US 4 over Smith River

Poor Condition97 years old2,087 vehicles/day

Location

StateNew Hampshire
CountyMerrimack
Location4.6 Mi From Wilmot Tl
CarriesUS 4
CrossesSmith River
Coordinates43.52990, -71.86989

Condition Ratings

Overall ConditionPoor
Deck6 (Satisfactory)
Superstructure4 (Poor)
Substructure4 (Poor)
Channel/Waterway5 (Fair)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length69.9 ft (21.3 m)
Max Span63.0 ft (19.2 m)
Deck Width26.6 ft (8.1 m)
Deck Area172.5 sq m
Main Spans1
Year Built1929 (reconstructed 1991)

Traffic

Avg Daily Traffic2,087 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 8 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Structure Number005801380009400

Nearby Bridges