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U.S. Route 4 Bridge

Grafton County, New Hampshire

Photos 

Photo taken by Historic American Engineering Record

View photos at Library of Congress

BH Photo #160947

Map 

Facts 

Overview
Lost Pratt through truss bridge over Mascoma River on U.S. 4
Location
Grafton County, New Hampshire
Status
Replaced by new bridge
History
Built 1940; replaced 1993
Builders
- John W. Childs (Engineer)
- R.G. Watkins & Son of Amesbury, Massachusetts (Contractor)
Design
Riveted, 7-panel Pratt through truss
Dimensions
Length of largest span: 150.9 ft.
Total length: 164.1 ft.
Deck width: 25.9 ft.
Vertical clearance above deck: 13.5 ft.
Recognition
Eligible for the National Register of Historic Places
Also called
US4 Mascoma River Bridge
Approximate latitude, longitude
+43.64372, -72.11300   (decimal degrees)
43°38'37" N, 72°06'47" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/732847/4836353 (zone/easting/northing)
Quadrangle map:
Canaan
Inventory number
BH 44770 (Bridgehunter.com ID)

Categories 

7-panel truss (362)
Built 1940 (1,023)
Built during 1940s (3,899)
Grafton County, New Hampshire (142)
HAER documented (1,103)
John W. Childs (2)
Lost (22,262)
Lost 1993 (448)
Lost during 1990s (3,846)
NR-eligible (4,016)
New Hampshire (592)
Owned by state (15,127)
 Pratt through truss (5,008)
Pratt truss (8,743)
R.G. Watkins & Son (1)
Replaced by new bridge (14,852)
Span length 125-175 feet (3,997)
Structurally deficient (15,851)
Sufficiency rating zero (263)
Through truss (14,044)
Total length 125-175 feet (5,673)
Truss (31,232)
US 4 (11)

Update Log 

  • June 28, 2015: Updated by Royce and Bobette Haley: changed coordinates per Dom Morrison
  • April 4, 2010: Added by Robert Stephenson

Sources 

  • Robert Stephenson - seinfeld99 [at] yahoo [dot] com
  • HAER NH-19 - U.S. Route 4 Bridge, Spanning Mascoma River
  • Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com
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Comments 

U.S. Route 4 Bridge
Posted June 30, 2015, by Don Morrison

Wow!

Royce;

Thanks for the message agreeing with my opinion on this location. I don't remember adding the comment, but at least we finally got the location correct.

Did you arrive at this bridge via the to-do list? I sometimes look for bridges on the list and may have been doing some to-dos when I wrote that message.

Sometimes you find something really interesting on the to-do list. Here is one I was looking to correct (the location information of) two years ago. 8^)

http://bridgehunter.com/ia/fayette/quinn-creek/

U.S. Route 4 Bridge
Posted June 28, 2015, by Royce and Bobette Haley (roycehaley111 [at] yahoo [dot] com)

Hey Don

Just saw this from last year-U.S. Route 4 Bridge

Posted March 23, 2014, by Don Morrison

Does anyone agree that this bridge was probably located at 43.643513,-72.112888 instead of where it's presently shown?

Some of the HAER photos were obviously taken from a nearby bridge, and these coordinates are where Rte. 4 crosses the Mascoma in close proximity to one of the many rail to trail bridges in this area.

You are correct with those Coordinates-Royce

U.S. Route 4 Bridge
Posted March 23, 2014, by Don Morrison

Does anyone agree that this bridge was probably located at 43.643513,-72.112888 instead of where it's presently shown?

Some of the HAER photos were obviously taken from a nearby bridge, and these coordinates are where Rte. 4 crosses the Mascoma in close proximity to one of the many rail to trail bridges in this area.

U.S. Route 4 Bridge
Posted March 23, 2014, by ArtS (asuckewer [at] knite [dot] com)

Found this, interesting but rather unfriendly terms. Also odd that it came up in a search of recent updates considering the bridge has been gone so long:

http://www.nh.gov/dot/org/projectdevelopment/bridgedesign/do...