US 4,NH 16,SP TPK
Carrying US 4,NH 16,SP TPK over SHAWAYTTUCK
2.5 MI FROM PORTSMOUTH T, Rockingham, New Hampshire
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: US 4,NH 16,SP TPK
The US 4,NH 16,SP TPK bridge in Rockingham, New Hampshire carries US 4,NH 16,SP TPK over SHAWAYTTUCK. It was built in 1983, making it 43 years old today. It was last reconstructed in 2021, extending its service life. The structure is built primarily of concrete and spans 1 section, stretching 14.6 meters (48 feet) end to end. Daily traffic averages 66,702 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. All reported major components score above the Poor range. Its NBI inventory load rating is 81.6 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How US 4,NH 16,SP TPK 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 How the historical reference is calculated.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
- 1983
- Last Reconstructed
- 2021
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 14.6 m (48 ft)
- Deck Width
- 51.0 m (167 ft)
- Owner
- State Toll Authority
- Avg Daily Traffic
- 66,702 vehicles/day
- Structure Number
- 018501030012400
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 8/9, the deck (driving surface) is in good shape and shows no significant wear.
- • At 8/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
How to read this record
This page shows what the last federal inspection recorded, not whether US 4,NH 16,SP TPK 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,SP TPK against other structures in Rockingham 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,SP TPK?
US 4,NH 16,SP TPK in Rockingham, 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,SP TPK inspected?
US 4,NH 16,SP TPK'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 66,702 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,SP TPK 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,SP TPK?
US 4,NH 16,SP TPK has an NBI inventory load rating of 81.6 metric tons.
Who is responsible for maintaining US 4,NH 16,SP TPK?
US 4,NH 16,SP TPK is owned and maintained by State Toll Authority.
How old is US 4,NH 16,SP TPK and does age affect safety?
US 4,NH 16,SP TPK was built in 1983, making it 43 years old and last reconstructed in 2021.
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.