Total bridges
51
Public highway bridges in Knox County
County profile · official public datasets
Knox County, TX
51 public highway bridges tracked in the FHWA National Bridge Inventory: 33.3% rated Good, 64.7% Fair, 2% Poor.
- 51
- Public bridges
- 33.3%
- Good condition
- 2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Knox 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.
- 179th
- of 247 on Poor share
- 2%
- Poor-condition share
- 51
- public highway bridges
- 1971
- 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.
Knox County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Knox County ranks #179 of 247 Texas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2%). Knox County, Texas contains 51 public highway bridges. Roughly 33.3% are rated “Good,” 64.7% “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
33.3%
17 of 51 rated 7-9
Fair condition
64.7%
33 of 51 rated 5-6
Poor condition
2%
1 of 51 rated 4 or below
In-state Poor-share rank
#179 of 247
Among Texas counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 51 NBI-tracked bridges by lowest applicable component rating.
Good 33.3% (17)
Fair 64.7% (33)
Poor 2% (1)
Knox County's Poor-condition bridges carry 348 vehicle crossings a day
That is 1.1% 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 348 crossings a day against 596 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 51 of 51 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
58.8% of Knox County's bridges have passed the 50-year mark
30 of the 51 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 33.3% 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
SH 222 over BRAZOS RIVER, built 1960, carries 348 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 348 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Knox County's bridges were built
51 bridges with a recorded construction year, grouped by decade
- 1930s
1930–1939
12 bridges
- 1940s 2
1940–1949
2 bridges
- 1950s
1950–1959
8 bridges
- 1960s
1960–1969
7 bridges
- 1970s 2
1970–1979
2 bridges
- 1980s 1
1980–1989
1 bridges
- 1990s 1
1990–1999
1 bridges
- 2000s
2000–2009
12 bridges
- 2010s
2010–2019
6 bridges
What this shows Construction peaked in the 1930s, when 12 of the county's bridges still in the inventory were built, which is 23.5% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year is 1971, 9 years older than the Texas average of 1980.
How Knox County compares with Texas's closest counties by inventory size
The 5 Texas counties nearest Knox County in number of bridges, with their condition splits. Its 2% Poor share is the 5th-lowest of these 6. Its average build year of 1971 against a peer-group mean of 1969 is in line with the group.
Showing the 5 closest of 246 Texas counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Borden County | 52 | 53.8% | 46.2% | 0% | 1957 |
| Brooks County | 52 | 67.3% | 32.7% | 0% | 1987 |
| Garza County | 51 | 27.5% | 72.5% | 0% | 1962 |
| Motley County | 51 | 41.2% | 54.9% | 3.9% | 1970 |
| Knox County (this page) | 51 | 33.3% | 64.7% | 2% | 1971 |
| Hutchinson County | 50 | 28% | 72% | 0% | 1968 |
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 Knox 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 Knox County, both outside Texas so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside TX (51 bridges here).
- Jackson County, KY · 51 bridges
- Arecibo County, PR · 51 bridges
- Naguabo County, PR · 51 bridges
- San Lorenzo County, PR · 51 bridges
Similar average build year
Nearest mean year-built outside TX (1971 here).
- Wayne County, MI · avg 1971 · 1,026 bridges
- Baltimore County, MD · avg 1971 · 783 bridges
- Washington County, PA · avg 1971 · 655 bridges
- Linn County, OR · avg 1971 · 566 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (51)
SH 6
FairOver: DRAW
3.40 MI S OF US 82, Knox, TX
Built 1934 Load: 22.7 t ADT: 400
SH 6
FairOver: DUTCHMAN CREEK
4.15 MI S OF US 82, Knox, TX
Built 1934 Load: 22.7 t ADT: 400
SH 6
FairOver: SHEEP CREEK
8.45 MI N OF US 82, Knox, TX
Built 1936 Load: 23.6 t ADT: 395
SH 6
FairOver: DRAW
0.90 MI S OF US 82, Knox, TX
Built 1934 Load: 23.6 t ADT: 400
SH 6
FairOver: DRAW
3.35 MI S OF US 82, Knox, TX
Built 1934 Load: 23.6 t ADT: 400
SH 6
FairOver: CHINA BRANCH
7.40 MI S OF US 82, Knox, TX
Built 1934 Load: 23.6 t ADT: 396
SH 6
FairOver: CHINA BRANCH
9.90 MI S OF US 82, Knox, TX
Built 1934 Load: 23.6 t ADT: 396
US 82
FairOver: DRAW
9.90 MI W OF SH 6, Knox, TX
Built 1931 Load: 23.6 t ADT: 2,092
US 277
FairOver: LAKE CREEK RELIEF
1.45 MI NE OF FM 266, Knox, TX
Built 1931 Load: 23.6 t ADT: 3,276
SH 222
FairOver: UNION CREEK
0.35 MI E OF FM 2279, Knox, TX
Built 1956 Load: 23.6 t ADT: 348
FM 267
FairOver: Bull Turner Creek
1.20 MI S OF FM 1756, Knox, TX
Built 1947 Load: 23.6 t ADT: 165
FM 267
FairOver: DRAW
3.75 MI S OF FM 1756, Knox, TX
Built 1944 Load: 23.6 t ADT: 165
FM 1756
FairOver: CHINA CREEK
1.30 MI W OF SH 6, Knox, TX
Built 1953 Load: 23.6 t ADT: 100
FM 266
FairOver: DRAW
1.40 MI S OF US 277, Knox, TX
Built 1958 Load: 23.6 t ADT: 100
FM 2279
FairOver: DRAW
2.40 MI SW OF SH 222, Knox, TX
Built 1956 Load: 23.6 t ADT: 100
FM 267
FairOver: DRAW
2.80 MI NE OF FM 1756, Knox, TX
Built 1960 Load: 23.6 t ADT: 128
FM 267
FairOver: DRAW
1.95 MI NE OF FM 1756, Knox, TX
Built 1960 Load: 23.6 t ADT: 219
FM 2534
FairOver: WILD HORSE CREEK
1.25 MI E OF SH 6, Knox, TX
Built 1961 Load: 23.6 t ADT: 100
FM 2534
FairOver: DRAW
0.85 MI W OF FM 266, Knox, TX
Built 1960 Load: 23.6 t ADT: 100
CO RD 3600
FairOver: DRAW
2.9 MI E OF SH 6, Knox, TX
Built 1936 Load: 23.6 t ADT: 25
CR 1115
FairOver: LITTLE CROTON CREEK
3.0 MI NE OF SH 222, Knox, TX
Built 2007 Load: 24.5 t ADT: 50
SH 6
FairOver: S WICHITA RIVER
4.25 MI N OF US 82, Knox, TX
Built 2013 Load: 32.7 t ADT: 395
SH 6
FairOver: BRAZOS RIVER
6.35 MI S. OF US 82, Knox, TX
Built 2013 Load: 32.7 t ADT: 400
US 277 NB
FairOver: SH 222
5.8 MI S OF FM 266, Knox, TX
Built 2006 Load: 32.7 t ADT: 1,403
US 277 SB
FairOver: SH 222
5.80 MI S. OF FM 266, Knox, TX
Built 2007 Load: 32.7 t ADT: 1,237
US 277 NB
FairOver: FM 266
5.8 MI N OF SH 222, Knox, TX
Built 2006 Load: 32.7 t ADT: 2,100
US 277 SB
FairOver: FM 266
5.80 MI N. OF SH 222, Knox, TX
Built 2006 Load: 32.7 t ADT: 1,140
FM 267
FairOver: BRAZOS RIVER
3.65 MI S OF US 82, Knox, TX
Built 2000 Load: 32.7 t ADT: 205
FM 267
FairOver: DRAW
2.15 MI NE OF FM 1756, Knox, TX
Built 1960 Load: 32.7 t ADT: 128
US 277 BUS
FairOver: CORPS CHANNEL
0.55 MI S OF SH 222, Knox, TX
Built 1975 Load: 40.8 t ADT: 2,600
FM 267
FairOver: SOUTH WICHITA RIVER
6.05 MI S OF FM 1756, Knox, TX
Built 1984 Load: 40.8 t ADT: 165
FM 266
FairOver: LAKE CREEK
0.85 MI S OF US 277, Knox, TX
Built 1999 Load: 40.8 t ADT: 100
SH 222
FairOver: LAKE CREEK
3.40 MI SE OF US 277, Knox, TX
Built 1972 Load: 40.8 t ADT: 241
US 82
GoodOver: DRAW
0.40 MI W OF SH 6, Knox, TX
Built 1931 Load: 23.6 t ADT: 2,092
US 82
GoodOver: DRAW
0.75 MI W OF SH 6, Knox, TX
Built 1931 Load: 23.6 t ADT: 2,092
SH 222
GoodOver: DRAW
8.55 MI W OF FM 2279, Knox, TX
Built 1956 Load: 23.6 t ADT: 174
SH 222
GoodOver: DRAW
6.95 MI W OF FM 2279, Knox, TX
Built 1956 Load: 23.6 t ADT: 174
SH 222
GoodOver: DRAW
4.95 MI W OF FM 2279, Knox, TX
Built 1956 Load: 23.6 t ADT: 174
FM 2279
GoodOver: DRAW
3.10 MI SW OF SH 222, Knox, TX
Built 1956 Load: 23.6 t ADT: 100
FM 1292
GoodOver: CHINA BRANCH
0.15 MI W OF SH 6, Knox, TX
Built 1966 Load: 23.6 t ADT: 105
US 277 NB
GoodOver: CORPS CHANNEL
0.55 MI S OF SH 222, Knox, TX
Built 2006 Load: 32.7 t ADT: 1,403
US 277 NB
GoodOver: LAKE CREEK
1.20 MI NE OF FM 266, Knox, TX
Built 2006 Load: 32.7 t ADT: 1,140
US 277 SB
GoodOver: LAKE CREEK
1.20 MI NE OF FM 266, Knox, TX
Built 2006 Load: 32.7 t ADT: 1,140
US 277 SB
GoodOver: CORPS CHANNEL
0.6 MI S OF SH 322, Knox, TX
Built 2006 Load: 32.7 t ADT: 1,237
FM 266
GoodOver: BRAZOS RIVER
4.65 MI S OF US 82, Knox, TX
Built 2001 Load: 32.7 t ADT: 143
CO RD 1041
GoodOver: DUTCHMAN CREEK
4.0 MI S OF US 82, Knox, TX
Built 2013 Load: 32.7 t ADT: 10
CO RD 1755
GoodOver: GYP CREEK
2.5 MI SW OF SH 222, Knox, TX
Built 2011 Load: 32.7 t ADT: 40
CO RD 3600
GoodOver: DEADMAN CREEK
2.3 MI E OF SH 6, Knox, TX
Built 2002 Load: 32.7 t ADT: 25
CO RD 2400
GoodOver: CHINA CREEK
1.8 MI W OF SH 6, Knox, TX
Built 2013 Load: 32.7 t ADT: 30
CO RD 2451
GoodOver: CHINA CREEK
1.35 MI S OF FM 1756, Knox, TX
Built 2015 Load: 32.7 t ADT: 50
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.