Share:

HWY BRIDGE ST over WATER MERRIMACK RIVER

Map

Coordinates:
+42.64817, -71.30515
42°38'53" N, 71°18'19" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:HWY BRIDGE ST over WATER MERRIMACK RIVER
Structure number:L150192FTDOTNBI
Old structure number:2FT059426024100 (from 1992 edition)
Location:0.25 MI W FALLS & RT 110
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:196.9 ft. [60.0 m]
Total length:474.1 ft. [144.5 m]
Roadway width between curbs:40.0 ft. [12.2 m]
Deck width edge-to-edge:70.5 ft. [21.5 m]
Vertical clearance above deck:14.4 ft. [4.4 m]
Owner:State Highway Agency [01]
Year built:1937
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Design load:M 18 / H 20 [4]
Number of main spans:3
Main spans material:Steel continuous [4]
Main spans design:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: May 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:15,200 [as of 2014]
Truck traffic:6% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 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: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]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:58.8
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$15,766,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2018FairFairFairFair1520058.8
May 2016FairFairFairFair1520058.8
May 2014FairFairFairFair1520058.8
May 2012PoorFairFairPoor3120046.5
May 2010FairFairFairFair2650057.1
May 2008FairFairFairFair2650057.1
January 2000FairFairFairSatisfactory2164060.8
January 1998FairFairFairSatisfactory2496060.3
December 1996FairFairFairSatisfactory3373059.0
February 1992FairSatisfactorySatisfactorySatisfactory320075.7

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Stringerlinear ft.8,9775,8291,801898449
Steel Protective Coatingsq. ft.56,37027,78714,49011,2742,819
Deck
Reinforced Concrete Decksq. ft.18,96011,1335,5882,2390
Wearing Surfacessq. ft.18,96017,0641,89600
Superstructure
Steel Trusslinear ft.94570923600
Steel Protective Coatingsq. ft.35,10024,5708,7751,7550
Steel Floor Beamlinear ft.1,5451,0813091550
Steel Protective Coatingsq. ft.17,76014,2082,6648880
Steel Gusset Plateeach96464640
Steel Protective Coatingsq. ft.96067228800
Substructure
Masonry Pier Walllinear ft.1401291100
Masonry Abutmentlinear ft.1423832720
Reinforced Concrete Pile Cap/Footinglinear ft.20200
Joints
Strip Seal Jointlinear ft.216151322211
Bearings
Movable Bearingeach40400
Steel Protective Coatingsq. ft.2016400
Fixed Bearingeach40400
Steel Protective Coatingsq. ft.2016400