Total bridges
50
Public highway bridges in Irion County
County profile · official public datasets
Irion County, TX
50 public highway bridges tracked in the FHWA National Bridge Inventory: 44% rated Good, 54% Fair, 2% Poor.
- 50
- Public bridges
- 44%
- Good condition
- 2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Irion County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- 181st
- of 247 on Poor share
- 2%
- Poor-condition share
- 50
- public highway bridges
- 1944
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Irion County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Irion County ranks #181 of 247 Texas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2%). Irion County, Texas contains 50 public highway bridges. Roughly 44% are rated “Good,” 54% “Fair,” and 2% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Good condition
44%
22 of 50 rated 7-9
Fair condition
54%
27 of 50 rated 5-6
Poor condition
2%
1 of 50 rated 4 or below
In-state Poor-share rank
#181 of 247
Among Texas counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 50 NBI-tracked bridges by lowest applicable component rating.
Good 44% (22)
Fair 54% (27)
Poor 2% (1)
Irion County's Poor-condition bridges carry 177 vehicle crossings a day
That is 0.1% of the county's reported daily bridge traffic on 2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 177 crossings a day against 1,725 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 50 of 50 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
98% of Irion County's bridges have passed the 50-year mark
49 of the 50 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 44% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 100% of the county's Poor-condition bridge traffic
FM 72 over SPRING CREEK, built 1934, carries 177 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 1-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 177 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Irion County's bridges were built
50 bridges with a recorded construction year, grouped by decade
- 1930s
1930–1939
32 bridges
- 1950s 9
1950–1959
9 bridges
- 1960s 8
1960–1969
8 bridges
- 1980s 1
1980–1989
1 bridges
What this shows Construction peaked in the 1930s, when 32 of the county's bridges still in the inventory were built, which is 64% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year is 1944, 36 years older than the Texas average of 1980.
How Irion County compares with Texas's closest counties by inventory size
The 5 Texas counties nearest Irion County in number of bridges, with their condition splits. Its 2% Poor share is the 6th-lowest of these 6. Its average build year of 1944 against a peer-group mean of 1967 is 23 years older.
Showing the 5 closest of 246 Texas counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Garza County | 51 | 27.5% | 72.5% | 0% | 1962 |
| Knox County | 51 | 33.3% | 64.7% | 2% | 1971 |
| Hutchinson County | 50 | 28% | 72% | 0% | 1968 |
| Oldham County | 50 | 42% | 58% | 0% | 1963 |
| Stonewall County | 50 | 38% | 62% | 0% | 1970 |
| Irion County (this page) | 50 | 44% | 54% | 2% | 1944 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Irion County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Irion County, both outside Texas so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside TX (50 bridges here).
- Oglethorpe County, GA · 50 bridges
- Randolph County, GA · 50 bridges
- Putnam County, IL · 50 bridges
- Simpson County, KY · 50 bridges
Similar average build year
Nearest mean year-built outside TX (1944 here).
- Bronx County, NY · avg 1945 · 311 bridges
- New York County, NY · avg 1945 · 247 bridges
- Hunterdon County, NJ · avg 1949 · 373 bridges
- Ciales County, PR · avg 1951 · 18 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (27)
US 67
FairOver: DRY DRAW
0.1 MI SW OF FM 72, Irion, TX
Built 1933 Load: 20.9 t ADT: 5,337
US 67
FairOver: DRY DRAW
13.9 MI E OF SH 163, Irion, TX
Built 1935 Load: 21.8 t ADT: 3,238
US 67
FairOver: BARNHART DRAW
0.4 MI E OF SH 163, Irion, TX
Built 1934 Load: 23.6 t ADT: 3,433
US 67
FairOver: HENDERSON DRAW
1.6 MI E OF SH 163, Irion, TX
Built 1934 Load: 23.6 t ADT: 3,188
US 67
FairOver: W DUTCH WOMAN DRAW
9.0 MI NE OF SH 163, Irion, TX
Built 1935 Load: 23.6 t ADT: 3,433
US 67
FairOver: DRY DRAW
10.4 MI NE OF SH 163, Irion, TX
Built 1935 Load: 23.6 t ADT: 3,238
US 67
FairOver: TANKERSLEY DRAW
1.3 MI NE OF FM 915, Irion, TX
Built 1935 Load: 23.6 t ADT: 3,661
US 67
FairOver: DRY DRAW
0.1 MI S OF RM 2469, Irion, TX
Built 1933 Load: 23.6 t ADT: 5,254
US 67
FairOver: DRY DRAW
1.1 MI SW OF RM 853, Irion, TX
Built 1933 Load: 23.6 t ADT: 4,914
US 67
FairOver: DRY DRAW
0.2 MI NE OF RM 853, Irion, TX
Built 1933 Load: 23.6 t ADT: 4,698
US 67
FairOver: DRY DRAW
2.1 MI NE OF RM 853, Irion, TX
Built 1933 Load: 23.6 t ADT: 4,698
US 67
FairOver: DRY DRAW
5.0 MI NE OF RM 853, Irion, TX
Built 1933 Load: 23.6 t ADT: 4,698
SH 163
FairOver: MID CONCHO RIVER REL
9.4 MI N JCT RM 2469, Irion, TX
Built 1957 Load: 23.6 t ADT: 267
SH 163
FairOver: DRAW
3.3 MI N JCT RM 2469, Irion, TX
Built 1957 Load: 23.6 t ADT: 267
RM 2469
FairOver: DRAW
8.1 MI NW OF US 67, Irion, TX
Built 1962 Load: 23.6 t ADT: 698
US 67
FairOver: DRY DRAW
13.2 MI NE OF SH 163, Irion, TX
Built 1935 Load: 24.5 t ADT: 3,238
US 67
FairOver: DRY DRAW
16.0 MI E OF SH 163, Irion, TX
Built 1935 Load: 24.5 t ADT: 3,238
US 67
FairOver: DRY DRAW
20.4 MI E OF SH 163, Irion, TX
Built 1935 Load: 24.5 t ADT: 3,900
SH 163
FairOver: DRAW
0.4 MI S OF US 67, Irion, TX
Built 1932 Load: 24.5 t ADT: 1,711
FM 915
FairOver: SPRING CREEK
0.6 MI SE OF US 67, Irion, TX
Built 1954 Load: 25.4 t ADT: 269
US 67
FairOver: BULL RUN CREEK
2.6 MI NE OF RM 853, Irion, TX
Built 1933 Load: 29.9 t ADT: 4,698
US 67
FairOver: TEE PEE DRAW
4.6 MI W OF SH 163, Irion, TX
Built 1934 Load: 31.7 t ADT: 3,524
US 67
FairOver: TEE PEE CREEK RELIEF
4.8 MI W OF SH 163, Irion, TX
Built 1934 Load: 31.7 t ADT: 3,524
US 67
FairOver: LOPEZ CREEK
0.4 MI SW OF RM 853, Irion, TX
Built 1933 Load: 31.7 t ADT: 4,914
SH 163
FairOver: MIDDLE CONCHO RIVER
7.0 MI S OF TOM GREEN C/L, Irion, TX
Built 1957 Load: 32.7 t ADT: 267
US 67
FairOver: ROCK PEN DRAW
0.1 MI NE OF FM 915, Irion, TX
Built 1935 Load: 36.3 t ADT: 3,661
US 67
FairOver: SEEP DRAW
15.1 MI E OF SH 163, Irion, TX
Built 1935 Load: 37.2 t ADT: 3,238
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges 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. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.