Harris County, TX

4,030 public highway bridges

Harris County Bridge Snapshot

Harris County, Texas contains 4,030 public highway bridges in the FHWA National Bridge Inventory. Roughly 31.2% are rated “Good,” 31.4% “Fair,” 0.4% “Poor,” and 0.4% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in TX are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

4,030

Total Bridges

31.2%

Good

0.4%

Poor

0.4%

Structurally Deficient

Condition Distribution

Good

31.2% (1,259)

Fair

31.4% (1,266)

Poor

0.4% (18)

SD

0.4% (18)

All Bridges (4,030)

Sort:

IH 610W

Over: WESTHEIMER RD

0.84 MI N OF US 59, Harris, TX

Built 2006 ADT: 35,000

IH 610W

Over: SAN FELIPE ST

1.28 MI N OF US 59, Harris, TX

Built 2006 ADT: 35,000

IH 610 SB OFF RAMP

Over: IH 610 SBFR & W ALABAMA

0.65 MI N OF US 59, Harris, TX

Built 2004 ADT: 25,490

IH 610 SB OFF-RAMP

Over: IH 610 SB ON-RAMP

1.00 MI N OF US 59, Harris, TX

Built 2004 ADT: 26,000

IH 610W NB ON-RAMP

Over: IH 610W NB OFF-RAMP

1.07 MI N OF US 59, Harris, TX

Built 2006 ADT: 35,000

IH 610 NB TO IH 10

Over: MEMORIAL DR

0.5 MI S OF IH 10, Harris, TX

Built 2006 ADT: 38,099

IH10 WB - IH610 NB

Over: IH10 WB EX & OLD KATY EB

0.25 MI N OF IH 610, Harris, TX

Built 2006 ADT: 36,201

IH 610

Over: POST OAK BLVD

1.8 MI S OF IH 10, Harris, TX

Built 2006 ADT: 18,500

IH 610

Over: WOODWAY DR

1.0 MI S OF IH 10, Harris, TX

Built 2006 ADT: 41,138

WOODWAY EXIT RAMP

Over: MEMORIAL DR

0.5 MI S OF IH 10, Harris, TX

Built 2006 ADT: 5,000

IH 610 NB ON RAMP

Over: MEMORIAL DR

0.5 MI S OF IH 10, Harris, TX

Built 2006 ADT: 38,099

IH 610 ML

Over: MEMORIAL DR

0.5 MI S OF IH 10, Harris, TX

Built 2006 ADT: 38,099

IH 610 NB ENT RAMP

Over: CONN D & I

0.5 MI S OF IH10, Harris, TX

Built 2006 ADT: 55,099

IH 610 NB

Over: IH 10 & OLD KATY RD

0.00 MI N OF IH 10, Harris, TX

Built 2005 ADT: 309,900

IH 610 SB

Over: IH 10 & OLD KATY RD

0.00 MI N OF IH 10, Harris, TX

Built 2005 ADT: 309,900

IH 610 SB TO IH 10

Over: OLD KATY ROAD

IH610/IH10 INTERCHANGE, Harris, TX

Built 2006 ADT: 10,000

IH69 NB / IH610 SB

Over: IH610 DC-F

IH610 / IH69 INTERCHANGE, Harris, TX

Built 2020 ADT: 10,649

IH610 Bus Lane

Over: IH 610 Bus Lane

0.02 Mi N of Westpark Dr, Harris, TX

Built 2020 ADT: 40,909

IH610 SB / IH69 NB

Over: IH610 DC-A

IH610 / IH69 INTERCHANGE, Harris, TX

Built 2020 ADT: 148,671

IH 610 Bus Lane

Over: IH610 SBML, SBFR, Etc.

0.01 MI North of Post Oak, Harris, TX

Built 2021 ADT: 110,512

SH 134 INDEPENDNCE

Over: SH 225 ML & WBFR

3.7 MI E OF BW 8, Harris, TX

Built 1990 ADT: 80,040

SH 146

Over: SH 146 BUS

2.70 MI E OF SPUR 330, Harris, TX

Built 1988 ADT: 32,680

SH 146 NB

Over: UP RR & PORT ROAD

2.80 MI N OF NASA RD 1, Harris, TX

Built 1969 ADT: 5,530

SH 146

Over: CLEAR CRK & SHIPYARD DR

0.80 MI N OF FM 518, Harris, TX

Built 1986 ADT: 2,000

SH 146

Over: FAIRMONT PARKWAY

2.50 MI S OF SH 225, Harris, TX

Built 1987 ADT: 37,360

SH 146 SB

Over: UP RR & PORT ROAD

2.80 MI N OF NASA RD 1, Harris, TX

Built 1969 ADT: 5,530

SH 146 NB

Over: SPENCER HWY

1.60 MI S OF SH 225, Harris, TX

Built 2000 ADT: 9,000

SH 146 SB

Over: SPENCER HWY

1.60 MI S OF SH 225, Harris, TX

Built 2001 ADT: 9,000

SH 146

Over: CHOATE RD & SHOREACRES B

2.27 MI S OF FAIRMONT PKW, Harris, TX

Built 2012 ADT: 15,000

SH 146

Over: RED BLUFF RD

1.77 MI N OF NASA RD 1, Harris, TX

Built 2012 ADT: 29,170

SH 146

Over: WHARTON WEEMS (SP 498)

1.05 MI S OF FAIRMONT PKW, Harris, TX

Built 2012 ADT: 2,600

SH 146 SB CONN

Over: PORT RD & SH 146

3.0 MI N OF NASA RD 1, Harris, TX

Built 2012 ADT: 29,790

SH146 NB CONNECTOR

Over: UP RAILROAD, FRTG RDS

5.8 MI S OF SH 225, Harris, TX

Built 2016 ADT: 40,000

SH 146 SB

Over: HOUSTON SHIP CHANNEL

0.6 MI N OF SH 225, Harris, TX

SH 146 SB

Over: BARBOURS CUT BLVD

1.4 MI N OF FAIRMONT PKWY, Harris, TX

Built 1996 ADT: 3,000

SH 146 NB

Over: BARBOURS CUT BLVD

1.4 MI N OF FAIRMONT PKWY, Harris, TX

Built 1996 ADT: 3,000

SH146SB TOSH 225WB

Over: STRANG ROAD

SH146/SH225 INTERCHANGE, Harris, TX

Built 1998 ADT: 3,000

SH146NB to SH225WB

Over: SH 146/225EBto146NB/UPRR

SH 146/SH 225 INTERCHANGE, Harris, TX

Built 2000 ADT: 50,000

SH 146 SB ML

Over: HCFCD DRAIN & UP RR

SH146/SH225 INTERCHANGE, Harris, TX

Built 1998 ADT: 22,190

SH 146 NB ML

Over: HCFCD DRAIN & UP RR

SH 146/SH 225 INTERCHANGE, Harris, TX

Built 2000 ADT: 22,190

SH 225 EB/SH 146SB

Over: SH 225 EB FR & STRANG RD

SH146/SH225 INTERCHANGE, Harris, TX

Built 1998 ADT: 1,210

SH 146 NB

Over: WEST MAIN STREET

0.85 MI NE OF SH 146 BUS, Harris, TX

Built 1971 ADT: 3,000

SH 146 NB

Over: UPRR;MARKET & LEFEVRE ST

1.4 MI N OF BU 146, Harris, TX

Built 1971 ADT: 3,000

SH 146 SB

Over: WEST MAIN STREET

0.85 MI NE OF SH 146 BUS, Harris, TX

Built 1971 ADT: 3,000

SH 146 SB

Over: UPRR;MARKET & LEFEVRE ST

1.4 MI N OF BU 146, Harris, TX

Built 1971 ADT: 3,000

SH 146

Over: MISSOURI ST

0.30 MI NE OF SH 146 BUS, Harris, TX

Built 1996 ADT: 4,640

SH 146

Over: W TEXAS AVE

0.50 MI SW OF SPUR 330, Harris, TX

Built 1996 ADT: 3,000

SH99 SB / SH146 SB

Over: SH 146 ML

AT BU 146 & SH 146 INTER., Harris, TX

Built 1996 ADT: 46,390

SH 146

Over: GOOSE CREEK & GARTH RD

0.40 MI E OF SPUR 330, Harris, TX

Built 1996 ADT: 5,000

SH 146

Over: NORTH MAIN ST

1.45 MI E OF SPUR 330, Harris, TX

Built 1996 ADT: 5,000

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026