Total bridges
1,127
Public highway bridges in Collin County
County profile · official public datasets
Collin County, TX
1,127 public highway bridges tracked in the FHWA National Bridge Inventory: 67% rated Good, 32.9% Fair, 0.1% Poor.
- 1,127
- Public bridges
- 67%
- Good condition
- 0.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Collin 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 36%
- lowest Poor share in state
- 0.1%
- Poor-condition share
- 1,127
- public highway bridges
- 1998
- 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.
Collin County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Collin County ranks #89 of 247 Texas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0.1%). Collin County, Texas contains 1,127 public highway bridges. Roughly 67% are rated “Good,” 32.9% “Fair,” and 0.1% “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%
755 of 1,127 rated 7-9
Fair condition
32.9%
371 of 1,127 rated 5-6
Poor condition
0.1%
1 of 1,127 rated 4 or below
In-state Poor-share rank
#89 of 247
Among Texas counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 1,127 NBI-tracked bridges by lowest applicable component rating.
Good 67% (755)
Fair 32.9% (371)
Poor 0.1% (1)
Collin County's Poor-condition bridges carry 500 vehicle crossings a day
That is 0% of the county's reported daily bridge traffic on 0.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 500 crossings a day against 15,076 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 1,127 of 1,127 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
7% of Collin County's bridges have passed the 50-year mark
79 of the 1,127 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% 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
STACY RD EB over COTTONWOOD CREEK, built 2001, carries 500 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 500 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Collin County's bridges were built
1,127 bridges with a recorded construction year, grouped by decade
- 1920s 1
1920–1929
1 bridges
- 1930s 2
1930–1939
2 bridges
- 1940s 9
1940–1949
9 bridges
- 1950s 29
1950–1959
29 bridges
- 1960s 11
1960–1969
11 bridges
- 1970s 76
1970–1979
76 bridges
- 1980s
1980–1989
163 bridges
- 1990s
1990–1999
277 bridges
- 2000s
2000–2009
307 bridges
- 2010s
2010–2019
224 bridges
- 2020s 28
2020–2029
28 bridges
What this shows Construction peaked in the 2000s, when 307 of the county's bridges still in the inventory were built, which is 27.2% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year is 1998, 18 years newer than the Texas average of 1980.
How Collin County compares with Texas's closest counties by inventory size
The 5 Texas counties nearest Collin County in number of bridges, with their condition splits. Its 0.1% Poor share is the 1st-lowest of these 6. Its average build year of 1998 against a peer-group mean of 1991 is 7 years newer.
Showing the 5 closest of 246 Texas counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Williamson County | 1,170 | 67.4% | 32.2% | 0.3% | 1995 |
| Collin County (this page) | 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 |
| McLennan County | 714 | 51.8% | 46.2% | 2% | 1980 |
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 Collin 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 Collin County, both outside Texas so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside TX (1,127 bridges here).
- Tulsa County, OK · 1,135 bridges
- Riverside County, CA · 1,117 bridges
- Clark County, NV · 1,141 bridges
- Pima County, AZ · 1,150 bridges
Similar average build year
Nearest mean year-built outside TX (1998 here).
- Orange County, FL · avg 1998 · 885 bridges
- Pipestone County, MN · avg 1998 · 185 bridges
- Hyde County, NC · avg 1998 · 75 bridges
- Hertford County, NC · avg 1998 · 58 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (755)
US 75 SBML
GoodOver: THROCKMORTON CREEK
3.1 MI S OF FM 455, Collin, TX
Built 2017 Load: 32.7 t ADT: 25,495
W FOSTER CROSSING
GoodOver: US 75
3.8 MI N OF SH 121, Collin, TX
Built 2019 Load: 32.7 t ADT: 1,561
US 75 NBFR
GoodOver: THROCKMORTON CREEK
3.1 MI S OF FM 455, Collin, TX
Built 2017 Load: 32.7 t ADT: 7,215
US 75 NBML
GoodOver: Throckmorton Creek
3.5 Mi N of FM 107, Collin, TX
Built 2019 Load: 32.7 t ADT: 39,405
US 75 SBFR
GoodOver: THROCKMORTON CREEK
3.1 MI S OF FM 455, Collin, TX
Built 2017 Load: 32.7 t ADT: 2,150
THROCKMORTON ROAD
GoodOver: US 75
3.1 MI N OF SH 121, Collin, TX
Built 2019 Load: 32.7 t ADT: 101
ROSAMOND PKWY
GoodOver: US 75
4.16 MI S OF FM 121, Collin, TX
Built 2019 Load: 32.7 t ADT: 84
SH 289
GoodOver: LITTLE ELM CREEK TRIB.
2.15 MI S OF GRAYSON CL, Collin, TX
Built 2016 Load: 32.7 t ADT: 20,100
SH 289
GoodOver: LITTLE ELM CREEK TRIB
8.90 MI N OF US 380, Collin, TX
Built 2014 Load: 32.7 t ADT: 10,375
SH 289
GoodOver: PARVIN BRANCH
0.4 MI S OF US 380, Collin, TX
Built 2005 Load: 32.7 t ADT: 35,557
SH 289
GoodOver: DOE BRANCH
0.10 MI S OF FM 455, Collin, TX
Built 2013 Load: 32.7 t ADT: 10,375
SH 289
GoodOver: DOE BRANCH
6 MI N OF US 380, Collin, TX
Built 2013 Load: 32.7 t ADT: 14,797
SH 289
GoodOver: DOE BRANCH
5.3 MI N OF US 380, Collin, TX
Built 2013 Load: 32.7 t ADT: 14,797
SH 289
GoodOver: DOE BRANCH
3.9 MI N OF US 380, Collin, TX
Built 2013 Load: 32.7 t ADT: 20,593
US 380
GoodOver: WILSON CREEK
0.80 MI W OF FM 1461, Collin, TX
Built 1996 Load: 32.7 t ADT: 39,566
US 380
GoodOver: TICKY CREEK
0.4 MI W OF FM 982, Collin, TX
Built 1999 Load: 32.7 t ADT: 32,670
US 380
GoodOver: E FORK TRINITY RIVER REL
1.85 MI E OF SH 5, Collin, TX
Built 1999 Load: 32.7 t ADT: 31,689
SH 78
GoodOver: DRAW
AT INT US 380 & SH 78, Collin, TX
Built 2012 Load: 32.7 t ADT: 18,022
US 380
GoodOver: DRAW
1MI E of SH78 & 380, Collin, TX
Built 2013 Load: 32.7 t ADT: 18,022
US 380
GoodOver: ELM CREEK
1.75 MI E OF SH 78, Collin, TX
Built 2012 Load: 32.7 t ADT: 16,671
US 380
GoodOver: BRUSHY CREEK
4.25 MI E OF SH 78, Collin, TX
Built 2012 Load: 32.7 t ADT: 13,728
MAIN ST
GoodOver: US 380
2.5 MI S OF UNIV DR, Collin, TX
Built 2013 Load: 32.7 t ADT: 2,789
SH 289
GoodOver: US 380 FRONTAGE ROADS
AT US 380 & SH 289, Collin, TX
Built 2012 Load: 32.7 t ADT: 22,974
US 380 EB
GoodOver: BNSF RAILROAD
0.55 MI W of SH 289, Collin, TX
Built 2017 Load: 32.7 t ADT: 29,549
US 380
GoodOver: SH 289
US 380 AT SH 289, Collin, TX
Built 2019 Load: 32.7 t ADT: 26,200
US 380
GoodOver: DNT
US 380 AT DNT, Collin, TX
Built 2019 Load: 32.7 t ADT: 26,200
SH 78
GoodOver: BNSF RR
6.70 MI S OF US 380, Collin, TX
Built 1972 Load: 32.7 t ADT: 9,383
SH 78 EB
GoodOver: MAXWELL CREEK
1.30 MI SW OF FM 544, Collin, TX
Built 1999 Load: 32.7 t ADT: 13,298
SH 78 WB
GoodOver: MAXWELL CREEK
1.30 MI SW OF FM 544, Collin, TX
Built 1999 Load: 32.7 t ADT: 13,298
SH 78 WB
GoodOver: MUDDY CREEK
1.00 MI SW OF FM 544, Collin, TX
Built 2001 Load: 32.7 t ADT: 13,298
SH 78 EB
GoodOver: MUDDY CREEK
1.00 MI SW OF FM 544, Collin, TX
Built 2001 Load: 32.7 t ADT: 13,298
SH 78
GoodOver: MOORE LN
1.25 MI NE OF SH 205, Collin, TX
Built 2014 Load: 32.7 t ADT: 16,934
SH 121 NB
GoodOver: DNT FRONTAGE ROADS
DNT/SH 121 INTERCHANGE, Collin, TX
Built 2009 Load: 32.7 t ADT: 55,316
SH 121 SB
GoodOver: DNT FRONTAGE ROADS
DNT/SH 121 INTERCHANGE, Collin, TX
Built 2009 Load: 32.7 t ADT: 55,316
SH 121 SBFR
GoodOver: W ROWLETT CREEK
0.1 MI W OF FM 2478, Collin, TX
Built 2005 Load: 32.7 t ADT: 16,761
SRT SBML
GoodOver: W ROWLETT CREEK
0.1 MI W OF FM 2478, Collin, TX
Built 2005 Load: 32.7 t ADT: 55,624
SH 121 SB
GoodOver: CUSTER RD (FM 2478)
5.5 MI W OF US 75, Collin, TX
Built 2005 Load: 32.7 t ADT: 55,624
SH 121 NB
GoodOver: CUSTER RD (FM 2478)
5.5 MI W OF US 75, Collin, TX
Built 2005 Load: 32.7 t ADT: 55,624
SH 121 SBFR
GoodOver: COTTONWOOD CREEK
1.7 MI W OF US 75, Collin, TX
Built 2005 Load: 32.7 t ADT: 9,351
SH 121 NBFR
GoodOver: COTTONWOOD CREEK
1.7 MI W OF US 75, Collin, TX
Built 2005 Load: 32.7 t ADT: 27,894
SH 121
GoodOver: HUGULEYS BRANCH
4.1 MI W OF US 75, Collin, TX
Built 2005 Load: 32.7 t ADT: 76,084
SH 121
GoodOver: WATTERS BRANCH
3.4 MI W OF US 75, Collin, TX
Built 2005 Load: 32.7 t ADT: 76,084
SH 121
GoodOver: SLOAN CREEK
0.4 MI W OF US 75, Collin, TX
Built 2005 Load: 32.7 t ADT: 22,000
SRT SBML
GoodOver: PARKWOOD BOULEVARD
0.5 MI NE OF DNT, Collin, TX
Built 2008 Load: 32.7 t ADT: 105,520
SRT NBML
GoodOver: PARKWOOD BOULEVARD
0.5 MI NE OF DNT, Collin, TX
Built 2008 Load: 32.7 t ADT: 65,518
SH 121 NB RAMP A
GoodOver: SRT NB ON RAMP B
0.53 MI NE OF DNT, Collin, TX
Built 2009 Load: 32.7 t ADT: 21,000
SRT SBML
GoodOver: SH 289
AT SH 289 (PRESTON) INT, Collin, TX
Built 2008 Load: 32.7 t ADT: 55,316
SRT NB ML
GoodOver: SH 289
AT SH 289 (PRESTON) INT, Collin, TX
Built 2008 Load: 32.7 t ADT: 65,518
SH 289
GoodOver: SH 121 FRONTAGE ROADS
AT INT SH 121 & SH 289, Collin, TX
Built 2008 Load: 32.7 t ADT: 22,081
SH 121 SB FR
GoodOver: WHITE ROCK CREEK
1.4 MI NE OF SH 289, Collin, TX
Built 2008 Load: 32.7 t ADT: 20,544
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.