I81
Carrying I81 over FLAT CREEK
4.70M.FROM JEFFERSON CO.L, Hamblen, Tennessee
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: I81
The I81 bridge in Hamblen, Tennessee carries I81 over FLAT CREEK. It was built in 1970, making it 56 years old today. The structure is built primarily of concrete continuous and spans 2 sections, stretching 6.8 meters (22 feet) end to end. Daily traffic averages 45,697 vehicles, placing it in the heavily-trafficked tier of Tennessee bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 3/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 32.4 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How I81 compares
Live comparison across Tennessee.
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 How the historical reference is calculated.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
- Concrete Continuous
- Number of Spans
- 2
- Structure Length
- 6.8 m (22 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 45,697 vehicles/day
- Structure Number
- 32I00810019
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
I81 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 I81 against other structures in Hamblen and across Tennessee. Tennessee 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 I81?
I81 in Hamblen, Tennessee on the FHWA's 0–9 scale.
How often is I81 inspected?
I81'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 45,697 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I81 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 I81?
I81 has an NBI inventory load rating of 32.4 metric tons.
Who is responsible for maintaining I81?
I81 is owned and maintained by State Highway Agency.
How old is I81 and does age affect safety?
I81 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.