Structure 22300690004600 · Strafford County, NH

Oak Street over Csx

Carries Oak Street over Csx, Dover-rollinsford Tl.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 2 of 9.

How ratings work
Deck3/9 · Serious
Superstructuresets the rating2/9 · Critical
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT65 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9Superstructure 2/9 · sets the ratingSubstructure 5/9

65 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 bridge of this kind.

Built1890rebuilt 1928
Length65.0 ft19.8 m
Daily traffic8,749counted 2023
Last inspectedNovember 2024every 8 months

Location

StateNew Hampshire
CountyStrafford
LocationDover-rollinsford Tl
CarriesOak Street
CrossesCsx
Coordinates43.20715, -70.86459

Physical Characteristics

MaterialSteel
DesignOther
Total Length65.0 ft (19.8 m)
Max Span63.0 ft (19.2 m)
Deck Width26.6 ft (8.1 m)
Deck Area160.4 sq m
Main Spans1
Year Built1890 (reconstructed 1928)

Traffic

Avg Daily Traffic8,749 (2023)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 8 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour CriticalNot applicable
Structure Number022300690004600

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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