Total bridges
1,170
Public highway bridges in Williamson County
County profile · official public datasets
Williamson County, TX
1,170 public highway bridges tracked in the FHWA National Bridge Inventory: 67.4% rated Good, 32.2% Fair, 0.3% Poor.
- 1,170
- Public bridges
- 67.4%
- Good condition
- 0.3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Williamson County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 38%
- lowest Poor share in state
- 0.3%
- Poor-condition share
- 1,170
- public highway bridges
- 1995
- 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.
Williamson County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Williamson County ranks #93 of 247 Texas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0.3%). Williamson County, Texas contains 1,170 public highway bridges. Roughly 67.4% are rated “Good,” 32.2% “Fair,” and 0.3% “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
67.4%
789 of 1,170 rated 7-9
Fair condition
32.2%
377 of 1,170 rated 5-6
Poor condition
0.3%
4 of 1,170 rated 4 or below
In-state Poor-share rank
#93 of 247
Among Texas counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 1,170 NBI-tracked bridges by lowest applicable component rating.
Good 67.4% (789)
Fair 32.2% (377)
Poor 0.3% (4)
Williamson County's Poor-condition bridges carry 1,734 vehicle crossings a day
That is 0% of the county's reported daily bridge traffic on 0.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 434 crossings a day against 7,636 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 1,170 of 1,170 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
16.6% of Williamson County's bridges have passed the 50-year mark
194 of the 1,170 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 67.4% 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 70.6% of the county's Poor-condition bridge traffic
FM 619 over DRAW, built 1935, carries 1,224 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 4-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 1,734 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Williamson County's bridges were built
1,170 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1920s 33
1920–1929
33 bridges
- 1930s 17
1930–1939
17 bridges
- 1940s 13
1940–1949
13 bridges
- 1950s 51
1950–1959
51 bridges
- 1960s 58
1960–1969
58 bridges
- 1970s 39
1970–1979
39 bridges
- 1980s 139
1980–1989
139 bridges
- 1990s 149
1990–1999
149 bridges
- 2000s
2000–2009
377 bridges
- 2010s
2010–2019
221 bridges
- 2020s 72
2020–2029
72 bridges
What this shows Construction peaked in the 2000s, when 377 of the county's bridges still in the inventory were built, which is 32.2% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year is 1995, 15 years newer than the Texas average of 1980.
How Williamson County compares with Texas's closest counties by inventory size
The 5 Texas counties nearest Williamson County in number of bridges, with their condition splits. Its 0.3% Poor share is the 3rd-lowest of these 6. Its average build year of 1995 against a peer-group mean of 1993 is in line with the group.
Showing the 5 closest of 246 Texas counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Travis County | 1,544 | 63.9% | 35.9% | 0.2% | 1988 |
| Williamson County (this page) | 1,170 | 67.4% | 32.2% | 0.3% | 1995 |
| Collin County | 1,127 | 67% | 32.9% | 0.1% | 1998 |
| Denton County | 991 | 57.8% | 41.3% | 0.9% | 1994 |
| Fort Bend County | 795 | 72.8% | 24.7% | 2.5% | 1998 |
| El Paso County | 783 | 54.4% | 44.8% | 0.8% | 1986 |
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 Williamson 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 Williamson County, both outside Texas so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside TX (1,170 bridges here).
- Orange County, CA · 1,164 bridges
- Pima County, AZ · 1,150 bridges
- Clark County, NV · 1,141 bridges
- Tulsa County, OK · 1,135 bridges
Similar average build year
Nearest mean year-built outside TX (1995 here).
- Craighead County, AR · avg 1995 · 442 bridges
- Utah County, UT · avg 1995 · 271 bridges
- DeSoto County, MS · avg 1995 · 266 bridges
- Scotland County, MO · avg 1995 · 201 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (377)
FM 973
FairOver: BRUSHY CREEK RELIEF
0.2 MI S OF FM 1660, Williamson, TX
Built 2002 Load: 32.7 t ADT: 6,992
FM 971
FairOver: DRAW
2.60 MI E OF SH 95, Williamson, TX
Built 1978 Load: 32.7 t ADT: 413
FM 971
FairOver: DRAW
4.00 MI E OF SH 95, Williamson, TX
Built 1978 Load: 32.7 t ADT: 285
FM 1431 EB
FairOver: SPANISH OAK CREEK
2.1 MI E OF US 183, Williamson, TX
Built 2018 Load: 32.7 t ADT: 21,554
FM 1431 WB
FairOver: SPANISH OAK CREEK
2.1 MI E OF US 183, Williamson, TX
Built 2018 Load: 32.7 t ADT: 22,200
FM 1660
FairOver: SAN GABRIEL RIVER
0.30 MI S OF SH 29, Williamson, TX
Built 1987 Load: 32.7 t ADT: 2,034
FM 1660
FairOver: COTTONWOOD CREEK
3.0 MI S OF US 79, Williamson, TX
Built 2007 Load: 32.7 t ADT: 2,325
FM 3405
FairOver: DRAW
3.15 MI E OF US 183, Williamson, TX
Built 1979 Load: 32.7 t ADT: 2,715
FM 1105
FairOver: WILLIS CREEK
4.70 MI SW OF FM 487, Williamson, TX
Built 1956 Load: 32.7 t ADT: 719
FM 1460
FairOver: WEST FORK SMITH BRANCH
7.6 MI N OF US 79, Williamson, TX
Built 2002 Load: 32.7 t ADT: 21,345
FM 971
FairOver: YANKEE BRANCH
1.55 MI W OF SH 95, Williamson, TX
Built 1967 Load: 32.7 t ADT: 1,208
FM 734 EB
FairOver: RATTAN CREEK
1.8 MI S OF SH 45, Williamson, TX
Built 1990 Load: 32.7 t ADT: 23,278
FM 734 WB
FairOver: RATTAN CREEK
1.8 MI S OF SH 45, Williamson, TX
Built 1990 Load: 32.7 t ADT: 23,278
FM 734 EB (PARMER)
FairOver: SOUTH BRUSHY CREEK
2.2 MI S OF FM 1431, Williamson, TX
Built 1994 Load: 32.7 t ADT: 21,279
LIMMER LP (CR 102)
FairOver: DRAW
0.4 MI E OF CR 110, Williamson, TX
Built 2010 Load: 32.7 t ADT: 2,764
CR 130
FairOver: MUSTANG CREEK
0.35 MI N OF CHANDLER RD, Williamson, TX
Built 2013 Load: 32.7 t ADT: 1,000
CR 326
FairOver: YANKEE CREEK
0.25 MI W OF CR 335, Williamson, TX
Built 1991 Load: 32.7 t ADT: 146
CR 335
FairOver: YANKEE BRANCH
0.30 MI N OF FM 971, Williamson, TX
Built 2005 Load: 32.7 t ADT: 100
CR126
FairOver: DRAW
1.4 MI N OF SH 29, Williamson, TX
Built 2006 Load: 32.7 t ADT: 100
CR 121
FairOver: MILEHAM BRANCH
1.7 MI NE OF SH 29, Williamson, TX
Built 2005 Load: 32.7 t ADT: 100
CR 350
FairOver: DONAHOE CREEK
0.9 MI S OF CR 351, Williamson, TX
Built 1994 Load: 32.7 t ADT: 100
CR 347
FairOver: WILLIS CREEK
1.2 MI S OF FM 971, Williamson, TX
Built 1987 Load: 32.7 t ADT: 208
CR 327
FairOver: YANKEE BRANCH
0.37 MI W OF CR 301, Williamson, TX
Built 1980 Load: 32.7 t ADT: 90
CR 424
FairOver: TURKEY CREEK
4.50 MI S OF FM 1063, Williamson, TX
Built 2004 Load: 32.7 t ADT: 291
CR 424
FairOver: DRAW
1.65 MI N OF US 79, Williamson, TX
Built 1985 Load: 32.7 t ADT: 150
CR 434
FairOver: BRANCH OF BRUSHY CRK
3.30 MI NE OF FM 112, Williamson, TX
Built 1987 Load: 32.7 t ADT: 155
CR 436
FairOver: LONG BRANCH
4.00 MI S OF US 79, Williamson, TX
Built 1987 Load: 32.7 t ADT: 300
CR 450
FairOver: BRUSHY CREEK
1.05 MI S OF FM 112, Williamson, TX
Built 1984 Load: 32.7 t ADT: 262
CR 456
FairOver: BOGGY CREEK
2.00 MI N OF FM 1466, Williamson, TX
Built 2006 Load: 32.7 t ADT: 30
CR 455
FairOver: BRUSHY CREEK
1.10 MI S OF FM 619, Williamson, TX
Built 1992 Load: 32.7 t ADT: 245
CR 453
FairOver: BATTLEGROUND CREEK
2.40 MI NE OF SH 95, Williamson, TX
Built 2006 Load: 32.7 t ADT: 100
CR 406
FairOver: BOGGY CREEK
1.40 MI N OF FM 1660, Williamson, TX
Built 1994 Load: 32.7 t ADT: 162
CR 137
FairOver: BRUSHY CREEK
1.05 MI S OF FM 1660, Williamson, TX
Built 1984 Load: 32.7 t ADT: 5,385
CR 368
FairOver: NORTH FORK MUSTANG CREEK
0.5 MI N OF CR 369, Williamson, TX
Built 1997 Load: 32.7 t ADT: 150
CR 366
FairOver: SAN GABRIEL RIVER
0.60 MI S OF SH 29, Williamson, TX
Built 1982 Load: 32.7 t ADT: 817
CHANDLER RD
FairOver: MUSTANG CREEK
0.4 MI E OF CR 130, Williamson, TX
Built 2007 Load: 32.7 t ADT: 7,843
VAL VERDE DRIVE
FairOver: PECAN BRANCH
0.01 MI E OF MADRID DR, Williamson, TX
Built 1986 Load: 32.7 t ADT: 100
SHELL RD
FairOver: BERRY CREEK
1.1 MI S OF SH 195, Williamson, TX
Built 1992 Load: 32.7 t ADT: 4,856
RONALD REAGAN BLVD
FairOver: DRAW
0.26 MI NORTH OF FM 3405, Williamson, TX
Built 2008 Load: 32.7 t ADT: 9,678
RONALD REAGAN BLVD
FairOver: DRAW
1.3 MI WEST OF FM 2338, Williamson, TX
Built 2008 Load: 32.7 t ADT: 9,678
TERAVISTA PKWY
FairOver: DRAW
0.10 MI W OF SUNRISE RD, Williamson, TX
Built 2002 Load: 32.7 t ADT: 500
S EDMOND ST
FairOver: DRAIN
0.20 MI E OF US 79, Williamson, TX
Built 2000 Load: 32.7 t ADT: 500
E 3RD ST
FairOver: BULL BRANCH
0.5 MI E OF SPUR 95, Williamson, TX
Built 2004 Load: 32.7 t ADT: 610
AUSTIN AVENUE
FairOver: NORTH SAN GABRIEL RIVER
2.2 MI S OF IH 35, Williamson, TX
Built 1940 Load: 32.7 t ADT: 19,200
AUSTIN AVENUE
FairOver: SOUTH SAN GABRIEL RIVER
2.4 MI S OF IH 35, Williamson, TX
Built 1940 Load: 32.7 t ADT: 19,200
DB WOOD RD
FairOver: MID FK SAN GABRIEL RI
1.12 MI N OF SH 29, Williamson, TX
Built 2002 Load: 32.7 t ADT: 11,880
NE INNER LOOP
FairOver: PECAN BRANCH
0.20 MI NW OF FM 971, Williamson, TX
Built 1988 Load: 32.7 t ADT: 4,840
MCNEIL ROAD
FairOver: LAKE CREEK
0.30 MI NE OF IH 35, Williamson, TX
Built 1988 Load: 32.7 t ADT: 1,710
Little Elm Trail
FairOver: Buttercup Creek
1.8 M W OF US 183, Williamson, TX
Built 2016 Load: 32.7 t ADT: 1,400
LHS ACCESS RD
FairOver: DRAINAGE DITCH
0.4 MI E OF LAKELINE BLVD, Williamson, TX
Built 2003 Load: 32.7 t ADT: 250
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.