THORNTONS FERRY RD
Carrying THORNTONS FERRY RD over BEAVER BROOK
3.2 MI FR MERRIMACK TL, Hillsborough, New Hampshire
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: THORNTONS FERRY RD
The THORNTONS FERRY RD bridge in Hillsborough, New Hampshire carries THORNTONS FERRY RD over BEAVER BROOK. It was built in 1970, making it 56 years old today. The structure is built primarily of steel and spans 2 sections, stretching 6.1 meters (20 feet) end to end. Daily traffic averages 388 vehicles, placing it in the lower-traffic tier of New Hampshire bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show culvert at 1/9. The weakest component sits in critical condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How THORNTONS FERRY RD 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 How the historical reference is calculated.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
- 1970
- Material
- Steel
- Number of Spans
- 2
- Structure Length
- 6.1 m (20 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 388 vehicles/day
- Structure Number
- 000701450010600
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
THORNTONS FERRY RD is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare THORNTONS FERRY RD against other structures in Hillsborough 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 THORNTONS FERRY RD?
THORNTONS FERRY RD in Hillsborough, New Hampshire on the FHWA's 0–9 scale.
How often is THORNTONS FERRY RD inspected?
THORNTONS FERRY RD'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 388 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. THORNTONS FERRY RD is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for THORNTONS FERRY RD?
An inventory load rating is not recorded for THORNTONS FERRY RD.
Who is responsible for maintaining THORNTONS FERRY RD?
THORNTONS FERRY RD is owned and maintained by City/Municipal Highway Agency.
How old is THORNTONS FERRY RD and does age affect safety?
THORNTONS FERRY RD was built in 1970, making it 56 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.