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)
RM 2243
FairOver: DRAW
1.85 MI E OF TOLL 183A, Williamson, TX
Built 1956 Load: 23.6 t ADT: 6,543
SP 619
FairOver: DRAW
0.90 MI E OF FM 619, Williamson, TX
Built 1954 Load: 23.6 t ADT: 222
RM 2338
FairOver: DRAW
1.00 MI SE OF FM 970, Williamson, TX
Built 1957 Load: 23.6 t ADT: 1,332
RM 2338
FairOver: DRAW
1.80 MI SE OF FM 970, Williamson, TX
Built 1957 Load: 23.6 t ADT: 1,320
RM 2338
FairOver: COWAN CREEK
1.7 MI NW OF FM 3405, Williamson, TX
Built 1957 Load: 23.6 t ADT: 3,119
FM 973
FairOver: BATTLEGROUND CREEK
1.70 MI S OF US 79, Williamson, TX
Built 1990 Load: 23.6 t ADT: 6,963
FM 973
FairOver: AVERY BRANCH
5.10 MI S OF US 79, Williamson, TX
Built 1999 Load: 23.6 t ADT: 5,577
FM 971
FairOver: BOTTOM CREEK
5.15 MI E OF BI 35 M, Williamson, TX
Built 1964 Load: 23.6 t ADT: 3,081
FM 971
FairOver: HILL BRANCH
0.30 MI W OF SH 95, Williamson, TX
Built 1967 Load: 23.6 t ADT: 1,208
FM 2843
FairOver: DRAW
0.90 MI N OF FM 487, Williamson, TX
Built 1972 Load: 23.6 t ADT: 1,599
FM 734 (PARMER LN)
FairOver: DRAW
0.6 MI N OF FM 620, Williamson, TX
Built 1994 Load: 23.6 t ADT: 42,557
CR 347
FairOver: MIDDLE CREEK
0.15 MI E OF SH 95, Williamson, TX
Built 1989 Load: 23.6 t ADT: 430
CR 426
FairOver: TURKEY CREEK BRANCH
3.0 MI N OF US 79, Williamson, TX
Built 1990 Load: 23.6 t ADT: 160
CR 431
FairOver: LONG BRANCH
0.30 MI S OF US 79, Williamson, TX
Built 1986 Load: 23.6 t ADT: 180
CR 460
FairOver: DRY BRUSHY CREEK
2.80 MI S OF FM 1466, Williamson, TX
Built 1997 Load: 23.6 t ADT: 100
WASHBURN STREET
FairOver: BULL BRANCH
0.02 MI S OF THORNDALE ST, Williamson, TX
Built 1997 Load: 23.6 t ADT: 1,000
GATTIS SCHOOL RD
FairOver: DRY CREEK BRANCH
0.8 MI E OF LOOP 384, Williamson, TX
Built 1987 Load: 23.6 t ADT: 16,010
MAGER LN
FairOver: COTTONWOOD CREEK
0.1 MI E OF FM 1660, Williamson, TX
Built 1990 Load: 23.6 t ADT: 1,910
IH 35 SB FR
FairOver: WEST FORK SMITH BRANCH
0.7 MI S OF FM 2243, Williamson, TX
Built 1968 Load: 24.5 t ADT: 1,647
IH 35 SBFR
FairOver: DRAW
0.7 MI S OF FM 620, Williamson, TX
Built 1990 Load: 24.5 t ADT: 24,354
SH 29
FairOver: DRAIN
5.50 MI W OF US 183, Williamson, TX
Built 1923 Load: 24.5 t ADT: 14,018
US 183
FairOver: MASON CREEK
5.9 MI S OF SH 29, Williamson, TX
Built 1927 Load: 24.5 t ADT: 24,549
US 183
FairOver: HOUGHTON CREEK
7.6 MI S OF SH 29, Williamson, TX
Built 1927 Load: 24.5 t ADT: 30,552
US 183
FairOver: WALKER CREEK
1.4 MI N OF FM 1431, Williamson, TX
Built 1927 Load: 24.5 t ADT: 30,552
US 183
FairOver: SPANISH OAK CREEK
9.6 MI S OF SH 29, Williamson, TX
Built 1927 Load: 24.5 t ADT: 30,252
US 183
FairOver: CLUCK CREEK
1.6 MI S OF FM 1431, Williamson, TX
Built 1927 Load: 24.5 t ADT: 46,354
US 79
FairOver: DRAW
4.3 MI E JCT IH 35, Williamson, TX
Built 1926 Load: 24.5 t ADT: 37,811
US 79 NB
FairOver: MUSTANG CREEK
2.75 MI E OF FM 3349, Williamson, TX
Built 1952 Load: 24.5 t ADT: 11,513
E 4th Street
FairOver: DRAINAGE
0.95 MI E OF SH 95, Williamson, TX
Built 1923 Load: 24.5 t ADT: 4,860
US 79
FairOver: DRAINAGE DITCH
3.0 MI E OF FM 619, Williamson, TX
Built 1923 Load: 24.5 t ADT: 10,902
US 79
FairOver: DRAINAGE DITCH
3.35 MI E OF FM 619, Williamson, TX
Built 1923 Load: 24.5 t ADT: 10,902
FM 112
FairOver: DRAW
0.8 MI E OF SH 95, Williamson, TX
Built 1929 Load: 24.5 t ADT: 1,011
FM 112
FairOver: DRAW
6.70 MI E OF US 79, Williamson, TX
Built 1929 Load: 24.5 t ADT: 1,199
SH 29
FairOver: DRAW
3.40 MI W OF SH 95, Williamson, TX
Built 1955 Load: 24.5 t ADT: 3,467
SH 195 BUS
FairOver: DRAW
0.85 MI SE OF FM 970, Williamson, TX
Built 1926 Load: 24.5 t ADT: 11,410
FM 1466
FairOver: DRAW
0.15 MI E OF SP 277, Williamson, TX
Built 1940 Load: 24.5 t ADT: 1,067
FM 1105
FairOver: DONAHUE CREEK
0.10 MI S OF FM 487, Williamson, TX
Built 1956 Load: 24.5 t ADT: 448
FM 1460
FairOver: EAST FORK SMITH BRANCH
1.05 MI S OF BUS LP 35 M, Williamson, TX
Built 1936 Load: 24.5 t ADT: 204
FM 1460
FairOver: E FORK SMITH BR # 2
1.15 MI S OF BUS LP 35 M, Williamson, TX
Built 1936 Load: 24.5 t ADT: 204
CR 200
FairOver: LACKEY CREEK
3.10 MI N OF SH 29, Williamson, TX
Built 1991 Load: 24.5 t ADT: 4,198
CR 200
FairOver: LITTLE BEAR CREEK
4.70 MI N OF SH 29, Williamson, TX
Built 1936 Load: 24.5 t ADT: 928
CR 133
FairOver: S FORK OF MUSTANG CREEK
0.24 MI NORTH OF CR 132, Williamson, TX
Built 1980 Load: 24.5 t ADT: 650
CR 155
FairOver: WEIR BRANCH
0.7 MI EAST OF FM 1105, Williamson, TX
Built 1990 Load: 24.5 t ADT: 400
CR 245
FairOver: BERRY CREEK
4.00 MI N OF FM 2238, Williamson, TX
Built 1988 Load: 24.5 t ADT: 552
CR 143
FairOver: DRY BERRY CREEK
1.05 MI N OF SH 195, Williamson, TX
Built 1926 Load: 24.5 t ADT: 4,420
CR 232
FairOver: N Salado Creek
0.25 MI N OF FM 487, Williamson, TX
Built 1970 Load: 24.5 t ADT: 115
CR 208
FairOver: DRAW
1 MI N OF CR 218, Williamson, TX
Built 2003 Load: 24.5 t ADT: 40
CR 223
FairOver: BERRY CREEK
1.1 MI N OF TEXAS 138, Williamson, TX
Built 1980 Load: 24.5 t ADT: 390
CR 236
FairOver: N FORK SAN GABRIEL RIVER
2.60 MI SW OF US 183, Williamson, TX
Built 1987 Load: 24.5 t ADT: 618
CR 301
FairOver: DONAHOE CREEK
0.8 MI S OF FM 487, Williamson, TX
Built 1984 Load: 24.5 t ADT: 567
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.