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)
W HOUSTON PKWY SB
FairOver: UP RAILROAD
1.17 MI S OF WILL CLAYTON, Harris, TX
Built 2001 Load: 32.7 t ADT: 16,065
TUCKERTON RD WB
FairOver: DETENTION BASIN
0.35 MI W OF BARKER CYPR, Harris, TX
Built 2013 Load: 32.7 t ADT: 2,000
NORMANDY ST NB
FairOver: BIG GULCH GULLY
0.4 MI S OF WALLISVILLE, Harris, TX
Built 1989 Load: 32.7 t ADT: 1,100
NORMANDY ST SB
FairOver: BIG GULCH GULLY
0.4 MI S OF WALLISVILLE, Harris, TX
Built 1989 Load: 32.7 t ADT: 1,100
WOODWIND LAKES DR
FairOver: ROLLING FORK CREEK
0.3 MI E OF WOODWIND BLVD, Harris, TX
Built 1993 Load: 32.7 t ADT: 200
RANCHSTONE DRIVE
FairOver: HCFCD DITCH
0.30 MI E OF JONES RD, Harris, TX
Built 1983 Load: 32.7 t ADT: 1,250
WEST RD EB
FairOver: WHITE OAK BAYOU
0.15 MI E OF RIO GRANDE, Harris, TX
Built 1988 Load: 32.7 t ADT: 12,145
WEST RD WB
FairOver: HCFCD DITCH
0.1 MI E OF BELTWAY 8, Harris, TX
Built 1998 Load: 32.7 t ADT: 14,014
WEST RD EB
FairOver: HCFCD DITCH
0.1 MI E OF BELTWAY 8, Harris, TX
Built 1998 Load: 32.7 t ADT: 13,669
PONY EXPRESS RD
FairOver: HCFCD DITCH E128-00-00
0.05 MI E OF LAZY MEADOWS, Harris, TX
Built 1995 Load: 32.7 t ADT: 200
RIO GRANDE DR
FairOver: WHITE OAK BAYOU
0.15 MI N OF WEST RD, Harris, TX
Built 1983 Load: 32.7 t ADT: 3,146
STEEPLEWAY BLVD NB
FairOver: S WHITEOAK BAYOU
0.25 MI NE OF US 290, Harris, TX
Built 1983 Load: 32.7 t ADT: 5,000
STEEPLEWAY BLVD SB
FairOver: S WHITEOAK BAYOU
0.25 MI NE OF US 290, Harris, TX
Built 1983 Load: 32.7 t ADT: 5,000
WORTHAM BLVD NB
FairOver: WHITE OAK BAYOU
0.7 MI N OF FM 1960, Harris, TX
Built 1989 Load: 32.7 t ADT: 250
WORTHAM BLVD SB
FairOver: WHITEOAK BAYOU
0.7 MI N OF FM 1960, Harris, TX
Built 1989 Load: 32.7 t ADT: 250
N ELDRIDGE PKWY NB
FairOver: CYPRESS CREEK
1.7 MI S OF GRANT RD, Harris, TX
Built 1989 Load: 32.7 t ADT: 9,894
IMPERIAL VALLEY DR
FairOver: TURKEY CREEK
0.25 MI N OF RICHEY RD, Harris, TX
Built 1975 Load: 32.7 t ADT: 16,298
SPANISH NEEDLE
FairOver: HCFCD DITCH
0.50 MI E OF GREENHOUSE, Harris, TX
Built 1983 Load: 32.7 t ADT: 1,500
TC JESTER BLVD
FairOver: CYPRESS CREEK
0.2 MI S OF CYPRESSWOOD, Harris, TX
Built 2009 Load: 32.7 t ADT: 2,000
ELDRIDGE PKWY SB
FairOver: TURKEY CR
0.20 MI N OF IH 10, Harris, TX
Built 1988 Load: 32.7 t ADT: 20,000
ALDINE WSTFIELD NB
FairOver: GREENS BAYOU
0.1 MI N OF BELTWAY 8, Harris, TX
Built 2006 Load: 32.7 t ADT: 13,910
ALDINE-WSTFIELD SB
FairOver: GREENS BAYOU
0.1 MI N OF BELTWAY 8, Harris, TX
Built 2005 Load: 32.7 t ADT: 13,910
BISSONNET ST EB
FairOver: BRAYS BAYOU
0.65 MI E OF US 59, Harris, TX
Built 1987 Load: 32.7 t ADT: 9,700
BISSONNET ST WB
FairOver: BRAYS BAYOU
0.65 MI E OF US 59, Harris, TX
Built 1987 Load: 32.7 t ADT: 9,700
BLALOCK RD NB
FairOver: BRICKHOUSE GULLY
0.11 MI S OF CLAY RD, Harris, TX
Built 2002 Load: 32.7 t ADT: 19,350
BOONE RD
FairOver: BRAYS BYU
0.10 MI N OF BELLAIRE, Harris, TX
Built 1978 Load: 32.7 t ADT: 9,887
BRIAR FOREST DR WB
FairOver: BUFFALO BAYOU
0.45 MI E OF S GESSNER, Harris, TX
Built 1985 Load: 32.7 t ADT: 37,170
CHIMNEY ROCK SB
FairOver: HUNTER CREEK
1.50 MI N OF WOODWAY, Harris, TX
Built 1989 Load: 32.7 t ADT: 8,000
CHIMNEY ROCK NB
FairOver: HUNTER CREEK
1.50 MI N OF WOODWAY, Harris, TX
Built 1989 Load: 32.7 t ADT: 8,000
CHIMNEY ROCK
FairOver: BUFFALO BAYOU
0.65 MI N OF WOODWAY, Harris, TX
Built 1989 Load: 32.7 t ADT: 8,000
CLEAR LAKE CITY WB
FairOver: HCFCD DITCH M
0.4 MI NE OF SH 3, Harris, TX
Built 1992 Load: 32.7 t ADT: 5,000
CLEAR LAKE CITY WB
FairOver: HORSEPEN BAYOU
0.3 MI NE OF SPACE CENTER, Harris, TX
Built 1993 Load: 32.7 t ADT: 5,000
CLINTON DR
FairOver: UP RR
0.20 MI W OF WAYSIDE DR, Harris, TX
Built 1988 Load: 32.7 t ADT: 12,160
DURHAM ST
FairOver: WHITE OAK BAYOU
0.40 MI N OF IH 10, Harris, TX
Built 1963 Load: 32.7 t ADT: 15,030
W FUQUA RD EB
FairOver: HCFCD C144-00-00
1.50 MI E OF S POST OAK, Harris, TX
Built 1984 Load: 32.7 t ADT: 8,770
W FUQUA RD WB
FairOver: HCFCD C144-00-00
1.50 MI E OF S POST OAK, Harris, TX
Built 1984 Load: 32.7 t ADT: 8,770
GESSNER RD NB
FairOver: GREENS BAYOU
0.3 MI S OF MILLS RD, Harris, TX
Built 1998 Load: 32.7 t ADT: 5,000
GESSNER RD SB
FairOver: GREENS BAYOU
0.3 MI S OF MILLS RD, Harris, TX
Built 1998 Load: 32.7 t ADT: 5,000
GREENS RD WB
FairOver: GREENS BAYOU
0.7 MI E OF IH 45, Harris, TX
Built 1976 Load: 32.7 t ADT: 11,060
GREENS RD EB
FairOver: GREENS BAYOU
0.7 MI E OF IH 45, Harris, TX
Built 1976 Load: 32.7 t ADT: 11,060
W GULF BANK RD EB
FairOver: VOGEL CREEK
0.40 MI E OF ANTOINE DR, Harris, TX
Built 1979 Load: 32.7 t ADT: 3,500
WACO ST
FairOver: UNION PACIFIC RR
0.70 MI N OF IH 10, Harris, TX
Built 1988 Load: 32.7 t ADT: 2,700
HOMESTEAD RD NB
FairOver: HUNTING BYU & HBT RR
0.2 MI N OF IH 610, Harris, TX
Built 1988 Load: 32.7 t ADT: 12,313
HOMESTEAD RD NBFR
FairOver: HUNTING BAYOU
0.2 MI N OF IH 610, Harris, TX
Built 1988 Load: 32.7 t ADT: 402
HOMESTEAD RD SB
FairOver: HUNTING BYU & HBT RR
0.2 MI N OF IH 610, Harris, TX
Built 1988 Load: 32.7 t ADT: 12,313
IMPERIAL VALLEY DR
FairOver: HCFCD DITCH
0.2 MI S OF BELTWAY 8, Harris, TX
Built 1977 Load: 32.7 t ADT: 13,590
LANGFIELD RD
FairOver: COLE CREEK
0.3 MI N OF TIDWELL RD, Harris, TX
Built 1975 Load: 32.7 t ADT: 2,842
MERCURY DR NB
FairOver: HCFCD DITCH
0.05 MI N OF IH 10, Harris, TX
Built 1993 Load: 32.7 t ADT: 10,000
MERCURY DR SB
FairOver: HCFCD DITCH
0.05 MI N OF IH 10, Harris, TX
Built 1993 Load: 32.7 t ADT: 10,000
NORMANDY ST SB
FairOver: GREENS BAYOU
0.30 MI N OF IH 10, Harris, TX
Built 1978 Load: 32.7 t ADT: 5,000
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.