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MNCW - Mianus River Bridge


Amtrak - Mianus River Bridge


Photo taken by Douglas Butler in June 2014

License: Creative Commons Attribution (CC BY)


BH Photo #286079


Street View 


The original bridge was a two-track, deck truss structure of seven fixed spans andone-center pier movable span with two deck plate girder approach spans on the west end. The trusses on the west end were in good condition and were not restored at that time. The piers were widened on both sides by building on to the existing masonry, and the two additional trusses needed for four tracks were erected on the outside of the present trusses. On the east end, however, the old trusses were taken down and new piers were built for three spans identical with those on the east end. AS copied from "NATIONAL REGISTER OF HISTORIC PLACES INVENTORY - NOMINATION FORM"


Deck girder bridge over Mianus River on Metro-North New Haven Line/Amtrak NEC
Greenwich, Fairfield County, Connecticut
Open to traffic
Built 1904, rehabilitated 1989
- American Bridge Co. of New York
- Berlin Iron Bridge Co. of East Berlin, Connecticut (Original Bridge)
- C. M. Ingersoll (Chief Engineer)
- Daly & Holbrook (Contactor)
- Scherzer Rolling Lift Bridge Co. of Chicago, Illinois
- W. H. Moore ( Engineers of Bridges)
- Amtrak (AMTK)
- Commuter Rail
- Metro-North Commuter Railroad (MNCW)
- New York City Metropolitan Transit Authority (MTA)
- New York, New Haven & Hartford Railroad (NH)
- Northeast Corridor (NEC)
- Penn Central Railroad (PC)
Deck girder bascule with double-intersection Warren deck truss approaches
Length of largest span: 122.0 ft.
Total length: 1,089.0 ft.
Posted to the National Register of Historic Places on June 12, 1987
Also called
Cos Cob Bridge
Approximate latitude, longitude
+41.03072, -73.59390   (decimal degrees)
41°01'51" N, 73°35'38" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/618202/4543119 (zone/easting/northing)
Quadrangle map:
Inventory numbers
CT 08008R (Connecticut bridge number)
NRHP 87000845 (National Register of Historic Places reference number)
BH 61478 (Bridgehunter.com ID)

Update Log 

  • November 3, 2021: New photo from Geoff Hubbs
  • August 10, 2021: New photos from Patrick Gurwell
  • November 7, 2020: New photos from Gregory Grice
  • May 11, 2020: New photo from Geoff Hubbs
  • December 7, 2016: New photo from Royce and Bobette Haley
  • October 28, 2015: New photo from Douglas Butler
  • October 10, 2014: Photo imported by Dave King
  • September 29, 2014: Updated by Royce and Bobette Haley: Added Original bridge at site-added contactor and builder for original and current bridge
  • July 24, 2014: Updated by Ian Martin: Added information on approach spans, changed owner to Metro-North
  • July 7, 2014: New Street View added by Ralph Demars
  • June 22, 2014: Added by Douglas Butler


  • Douglas Butler
  • Ian Martin
  • ConnDOT
  • Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com
  • HAER CT-11 - Northeast Railroad Corridor, Amtrak Route between New York/Connecticut & Connecticut/Rhode Island State Lines, New Haven, New Haven County, CT
  • Geoff Hubbs
  • Gregory Grice - bl20gh114 [at] gmail [dot] com
  • Patrick Gurwell - pgurwell [at] gmail [dot] com