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 BELLFORT WB
FairOver: HCFCD DITCH
0.20 MI W OF S KIRKWOOD, Harris, TX
Built 1982 Load: 24.5 t ADT: 9,850
W BELLFORT EB
FairOver: WILLOW WATERHOLE BAYOU
0.5 MI E OF POST OAK RD, Harris, TX
Built 1964 Load: 24.5 t ADT: 4,960
W BELLFORT WB
FairOver: WILLOW WATERHOLE BAYOU
0.5 MI E OF POST OAK RD, Harris, TX
Built 1964 Load: 24.5 t ADT: 4,960
W BELLFORT AVE EB
FairOver: HCFCD DITCH
0.15 MI E OF FONDREN RD, Harris, TX
Built 1972 Load: 24.5 t ADT: 14,695
W BELLFORT AVE WB
FairOver: HCFCD DITCH
0.15 MI E OF FONDREN RD, Harris, TX
Built 1972 Load: 24.5 t ADT: 14,695
W BELLFORT AVE
FairOver: CHIMNEY ROCK DITCH
1.0 MI W OF S POST OAK RD, Harris, TX
Built 1955 Load: 24.5 t ADT: 29,940
BERKLEY ST
FairOver: PLUM CREEK
0.25 MI N OF LP 610, Harris, TX
Built 1989 Load: 24.5 t ADT: 8,420
BINGLE RD NB
FairOver: BRICKHOUSE GULLY
0.25 MI NE OF KEMPWOOD, Harris, TX
Built 1971 Load: 24.5 t ADT: 30,000
BINGLE RD SB
FairOver: BRICKHOUSE GULLY
0.25 MI NE OF KEMPWOOD, Harris, TX
Built 1972 Load: 24.5 t ADT: 30,000
BINGLE RD
FairOver: SPRING BRANCH
0.10 MI N OF WESTVIEW DR, Harris, TX
Built 1978 Load: 24.5 t ADT: 19,195
BIRNAMWOOD BLVD
FairOver: TURKEY CREEK
0.20 MI S OF FM 1960, Harris, TX
Built 1986 Load: 24.5 t ADT: 13,000
BISSONNET ST
FairOver: HCFCD DITCH
0.20 MI NE OF FONDREN RD, Harris, TX
Built 1960 Load: 24.5 t ADT: 36,140
BLUE RIDGE
FairOver: SIMS BAYOU
0.05 MI S OF W OREM, Harris, TX
Built 1968 Load: 24.5 t ADT: 500
BLALOCK RD NB
FairOver: HCFCD DITCH
0.20 MI N OF KEMPWOOD, Harris, TX
Built 1973 Load: 24.5 t ADT: 19,350
BLALOCK RD SB
FairOver: HCFCD DITCH
0.20 MI N OF KEMPWOOD, Harris, TX
Built 1973 Load: 24.5 t ADT: 19,350
BOLIN RD
FairOver: BRICKHOUSE GULLY
0.10 MI S OF UNDERHILL RD, Harris, TX
Built 1966 Load: 24.5 t ADT: 2,590
BOLIVIA BLVD
FairOver: COLE CREEK
0.4 MI N OF CREEKMONT, Harris, TX
Built 1965 Load: 24.5 t ADT: 6,480
BONHOMME RD
FairOver: HCFCD DITCH
0.15 MI S OF BEECHNUT ST, Harris, TX
Built 1964 Load: 24.5 t ADT: 2,350
BOONE RD
FairOver: HCFCD DITCH
0.55 MI S OF BELLAIRE, Harris, TX
Built 1964 Load: 24.5 t ADT: 5,900
BOONE RD
FairOver: HCFCD DITCH
0.25 MI S OF BEECHNUT ST, Harris, TX
Built 1978 Load: 24.5 t ADT: 11,000
BRAEBURN GLEN DR
FairOver: BRAYS BYU
0.20 MI N OF BISSONNET, Harris, TX
Built 1960 Load: 24.5 t ADT: 1,300
BRAEBURN VALLEY DR
FairOver: HCFCD DITCH
0.15 MI S OF BEECHNUT ST, Harris, TX
Built 1962 Load: 24.5 t ADT: 1,900
BRAES BAYOU DR
FairOver: BRAYS BYU
0.01 MI N OF BRAESWOOD, Harris, TX
Built 1960 Load: 24.5 t ADT: 1,930
BRAES BAYOU DR
FairOver: DRAW
0.20 MI N OF S BRAESWOOD, Harris, TX
Built 1962 Load: 24.5 t ADT: 1,930
N BRAESWOOD WB
FairOver: RENWICK DITCH
0.6 MI W OF CHIMNEY ROCK, Harris, TX
Built 1968 Load: 24.5 t ADT: 18,630
N BRAESWOOD WB
FairOver: POOR FARM DITCH
0.1 MI E OF BUFFALO SPDWY, Harris, TX
Built 1959 Load: 24.5 t ADT: 7,960
N BRAESWOOD BLVD
FairOver: CHIMNEY ROCK DITCH
0.8 MI S OF BEECHNUT ST, Harris, TX
Built 1963 Load: 24.5 t ADT: 7,180
S BRAESWOOD EB
FairOver: KEEGANS BYU
0.30 MI W OF S GESSNER, Harris, TX
Built 1973 Load: 24.5 t ADT: 14,615
S BRAESWOOD WB
FairOver: KEEGANS BYU
0.30 MI W OF S GESSNER, Harris, TX
Built 1973 Load: 24.5 t ADT: 14,615
BRAESWOOD BLVD NB
FairOver: BRAYS BAYOU
0.20 MI S OF HOLCOMBE, Harris, TX
Built 1964 Load: 24.5 t ADT: 13,869
BRAESWOOD BLVD SB
FairOver: BRAYS BAYOU
0.20 MI S OF HOLCOMBE, Harris, TX
Built 1964 Load: 24.5 t ADT: 13,869
S BRAESWOOD WB
FairOver: BRAYS BAYOU
0.5 MI E OF LP 610, Harris, TX
Built 1966 Load: 24.5 t ADT: 7,730
S BRAESWOOD EB
FairOver: BRAYS BAYOU
0.5 MI E OF LP 610, Harris, TX
Built 1966 Load: 24.5 t ADT: 7,730
S BRAESWOOD BLVD
FairOver: CHIMNEY ROCK DITCH
0.8 MI S OF BEECHNUT ST, Harris, TX
Built 1963 Load: 24.5 t ADT: 20,000
BRAESWOOD BLVD
FairOver: STORM DRAIN
0.20 MI NE OF HOLCOMBE, Harris, TX
Built 1950 Load: 24.5 t ADT: 15,000
BURDINE ST
FairOver: HCFCD DITCH
0.1 MI N OF SANFORD RD, Harris, TX
Built 1986 Load: 24.5 t ADT: 80
WOODWAY DR
FairOver: HCFCD DITCH
0.50 MI W OF S VOSS RD, Harris, TX
Built 1973 Load: 24.5 t ADT: 682
BURNING BUSH
FairOver: HCFCD DITCH
0.03 MI N OF HOPPER RD, Harris, TX
Built 1974 Load: 24.5 t ADT: 1,000
CAMPBELL RD
FairOver: BRICKHOUSE GULLY
0.10 MI S OF CLAY RD, Harris, TX
Built 1950 Load: 24.5 t ADT: 8,244
CARVEL ST
FairOver: HCFCD DITCH
0.05 MI W OF BINTLIFF, Harris, TX
Built 1962 Load: 24.5 t ADT: 410
CARVEL LN
FairOver: SHARPSTOWN DITCH
0.05 MI E OF LACY HILL, Harris, TX
Built 1970 Load: 24.5 t ADT: 1,100
CAVALCADE ST WB
FairOver: HUNTING BAYOU
0.35 MI E OF US 59, Harris, TX
Built 1967 Load: 24.5 t ADT: 5,010
CAVALCADE ST EB
FairOver: HUNTING BAYOU
0.35 MI E OF US 59, Harris, TX
Built 1967 Load: 24.5 t ADT: 5,010
CHEEVES ST
FairOver: HCFCD DITCH
0.6 MI N OF LITTLE YORK, Harris, TX
Built 1975 Load: 24.5 t ADT: 2,000
CHIMNEY ROCK SB
FairOver: SPRING BRANCH
0.10 MI S OF IH 10, Harris, TX
Built 1965 Load: 24.5 t ADT: 8,000
CHIMNEY ROCK RD NB
FairOver: WILLOW WATERHOLE BAYOU
0.55 MI SW OF W BELLFORT, Harris, TX
Built 1960 Load: 24.5 t ADT: 7,365
CHIMNEY ROCK RD SB
FairOver: WILLOW WATERHOLE BAYOU
0.55 MI SW OF W BELLFORT, Harris, TX
Built 1960 Load: 24.5 t ADT: 7,365
CLARBLAK LN
FairOver: BRICKHOUSE GULLY
0.05 MI S OF CLAY, Harris, TX
Built 1970 Load: 24.5 t ADT: 1,000
CLAY RD EB
FairOver: HCFCD DITCH
1.20 MI W OF SH 6, Harris, TX
Built 1988 Load: 24.5 t ADT: 5,000
CLAY RD
FairOver: TRIB OF TURKEY CR
0.30 MI W OF BRITTMOORE, Harris, TX
Built 1989 Load: 24.5 t ADT: 8,810
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.