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NH175 over PEMIGEWASSET RIVER

Map

Coordinates:
+44.02199, -71.68194
44°01'19" N, 71°40'55" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:NH175 over PEMIGEWASSET RIVER
Structure number:028401770014800
Location:0.05 MI FROM JCT RTE 3
Purpose:Carries highway over waterway
Route classification:Minor Collector (Rural) [08]
Length of largest span:171.9 ft. [52.4 m]
Total length:183.1 ft. [55.8 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:30.8 ft. [9.4 m]
Vertical clearance above deck:12.8 ft. [3.9 m]
Owner:State Highway Agency [01]
Year built:1939
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Design load:M 13.5 / H 15 [2]
Main span material:Steel [3]
Main span design:Arch - Thru [12]
Deck type:Open Grating [3]
Wearing surface:Other [9]

Latest Available Inspection: October 2017

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:600 [as of 2013]
Truck traffic:10% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Poor [4 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:37.1
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$3,142,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
October 2017PoorPoorPoorSatisfactory60037.1
November 2016PoorPoorPoorSatisfactory60037.6
December 2015PoorPoorPoorSatisfactory60037.6
November 2014PoorPoorFairGood60046.3
December 2013PoorPoorFairGood35046.7
October 2012FairSatisfactoryFairGood35049.7
November 2011FairSatisfactoryFairGood35049.7
June 2009FairSatisfactoryFairGood40049.6
June 2007FairSatisfactoryFairGood42049.6
October 2003FairSatisfactoryFairGood36049.7
June 2001FairSatisfactoryFairGood36049.7
July 1999FairGoodFairGood36050.7
September 1997FairSatisfactoryFairGood36054.7
April 1995FairSatisfactoryFairGood36053.4
May 1993FairSatisfactoryFairGood20058.6
November 1991FairSatisfactorySatisfactorySatisfactory20068.8