Karnack Ave
Carrying Karnack Ave over Unnamed drainage
600' N of 51st St, Harrison, Texas
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: Karnack Ave
The Karnack Ave bridge in Harrison, Texas carries Karnack Ave over Unnamed drainage. It was built in 1950, making it 76 years old today. The structure is built primarily of steel continuous and spans 3 sections, stretching 21.6 meters (71 feet) end to end. Daily traffic averages 10 vehicles, placing it in the lower-traffic tier of Texas bridges. It is owned and maintained by Bureau of Fish and Wildlife.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 6/9, substructure 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 9.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How Karnack Ave compares
Live comparison across Texas.
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 How the historical reference is calculated.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
- 1950
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 21.6 m (71 ft)
- Deck Width
- 7.0 m (23 ft)
- Owner
- Bureau of Fish and Wildlife
- Avg Daily Traffic
- 10 vehicles/day
- Structure Number
- 000021594-68093
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 3/9, the substructure (piers and abutments) is in poor shape, with advanced wear flagged for priority repair.
How to read this record
Karnack Ave 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 Karnack Ave against other structures in Harrison and across Texas. Texas 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 Karnack Ave?
Karnack Ave in Harrison, Texas has a deck rating of 7/9, superstructure rating of 6/9, and substructure rating of 3/9 on the FHWA's 0–9 scale.
How often is Karnack Ave inspected?
Karnack Ave'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 10 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Karnack Ave 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 Karnack Ave?
Karnack Ave has an NBI inventory load rating of 9.1 metric tons.
Who is responsible for maintaining Karnack Ave?
Karnack Ave is owned and maintained by Bureau of Fish and Wildlife.
How old is Karnack Ave and does age affect safety?
Karnack Ave was built in 1950, making it 76 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.