+42.84454, -71.73886
42°50'40" N, 71°44'20" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:NH 31 over STONY BROOK
Structure number:027701320012700
Location:0.4 MI FROM JCT RTE 101
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Minor Arterial (Urban) [16]
Length of largest span:49.9 ft. [15.2 m]
Total length:57.1 ft. [17.4 m]
Roadway width between curbs:23.0 ft. [7.0 m]
Deck width edge-to-edge:29.5 ft. [9.0 m]
Owner:State Highway Agency [01]
Year built:1905
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Main span material:Masonry [8]
Main span design:Arch - Deck [11]
Deck type:Not applicable [N]
Wearing surface:Bituminous [6]

Latest Available Inspection: April 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:3,084 [as of 2017]
Truck traffic:4% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Meets minimum tolerable limits to be left in place as is [4]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:59.2
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
April 2018FairGoodGoodSatisfactory308459.2
April 2016FairGoodGoodSatisfactory330059.1
April 2014FairGoodGoodSatisfactory330059.1
April 2012FairGoodGoodSatisfactory40005.0
April 2010FairGoodGoodSatisfactory41005.0
July 2008FairGoodGoodSatisfactory41005.0
May 2006FairGoodGoodSatisfactory46005.0
May 2004FairGoodGoodSatisfactory46005.0
March 2002FairGoodGoodSatisfactory46005.0
April 2000FairGoodGoodSatisfactory46005.0
July 1998FairVery GoodVery GoodSatisfactory46005.0
June 1996FairVery GoodVery GoodSatisfactory46005.0
May 1994FairVery GoodVery GoodSatisfactory39005.1
June 1992FairVery GoodVery GoodSatisfactory200012.3
May 1990GoodVery GoodVery GoodGood200012.3