Structure 12701440004200 · Hillsborough County, NH

Nh111 over Nashua River

Carries Nh111 over Nashua River, .7 Mi From Nashua Tl.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT252 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

252 ft end to end, longest span 78 ft: about 3 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 deck arch.

Built1950rebuilt 1982
Length252.0 ft76.8 m
Daily traffic12,103counted 2023
Last inspectedMay 2024every 24 months

Location

StateNew Hampshire
CountyHillsborough
Location.7 Mi From Nashua Tl
CarriesNh111
CrossesNashua River
Coordinates42.71284, -71.54867

Physical Characteristics

MaterialConcrete Continuous
DesignArch - Deck
Total Length252.0 ft (76.8 m)
Max Span78.1 ft (23.8 m)
Deck Width45.9 ft (14 m)
Deck Area1075.2 sq m
Main Spans2
Year Built1950 (reconstructed 1982)

Traffic

Avg Daily Traffic12,103 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number012701440004200

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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