Structure 7801500006900 · Rockingham County, NH

Nh 87 over Lamprey River Overflow

Carries Nh 87 over Lamprey River Overflow, 1.25 Mi SE Jct Nh 125.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 26 ft across. 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, so those are drawn as typical for a culvert.

Built200422 years old
Length25.6 ft7.8 m
Daily traffic2,689counted 2023
Last inspectedApril 2023every 24 months

Location

StateNew Hampshire
CountyRockingham
Location1.25 Mi SE Jct Nh 125
CarriesNh 87
CrossesLamprey River Overflow
Coordinates43.04952, -71.03227

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length25.6 ft (7.8 m)
Max Span24.0 ft (7.3 m)
Deck Area74.1 sq m
Main Spans1
Year Built2004

Traffic

Avg Daily Traffic2,689 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number007801500006900

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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