St. Louis County, MO

912 public highway bridges

St. Louis County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, St. Louis County, Missouri contains 912 public highway bridges. Roughly 21.5% are rated “Good,” 42.2% “Fair,” and 3.9% “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.

912

Total Bridges

21.5%

Good

42.2%

Fair

3.9%

Poor Condition

Condition Distribution

Good

21.5% (196)

Fair

42.2% (385)

Poor

3.9% (36)

All Bridges (912)

Sort:

IS 44 E

Over: CST YARNELL RD

S 14 T 44 N R 5 E, St. Louis, MO

Built 2018 ADT: 9,738

MO 366 E

Over: RP IS270E TO IS44E

S 14 T 44 N R 5 E, St. Louis, MO

Built 2018 ADT: 15,559

MO 366 W

Over: RP IS270E TO IS44E

S 14 T 44 N R 5 E, St. Louis, MO

Built 2018 ADT: 15,559

CLAYTON RD E

Over: IS 270

S 22 T 45 N R 5 E, St. Louis, MO

Built 1985 ADT: 98,949

DORSETT RD E

Over: US 67

S 24 T 46 N R 5 E, St. Louis, MO

Built 2019 ADT: 9,889

ELIZABETH AVE S

Over: IS 270

S 31 T 47 N R 7 E, St. Louis, MO

Built 2020 ADT: 63,133

CO SOR270E TO NOR2

Over: IS 270

S 31 T 47 N R 7 E, St. Louis, MO

Built 2020 ADT: 61,856

US 67 N

Over: OR 270

S 33 T 47 N R 6 W, St. Louis, MO

Built 2020 ADT: 3,846

US 67 N

Over: IS 270

S 33 T 47 N R 6 E, St. Louis, MO

Built 2020 ADT: 53,874

OR 270 E

Over: IS 270

S 32 T 47 N R 7 E, St. Louis, MO

Built 2020 ADT: 47,337

US 67 S

Over: IS 270

S 33 T 47 N R 6 E, St. Louis, MO

Built 2020 ADT: 66,676

WEST FLORISSANT AV

Over: IS 270

S 31 T 47 N R 7 E, St. Louis, MO

Built 2020 ADT: 56,335

IS 55 S

Over: CRD REAVIS BARRACKS RD

S 23 T 44 N R 7 E, St. Louis, MO

Built 1962 ADT: 24,517

IS 55 S

Over: CRD BAYLESS AVE

S 18 T 44 N R 7 E, St. Louis, MO

Built 1962 ADT: 11,683

BIG BEND RD E

Over: IS 44

S 7 T 44 N R 6 E, St. Louis, MO

Built 2022 ADT: 43,460

IS 270 E

Over: RT N

S 35 T 47 N R 6 E, St. Louis, MO

Built 2022 ADT: 16,977

IS 270 W

Over: RT AC

S 31 T 47 N R 7 W, St. Louis, MO

Built 2022 ADT: 19,279

IS 270 E

Over: RT AC

S 31 T 47 N R 7 E, St. Louis, MO

Built 2022 ADT: 15,413

RP IS270E TO MO367

Over: MO 367

S 33 T 47 N R 7 E, St. Louis, MO

Built 2022 ADT: 8,801

RP IS270E TO MO367

Over: IS 270

S 33 T 47 N R 7 E, St. Louis, MO

Built 2022 ADT: 39,031

US 67 S

Over: CST LYNN HAVEN LN

S 939 T 47 N R 6 E, St. Louis, MO

Built 1989 ADT: 2,924

RP IS64E TO IS270E

Over: CST CONWAY RD

S 15 T 45 N R 5 E, St. Louis, MO

Built 2023 ADT: 6,789

IS 270 E

Over: CST CONWAY RD

S 15 T 45 N R 5 E, St. Louis, MO

Built 2023 ADT: 2,844

IS 270 W

Over: CST CONWAY RD

S 15 T 45 N R 5 E, St. Louis, MO

Built 2023 ADT: 6,789

MO 367 N

Over: US 67

S 16 T 47 N R 7 E, St. Louis, MO

Built 1988 ADT: 14,257

MO 370 W

Over: CST MAIN ST

S 32 T 47 N R 5 E, St. Louis, MO

Built 1993 ADT: 234

IS 64 E

Over: RT JJ

S 15 T 45 N R 5 E, St. Louis, MO

Built 1991 ADT: 18,444

IS 64 W

Over: RT JJ

S 15 T 45 N R 5 E, St. Louis, MO

Built 1991 ADT: 18,444

RP IS270E TO IS64E

Over: RT JJ

S 15 T 45 N R 5 E, St. Louis, MO

Built 1990 ADT: 18,444

IS 64 W

Over: IS 270

S 15 T 45 N R 5 E, St. Louis, MO

Built 1988 ADT: 97,404

RP IS64W TO IS270W

Over: RP IS270W TO IS64E

S 15 T 45 N R 5 E, St. Louis, MO

Built 1988 ADT: 21,946

IS 64 E

Over: IS 270

S 15 T 45 N R 5 E, St. Louis, MO

Built 1988 ADT: 98,949

RP IS64E TO IS270E

Over: RP IS270E TO IS64W

S 15 T 45 N R 5 E, St. Louis, MO

Built 1988 ADT: 18,296

RP IS64E TO RTJJ S

Over: RP IS270E TO IS64E

S 15 T 45 N R 5 E, St. Louis, MO

Built 1991 ADT: 14,766

IS 270 E

Over: RP IS270W TO IS64E

S 15 T 45 N R 5 E, St. Louis, MO

Built 1993 ADT: 21,946

MO 340 E

Over: CST CHESTERFIELD PKWY EA

S 2002 T 45 N R 4 E, St. Louis, MO

Built 1990 ADT: 11,574

MO 340 W

Over: CST CHESTERFIELD PKWY EA

S 2002 T 45 N R 4 E, St. Louis, MO

Built 1990 ADT: 11,574

CHESTERFIELD PKWY

Over: IS 64

S 10 T 45 N R 4 E, St. Louis, MO

Built 1990 ADT: 69,731

TIMBERLAKE MANOR D

Over: IS 64

S 11 T 45 N R 4 E, St. Louis, MO

Built 1990 ADT: 69,731

S WOODS MILL RD S

Over: IS 64

S 13 T 45 N R 4 E, St. Louis, MO

Built 1988 ADT: 69,731

THEISS RD S

Over: IS 270

S 1988 T 44 N R 6 E, St. Louis, MO

Built 1993 ADT: 77,318

JJ KELLEY MEMORIAL

Over: IS 270

S 27 T 45 N R 5 E, St. Louis, MO

Built 1989 ADT: 98,949

RP IS270W TO IS55N

Over: CRD VON TALGE RD

S 33 T 44 N R 6 E, St. Louis, MO

Built 1993 ADT: 3,107

RP IS55N TO IS270E

Over: CRD VON TALGE RD

S 33 T 44 N R 6 E, St. Louis, MO

Built 1993 ADT: 3,107

RP IS55N TO IS270E

Over: IS 255

S 34 T 44 N R 6 E, St. Louis, MO

Built 1991 ADT: 35,885

RP IS55S TO IS255S

Over: RP IS270W TO IS55N

S 34 T 44 N R 6 E, St. Louis, MO

Built 1991 ADT: 13,579

MO 370 E

Over: RP IS270E TO MO370W

S 2038 T 47 N R 5 E, St. Louis, MO

Built 1991 ADT: 6,769

MO 370 E

Over: CST MISSOURI BOTTOM RD

S 2038 T 47 N R 5 E, St. Louis, MO

Built 1990 ADT: 13,069

MO 370 E

Over: CST FERGUSON LN

S 2038 T 47 N R 5 E, St. Louis, MO

Built 1990 ADT: 400

MO 370 W

Over: CST FERGUSON LN

S 2038 T 47 N R 5 E, St. Louis, MO

Built 1990 ADT: 400

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

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Every figure on PlainBridge 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.