Structure 19700810009300 · Rockingham County, NH

Nh111 over I-95

Carries Nh111 over I-95, 1.2 Mi Jct RTE 1.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT296 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

296 ft end to end, longest span 145 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1975rebuilt 2015
Length295.9 ft90.2 m
Daily traffic7,327counted 2023
Last inspectedJuly 2023every 24 months

Location

StateNew Hampshire
CountyRockingham
Location1.2 Mi Jct RTE 1
CarriesNh111
CrossesI-95
Coordinates42.97451, -70.85394

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length295.9 ft (90.2 m)
Max Span145.0 ft (44.2 m)
Deck Width51.5 ft (15.7 m)
Deck Area1416.1 sq m
Main Spans2
Year Built1975 (reconstructed 2015)

Traffic

Avg Daily Traffic7,327 (2023)
Truck Traffic4%
Lanes On Bridge2
Lanes Under Bridge9

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number019700810009300

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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