Rating:
1 vote

LVRC - Cambridge Junction Bridge

Photos 

LVRC - Cambridge Junction Bridge

Southern approach

Photo taken by Michael Quiet in June 2016

Enlarge

BH Photo #355442

Map 

Description 

This is a bit of a Frankenstein bridge, as it has quite a few different components from different eras. As with other composite bridges like this on this line this bridge dates to 1968, the year the St J & LC embarked on a desperate attempt to increase the line's productivity by removing the remaining covered bridges still in service on the line with steel spans. Most of these upgrades were accomplished by replacing them with used girder spans.

The previous bridge here was a covered bridge built in 1899. Supported by ashlar abutments and a river pier, it also had a DPG and stringer approach spans to the south

In April of 2016 it was found that the shoddy timber pile pier in the river had rotted and was beginning to shift, putting the spans in jeopardy of collapse. An emergency project was undertaken with assistance form the State to pull the 2 spans at risk from the river. From there the pier would be rebuilt and the spans will be put back in place.

Facts 

Overview
Deck plate girder bridge over Lamoille River on Lamoille Valley Railroad
Location
Cambridge Junction, Lamoille County, Vermont
Status
Superstructure removed
History
Original bridge built 1899; Covered span replaced with 2 recycled DPG spans 1968; demolished 2017
Railroads
- Lamoille Valley Railroad (LVRC)
- St. Johnsbury & Lamoille County Railroad (StJ&LC)
Design
From south the north:
2 steel stringer spans supported by timber piles (Installed prior to 1968)
1 DPG span supported by timber pile and ashlar pier (1899)
2 DPG spans of different sizes supported by ashlar abutment/pier as well as timber pile (installed 1968)
Dimensions
Length of largest span: 84.0 ft.
Total length: 230.0 ft.
Also called
LVRC - Bridge No. 68
Approximate latitude, longitude
+44.65177, -72.81956   (decimal degrees)
44°39'06" N, 72°49'10" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/672889/4946579 (zone/easting/northing)
Inventory number
BH 72495 (Bridgehunter.com ID)

Update Log 

  • August 13, 2017: Updated by Michael Quiet: Noted that spans have been removed. Replacement in progress
  • March 8, 2017: New photos from Michael Quiet
  • June 21, 2016: Added by Michael Quiet

Related Bridges 

Sources 

Comments 

LVRC - Cambridge Junction Bridge
Posted April 11, 2017, by george oakley (georgeoakley49 [at] yahoo [dot] com)

Michael,do you know why they would cover over the rail and not remove it?Sounds weird to me.Maybe you or anybody else can find out.

LVRC - Cambridge Junction Bridge
Posted April 11, 2017, by Michael Quiet (mquiet [at] gmail [dot] com)

Well looks like my optimism was misplaced. The existing components are going to be replaced with 2 125 foot modern spans. A silver lining is that the original ashlar pier and abutments will be retained and refurbished.

http://www.lvrt.org/bridge-68-to-be-replaced-this-summer

I'm pretty conflicted, as this bridge was quite a mish-mash of components from different times that made it pretty unique, but of questionable historic integrity/value. Its added timber pile piers contributed both to its initial failure, and were going to be a problem in the future. Returning it to a straight 2 span system will prevent future problems and undoubtedly keep down maintenance costs. But on the other hand it was a exceptional demonstration of the desperate times for the STJ & LC with its cobbled-together appearance giving it an incredible amount of character. Maybe it was a bridge only a pontist could love

LVRC - Cambridge Junction Bridge
Posted March 13, 2017, by Michael Quiet (mquiet [at] gmail [dot] com)

Bidding has been put out for the construction of this bridge. It'll be nice to see this one put back together!

http://www.bridgeconstruction.biz/bid_opportunities/2017/01/...