Structure 10001160008200 · Sullivan County, NH

I-89 SB over Nh 10

Carries I-89 SB over Nh 10, 2.1 Mi From Springfield T.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT89 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

89 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.

Built1967rebuilt 2001
Length88.9 ft27.1 m
Daily traffic9,692counted 2023
Last inspectedApril 2023every 24 months

Location

StateNew Hampshire
CountySullivan
Location2.1 Mi From Springfield T
CarriesI-89 SB
CrossesNh 10
Coordinates43.49861, -72.13301

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length88.9 ft (27.1 m)
Max Span84.0 ft (25.6 m)
Deck Width44.0 ft (13.4 m)
Deck Area363.1 sq m
Main Spans1
Year Built1967 (reconstructed 2001)

Traffic

Avg Daily Traffic9,692 (2023)
Truck Traffic9%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number010001160008200

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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