I-293 Nh 3a Tpk S over Black Brook

Poor Condition70 years old22,005 vehicles/day

Location

StateNew Hampshire
CountyHillsborough
Location2.5mi S Hooksett T.l.
CarriesI-293 Nh 3a Tpk S
CrossesBlack Brook
Coordinates43.00976, -71.47682

Condition Ratings

Overall ConditionPoor
Deck5 (Fair)
Superstructure5 (Fair)
Substructure4 (Poor)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length74.1 ft (22.6 m)
Max Span69.9 ft (21.3 m)
Deck Width41.0 ft (12.5 m)
Deck Area282.5 sq m
Main Spans1
Year Built1956

Traffic

Avg Daily Traffic22,005 (2023)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 8 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Structure Number016100990006600

Nearby Bridges

I-293 Nh 3a Tpk N over Black Brook 0.0 mi Poor Front Street over Black Brook 0.1 mi Good I-293 Fee Tpk over Stark Way 0.2 mi Poor North Ramp over I-293 Fee Tpk 0.3 mi Fair I-293 Fee Tpk SB over Nh 3a 0.4 mi Good I-293 Fee Tpk NB over Nh 3a 0.5 mi Good South Ramp over I-293 Fee Tpk 0.5 mi Fair Salmon Street WB over Merrimack River Csx RD 0.6 mi Fair Salmon Street EB over Merrimack R Csx RD Ramp 0.6 mi Poor Ramp E(camp St) over Csx 0.7 mi Fair