Structure 10001360006800 · Sullivan County, NH

I-89 SB over Stocker Brook

Carries I-89 SB over Stocker Brook, .81 Mi Springfield Tl.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT29 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 29 ft across with 2 openings. 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.

Built196759 years old
Length28.9 ft8.8 m
Daily traffic9,692counted 2023
Last inspectedApril 2023every 24 months

Location

StateNew Hampshire
CountySullivan
Location.81 Mi Springfield Tl
CarriesI-89 SB
CrossesStocker Brook
Coordinates43.49003, -72.11345

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length28.9 ft (8.8 m)
Max Span13.8 ft (4.2 m)
Deck Width75.5 ft (23 m)
Deck Area202.4 sq m
Main Spans2
Year Built1967

Traffic

Avg Daily Traffic9,692 (2023)
Truck Traffic9%
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 Number010001360006800

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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