Total bridges
4,029
Public highway bridges in Harris County
County profile · official public datasets
Harris County, TX
4,029 public highway bridges tracked in the FHWA National Bridge Inventory: 50.7% rated Good, 48.7% Fair, 0.6% Poor.
- 4,029
- Public bridges
- 50.7%
- Good condition
- 0.6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Harris 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 43%
- lowest Poor share in state
- 0.6%
- Poor-condition share
- 4,029
- public highway bridges
- 1989
- 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.
Harris County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Harris County ranks #106 of 247 Texas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0.6%). Harris County, Texas contains 4,029 public highway bridges. Roughly 50.7% are rated “Good,” 48.7% “Fair,” and 0.6% “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
50.7%
2,042 of 4,029 rated 7-9
Fair condition
48.7%
1,963 of 4,029 rated 5-6
Poor condition
0.6%
24 of 4,029 rated 4 or below
In-state Poor-share rank
#106 of 247
Among Texas counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 4,029 NBI-tracked bridges by lowest applicable component rating.
Good 50.7% (2,042)
Fair 48.7% (1,963)
Poor 0.6% (24)
Harris County's Poor-condition bridges carry 472,127 vehicle crossings a day
That is 0.4% of the county's reported daily bridge traffic on 0.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 19,672 crossings a day against 26,874 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 4,029 of 4,029 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
22.1% of Harris County's bridges have passed the 50-year mark
892 of the 4,029 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 50.7% 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 24.6% of the county's Poor-condition bridge traffic
IH 45 NB over CROSSTIMBERS ST, built 1960, carries 116,204 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 24-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 472,127 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Harris County's bridges were built
4,029 bridges with a recorded construction year, grouped by decade
- 1910s 3
1910–1919
3 bridges
- 1920s 9
1920–1929
9 bridges
- 1930s 12
1930–1939
12 bridges
- 1940s 30
1940–1949
30 bridges
- 1950s 114
1950–1959
114 bridges
- 1960s
1960–1969
475 bridges
- 1970s
1970–1979
533 bridges
- 1980s
1980–1989
816 bridges
- 1990s
1990–1999
810 bridges
- 2000s
2000–2009
579 bridges
- 2010s
2010–2019
519 bridges
- 2020s 129
2020–2029
129 bridges
What this shows Construction peaked in the 1980s, when 816 of the county's bridges still in the inventory were built, which is 20.3% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1989, 9 years newer than the Texas average of 1980.
How Harris County compares with Texas's closest counties by inventory size
The 5 Texas counties nearest Harris County in number of bridges, with their condition splits. Its 0.6% Poor share is the 5th-lowest of these 6. Its average build year of 1989 against a peer-group mean of 1988 is in line with the group.
Showing the 5 closest of 246 Texas counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Harris County (this page) | 4,029 | 50.7% | 48.7% | 0.6% | 1989 |
| Dallas County | 3,230 | 42.5% | 56.4% | 1% | 1983 |
| Tarrant County | 2,617 | 58.2% | 41.4% | 0.4% | 1990 |
| Bexar County | 2,342 | 55% | 44.7% | 0.3% | 1983 |
| Travis County | 1,544 | 63.9% | 35.9% | 0.2% | 1988 |
| Williamson County | 1,170 | 67.4% | 32.2% | 0.3% | 1995 |
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 Harris 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 Harris County, both outside Texas so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside TX (4,029 bridges here).
- Los Angeles County, CA · 3,547 bridges
- Maricopa County, AZ · 2,847 bridges
- Cook County, IL · 1,721 bridges
- San Diego County, CA · 1,632 bridges
Similar average build year
Nearest mean year-built outside TX (1989 here).
- Mecklenburg County, NC · avg 1989 · 746 bridges
- Buffalo County, NE · avg 1989 · 459 bridges
- Dubuque County, IA · avg 1989 · 346 bridges
- Vernon County, LA · avg 1989 · 341 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (1,963)
US 59
FairOver: GREENS BAYOU
1.64 MI S OF BWY 8, Harris, TX
Built 1995 Load: 32.7 t ADT: 95,352
US 59 NB
FairOver: LEE ROAD
1.22 MI S OF BWY 8, Harris, TX
Built 1995 Load: 32.7 t ADT: 76,281
US 59 SB
FairOver: ALDINE BENDER RD
0.70 MI S OF BWY 8, Harris, TX
Built 1997 Load: 32.7 t ADT: 85,816
US 59 NB
FairOver: ALDINE BENDER RD
0.72 MI S OF BWY 8, Harris, TX
Built 1995 Load: 32.7 t ADT: 85,816
US 59 HOV
FairOver: LEE ROAD
1.22 MI S OF BWY 8, Harris, TX
Built 1997 Load: 32.7 t ADT: 19,330
US 59 SB
FairOver: GREENS RD
0.86 MI N OF BWY 8, Harris, TX
Built 1997 Load: 32.7 t ADT: 29,527
US 59 NB
FairOver: GREENS RD
0.86 MI N OF BWY 8, Harris, TX
Built 1997 Load: 32.7 t ADT: 25,573
US 59 NB
FairOver: RANKIN RD
1.85 MI N OF BWY 8, Harris, TX
Built 1997 Load: 32.7 t ADT: 25,573
US 59 NB
FairOver: WILL CLAYTON PKWY
3.12 MI N OF BWY 8, Harris, TX
Built 1997 Load: 32.7 t ADT: 25,573
US 59 NB
FairOver: BW 8 FR
5.0 MI S OF FM 1960, Harris, TX
Built 1995 Load: 32.7 t ADT: 86,330
BW 8 WB TO US59 SB
FairOver: US 59; BW 8 & Ramps
BWY8 /US59 N INTERCHANGE, Harris, TX
Built 2004 Load: 32.7 t ADT: 28,290
US 59 SB
FairOver: BENNINGTON; KING & RR
0.9 MI N OF IH 610, Harris, TX
Built 1994 Load: 32.7 t ADT: 102,746
US 59 NB
FairOver: BENNINGTON; KING & RR
0.9 MI N OF IH 610, Harris, TX
Built 1994 Load: 32.7 t ADT: 102,746
US 59 SB FR
FairOver: KING AVE AND RR
0.8 MI N OF IH 610, Harris, TX
Built 1994 Load: 32.7 t ADT: 1,910
US 59 NB FR
FairOver: BENNINGTON; KING AND RR
0.9 MI N OF IH 610, Harris, TX
Built 1994 Load: 32.7 t ADT: 2,317
US 59
FairOver: CROSSTIMBERS RD
1.40 MI N OF IH 610, Harris, TX
Built 1994 Load: 32.7 t ADT: 186,740
US 59 SB
FairOver: LAURA KOPPE RD
2.30 MI N OF IH 610, Harris, TX
Built 1995 Load: 32.7 t ADT: 91,989
US 59 SB & HOV
FairOver: TIDWELL RD
2.80 MI N OF IH 610, Harris, TX
Built 1995 Load: 32.7 t ADT: 91,989
TIDWELL HOV
FairOver: HOV SB BYPASS LN
3.00 MI N OF IH 610, Harris, TX
Built 1995 Load: 32.7 t ADT: 45,995
TIDWELL HOV T-RAMP
FairOver: US 59 SB ML & FR
3.00 MI N OF IH 610, Harris, TX
Built 1995 Load: 32.7 t ADT: 330
US 59 SB ON-RP #3
FairOver: US 59 SB OFF-RAMP #5
3.20 MI N OF IH 610, Harris, TX
Built 1995 Load: 32.7 t ADT: 6,593
US 59 NB & HOV
FairOver: LAURA KOPPE RD
2.30 MI N OF IH 610, Harris, TX
Built 1998 Load: 32.7 t ADT: 91,989
US 59 NB
FairOver: TIDWELL RD
2.80 MI N OF IH 610, Harris, TX
Built 1998 Load: 32.7 t ADT: 91,989
US 59 NB & HOV
FairOver: PARKER/SAUNDERS/HALLS BY
3.60 MI N OF IH 610, Harris, TX
Built 1995 Load: 32.7 t ADT: 91,989
US 59 SB
FairOver: PARKER/SAUNDERS/HALLS BY
3.60 MI N OF IH 610, Harris, TX
Built 1995 Load: 32.7 t ADT: 91,989
ELEV US59 SB FR
FairOver: JENSEN DR & SAUNDERS DR
3.9 MI N OF IH 610, Harris, TX
Built 1995 Load: 32.7 t ADT: 2,154
US 59 HOV
FairOver: US59SB;BENNINGTON AND RR
0.8 MI N OF IH 610, Harris, TX
Built 1996 Load: 32.7 t ADT: 18,670
US 59 NB FR
FairOver: HALLS BAYOU
3.6 MI N OF IH 610, Harris, TX
Built 1991 Load: 32.7 t ADT: 7,987
US 59 SB FR
FairOver: HALLS BAYOU
3.6 MI N OF IH 610, Harris, TX
Built 1991 Load: 32.7 t ADT: 4,745
US 59 SB
FairOver: CAVALCADE ST
0.50 MI S OF IH 610, Harris, TX
Built 1999 Load: 32.7 t ADT: 29,527
US 59 NB/IH 610 EB
FairOver: US 59 NB FR
AT US59/IH610 N LP., Harris, TX
Built 1997 Load: 32.7 t ADT: 6,592
US 59 HOV
FairOver: US59 SB AND CAVALCADE ST
0.50 MI S OF IH 610, Harris, TX
Built 2000 Load: 32.7 t ADT: 15,250
US 59 HOV
FairOver: US 59 SB
1.16 MI S OF IH610 & US59, Harris, TX
Built 1998 Load: 32.7 t ADT: 15,250
US 59 SB HOV RP
FairOver: US 59 SB & ENTR RAMP Z
1.17 MI S OF IH610 & US59, Harris, TX
Built 1998 Load: 32.7 t ADT: 12,270
US 59 SB EXIT
FairOver: RUNNELS
AT US59/IH10 INTERCHANGE, Harris, TX
Built 2003 Load: 32.7 t ADT: 20,620
US 59 NB ON-RAMP
FairOver: RUNNELS; BUFFALO BYU;ETC
CHENEVERT RD, Harris, TX
Built 2002 Load: 32.7 t ADT: 14,000
IH10 EXIT HAMILTON
FairOver: RUNNELS ST
US 59 AT RUNNELS ST, Harris, TX
Built 2002 Load: 32.7 t ADT: 14,000
US 59 SB
FairOver: RUIZ; RUNNELS; COMMERCE
US59/IH10 INTERCHANGE, Harris, TX
Built 2003 Load: 32.7 t ADT: 92,109
US 59 NB FR
FairOver: UP RR & LORRAINE ST
0.60 MI N OF IH10, Harris, TX
Built 1998 Load: 32.7 t ADT: 61,350
US 59 SB FR
FairOver: UP RR & LORRAINE ST
0.60 MI N OF IH10, Harris, TX
Built 1998 Load: 32.7 t ADT: 61,350
US 59 SB ENT RAMP
FairOver: US 59 SB EXIT RAMP W
1.18 MI S OF IH610 & US59, Harris, TX
Built 1998 Load: 32.7 t ADT: 15,250
US 59 NB RP V
FairOver: US 59 NB EXIT RAMP
1.18 MI S OF IH610 & US59, Harris, TX
Built 1998 Load: 32.7 t ADT: 15,250
US 59 HOV
FairOver: US 59 SB;RUNNELS;BUF BYU
AT US59/IH10 INTERCHANGE, Harris, TX
Built 2003 Load: 32.7 t ADT: 55,101
US59 NB TO IH10 EB
FairOver: UP RR; RUNNELS; BUF BYU
CONN TO US 59 NB, Harris, TX
Built 2002 Load: 32.7 t ADT: 86,000
RAMP K
FairOver: BUFFALO BAYOU
INTERSECTION RMP L, Harris, TX
Built 2002 Load: 32.7 t ADT: 86,000
KELLEY ST
FairOver: US 59
0.35 MI N OF IH 610, Harris, TX
Built 1975 Load: 32.7 t ADT: 8,440
SH 35 SB (TELEPH.)
FairOver: SIMS BAYOU
1.60 MI S OF IH 610, Harris, TX
Built 1993 Load: 32.7 t ADT: 15,087
SH 35 NB (TELEPH.)
FairOver: SIMS BAYOU
1.60 MI S OF IH 610, Harris, TX
Built 1993 Load: 32.7 t ADT: 12,056
SPUR 5 NB
FairOver: BRAYS BAYOU
0.95 MI S OF IH 45, Harris, TX
Built 1999 Load: 32.7 t ADT: 9,915
SP 5 SB
FairOver: IH45SB OFF-RPS & STREETS
NETTLETON TO CULLEN, Harris, TX
Built 1988 Load: 32.7 t ADT: 13,656
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.