NFA 1791 (SA 4204)
Carrying NFA 1791 (SA 4204) over ROSS BRANCH
2.5 M S OF ERIN, Houston, Tennessee
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
NFA 1791 (SA 4204) in Houston, Tennessee sits above 26% of rated Tennessee bridges on inventory load rating (26 t), while its 1968 build year is earlier than 71% of Houston's recorded-year cohort (118 bridges).
NFA 1791 (SA 4204) in Houston, Tennessee is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1968, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. The lowest applicable rating sets the federal condition category, so this Fair result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure TN:42017830011
INTERSTATE-ERA · CONCRETE · MULTI-SPAN · CULVERT-LED · TRACE-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MULTI-SPAN 2 spans
- CULVERT-LED Culvert-led
- TRACE-ADT Trace ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: NFA 1791 (SA 4204)
The NFA 1791 (SA 4204) bridge in Houston, Tennessee carries NFA 1791 (SA 4204) over ROSS BRANCH. It was built in 1968, making it 58 years old today. The structure is built primarily of concrete continuous and spans 2 sections, stretching 9.1 meters (30 feet) end to end. Daily traffic averages 39 vehicles, placing it in the lower-traffic tier of Tennessee bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range.
How NFA 1791 (SA 4204) compares
Age against the county: built in 1968, earlier than 84 of Houston's 118 bridges with a recorded construction year (71%), against a county median build year of 1982. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Tennessee bridges with a recorded inventory load rating (20,355 of 20,379 rated).
NFA 1791 (SA 4204) vs every rated Tennessee bridge
Inventory load rating (metric tons), FHWA NBI, this state
26 Top 74% higher than 26% of 20,355 bridges
rated Tennessee bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Houston inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 118 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1968
- Material
- Concrete Continuous
- Number of Spans
- 2
- Structure Length
- 9.1 m (30 ft)
- Deck Width
- 8.0 m (26 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 39 vehicles/day
- Structure Number
- 42017830011
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether NFA 1791 (SA 4204) 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 NFA 1791 (SA 4204) against other structures in Houston 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 NFA 1791 (SA 4204)?
NFA 1791 (SA 4204) in Houston, Tennessee on the FHWA's 0–9 scale.
How often is NFA 1791 (SA 4204) inspected?
NFA 1791 (SA 4204)'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 39 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. NFA 1791 (SA 4204) is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for NFA 1791 (SA 4204)?
NFA 1791 (SA 4204) has an NBI inventory load rating of 26.2 metric tons.
Who is responsible for maintaining NFA 1791 (SA 4204)?
NFA 1791 (SA 4204) is owned and maintained by County Highway Agency.
How old is NFA 1791 (SA 4204) and does age affect safety?
NFA 1791 (SA 4204) was built in 1968, making it 58 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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.