US 4,NH 16,TPK SB
Carrying US 4,NH 16,TPK SB over LITTLE BAY,RD
DOVER-NEWINGTON T.L., Strafford, New Hampshire
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: US 4,NH 16,TPK SB
The US 4,NH 16,TPK SB bridge in Strafford, New Hampshire carries US 4,NH 16,TPK SB over LITTLE BAY,RD. It was built in 2018, making it 8 years old today. The structure is built primarily of steel continuous and spans 9 sections, stretching 502.5 meters (1649 feet) end to end. Daily traffic averages 33,175 vehicles, placing it in the heavily-trafficked tier of New Hampshire bridges. It is owned and maintained by State Toll Authority.
The latest FHWA inspection records show a deck rating of 8/9, superstructure at 8/9, substructure at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 36.6 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How US 4,NH 16,TPK SB compares
Live comparison across New Hampshire.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 2018
- Material
- Steel Continuous
- Number of Spans
- 9
- Structure Length
- 502.5 m (1649 ft)
- Deck Width
- 22.9 m (75 ft)
- Owner
- State Toll Authority
- Avg Daily Traffic
- 33,175 vehicles/day
- Structure Number
- 006502010002400
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in good condition (8/9), showing no significant deterioration.
- • The superstructure (beams and supports above the deck) is in good condition (8/9), showing no significant deterioration.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
This page shows what the last federal inspection recorded, not whether US 4,NH 16,TPK SB is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare US 4,NH 16,TPK SB against other structures in Strafford and across New Hampshire. New Hampshire bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for US 4,NH 16,TPK SB?
US 4,NH 16,TPK SB in Strafford, New Hampshire has a deck rating of 8/9, superstructure rating of 8/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is US 4,NH 16,TPK SB inspected?
US 4,NH 16,TPK SB's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 33,175 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. US 4,NH 16,TPK SB is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for US 4,NH 16,TPK SB?
US 4,NH 16,TPK SB has an NBI inventory load rating of 36.6 metric tons.
Who is responsible for maintaining US 4,NH 16,TPK SB?
US 4,NH 16,TPK SB is owned and maintained by State Toll Authority.
How old is US 4,NH 16,TPK SB and does age affect safety?
US 4,NH 16,TPK SB was built in 2018, making it 8 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.