road of being a major route. An interesting feature of this bridge is that while the faces, southern wingwalls, and inside of the arch are constructed in granite, the northern wingwalls are built in brownstone. It is unknown if this is original or the result of a later modification.

Opened for use as park of the Air Line State Park Trail Portland section in 2018


Abandoned stone arch bridge over Middle Haddam Road on NYNH&H Air Line (abandoned)
Cobalt, Middlesex County, Connecticut
Open to pedestrians and bikes
Built 1873, abandoned 1965
- Boston & New York Air-Line Railroad (B&NY)
- New Haven, Middletown & Willimantic Railroad (NHM&W)
- New York, New Haven & Hartford Railroad (NH)
Stone arch
Also called
NH - Middle Haddam Road Stone Arch
NH - Bridge No. 437
Approximate latitude, longitude
+41.56454, -72.57790   (decimal degrees)
41°33'52" N, 72°34'40" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/701961/4604262 (zone/easting/northing)
Quadrangle map:
Middle Haddam
Inventory number
BH 61892 (Bridgehunter.com ID)

Update Log 

  • March 21, 2020: New photos from Chester Gehman
  • December 21, 2018: Updated by Ian Martin: Updated to reflect trail use
  • April 26, 2015: Updated by Ian Martin: Added build year & note about different stone types
  • April 11, 2015: Updated by Erich Pfistner: Added a description.
  • July 24, 2014: New Street View added by Ian Martin


  • Ian Martin
  • Flickr
  • Chester Gehman - gehmanc2000 [at] yahoo [dot] com