Structure 19001270009700 · Rockingham County, NH

Nh108 over Lamprey River

Carries Nh108 over Lamprey River, .4 Mi From Jct. Rt. 152.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT66 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

66 ft end to end. Lengths and the car 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.

Built195571 years old
Length65.9 ft20.1 m
Daily traffic10,702counted 2023
Last inspectedJuly 2024every 24 months

Location

StateNew Hampshire
CountyRockingham
Location.4 Mi From Jct. Rt. 152
CarriesNh108
CrossesLamprey River
Coordinates43.08208, -70.93498

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length65.9 ft (20.1 m)
Max Span61.0 ft (18.6 m)
Deck Width35.1 ft (10.7 m)
Deck Area215.1 sq m
Main Spans1
Year Built1955

Traffic

Avg Daily Traffic10,702 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number019001270009700

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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