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NH 1A over HAMPTON RIVER

Map

Coordinates:
+42.89641, -70.81639
42°53'47" N, 70°48'59" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:NH 1A over HAMPTON RIVER
Structure number:011102350002500
Location:0.1 MI FROM SEABROOK TL
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Minor Arterial (Urban) [16]
Length of largest span:94.2 ft. [28.7 m]
Total length:1199.2 ft. [365.5 m]
Roadway width between curbs:25.9 ft. [7.9 m]
Deck width edge-to-edge:33.5 ft. [10.2 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Owner:State Highway Agency [01]
Year built:1949
Year reconstructed:1984
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:Movable - Bascule [16]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Epoxy Overlay [5]

Latest Available Inspection: November 2018

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:9,466 [as of 2017]
Truck traffic:7% of total traffic
Deck condition:Very Good [8 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 corrrective action [3]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
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]
Pier/abutment protection:In place but re-evaluation of design suggested [4]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:26.3
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
November 2018PoorVery GoodPoorSatisfactory946626.3
November 2017PoorVery GoodPoorSatisfactory895930.3
November 2016PoorVery GoodPoorSatisfactory895930.3
November 2015PoorVery GoodPoorSatisfactory882030.3
November 2014PoorVery GoodPoorSatisfactory857430.3
November 2013PoorVery GoodPoorSatisfactory859430.3
November 2012PoorVery GoodPoorSatisfactory848530.3
November 2011PoorExcellentPoorSatisfactory821130.3
November 2010PoorExcellentPoorSatisfactory923930.3
November 2009PoorPoorPoorSatisfactory923923.3
November 2008PoorPoorPoorSatisfactory923923.3
August 2007PoorPoorPoorSatisfactory890023.3
March 2007PoorPoorPoorSatisfactory890023.3
November 2005PoorPoorPoorSatisfactory1170523.3
October 2004PoorPoorPoorSatisfactory1170510.4
March 2003PoorPoorPoorSatisfactory1175023.3
September 2002PoorPoorPoorSatisfactory1170523.3
September 2001PoorPoorPoorSatisfactory1175023.3
September 2000PoorPoorFairGood1175039.3
September 1999PoorPoorFairGood1175039.3
May 1997FairFairSatisfactoryGood1175044.3
June 1995FairFairSatisfactorySatisfactory1174644.0
December 1993FairSatisfactorySatisfactorySatisfactory1174645.0
May 1991FairSatisfactorySatisfactorySatisfactory981947.9