Structure 8400760013500 · Strafford County, NH

Spring Street over Cocheco River

Carries Spring Street over Cocheco River, 1.38mi RTE 11.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT39 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

39 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 tee-beam bridge.

Built1926100 years old
Length39.0 ft11.9 m
Daily traffic770counted 2023
Last inspectedNovember 2024every 16 months

Location

StateNew Hampshire
CountyStrafford
Location1.38mi RTE 11
CarriesSpring Street
CrossesCocheco River
Coordinates43.39385, -71.08024

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length39.0 ft (11.9 m)
Max Span36.1 ft (11 m)
Deck Width29.9 ft (9.1 m)
Deck Area108.3 sq m
Main Spans1
Year Built1926

Traffic

Avg Daily Traffic770 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 16 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number008400760013500

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.

Nearby Bridges