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:

MO 30 E

Over: CST WATER ST

S 373 T 44 N R 5 E, St. Louis, MO

Built 1968 ADT: 973

BIG BEND BLVD E

Over: IS 44

S 5 T 44 N R 6 E, St. Louis, MO

Built 1969 ADT: 51,725

BIG BEND BLVD W

Over: IS 44

S 5 T 44 N R 6 E, St. Louis, MO

Built 1969 ADT: 51,725

SPIRIT OF ST LOUIS

Over: IS 64

S 371 T 45 N R 3 E, St. Louis, MO

Built 1968 ADT: 37,898

RP IS64W TO LONG R

Over: IS 64

S 126 T 45 N R 4 E, St. Louis, MO

Built 1968 ADT: 50,214

LILAC AVE S

Over: IS 270

S 35 T 47 N R 7 E, St. Louis, MO

Built 1961 ADT: 24,158

MO 30 E

Over: MO 141

S 373 T 44 N R 5 E, St. Louis, MO

Built 1970 ADT: 25,106

MO 30 W

Over: MO 141

S 373 T 44 N R 5 E, St. Louis, MO

Built 1970 ADT: 19,677

IS 270 E

Over: CRD BELLEFONTAINE RD

S 34 T 47 N R 7 E, St. Louis, MO

Built 1961 ADT: 13,738

IS 270 W

Over: CRD BELLEFONTAINE RD

S 34 T 47 N R 7 E, St. Louis, MO

Built 1961 ADT: 12,603

IS 255 S

Over: CRD KOCH RD

S 3119 T 43 N R 7 E, St. Louis, MO

Built 1977 ADT: 4,433

IS 255 N

Over: CRD KOCH RD

S 3119 T 43 N R 7 E, St. Louis, MO

Built 1977 ADT: 2,682

MO 109 S

Over: MO 100

S 2 T 44 N R 3 E, St. Louis, MO

Built 1974 ADT: 7,076

IS 170 E

Over: CST GALLERIA PKWY

S 16 T 45 N R 6 E, St. Louis, MO

Built 1968 ADT: 4,595

IS 170 W

Over: CST GALLERIA PKWY

S 16 T 45 N R 6 E, St. Louis, MO

Built 1968 ADT: 4,595

IS 170 E

Over: CST CLAYTON RD

S 16 T 45 N R 6 E, St. Louis, MO

Built 1968 ADT: 14,049

IS 170 W

Over: CST CLAYTON RD

S 16 T 45 N R 6 E, St. Louis, MO

Built 1968 ADT: 14,001

IS 170 E

Over: CST S BRENTWOOD BLVD

S 16 T 45 N R 6 E, St. Louis, MO

Built 1968 ADT: 11,370

IS 170 W

Over: CST S BRENTWOOD BLVD

S 16 T 45 N R 6 E, St. Louis, MO

Built 1968 ADT: 11,370

IS 170 E

Over: CST FOREST PARK PKWY

S 2496 T 45 N R 6 E, St. Louis, MO

Built 1968 ADT: 7,717

IS 170 E

Over: CST LADUE RD

S 2496 T 45 N R 6 E, St. Louis, MO

Built 1968 ADT: 9,502

OLD BONHOMME RD E

Over: IS 170

S 5 T 45 N R 6 E, St. Louis, MO

Built 1960 ADT: 50,717

IS 170 E

Over: CST WOODSON RD

S 32 T 46 N R 6 E, St. Louis, MO

Built 1968 ADT: 6,767

IS 170 E

Over: CST NYFLOT AVE

S 2979 T 47 N R 6 E, St. Louis, MO

Built 1978 ADT: 176

IS 170 W

Over: CST NYFLOT AVE

S 2979 T 47 N R 6 E, St. Louis, MO

Built 1978 ADT: 176

IS 170 E

Over: RP BOEING RD TO IS170E

S 2979 T 46 N R 6 E, St. Louis, MO

Built 1980 ADT: 404

IS 170 E

Over: CST FROST AVE

S 2 T 46 N R 6 E, St. Louis, MO

Built 1978 ADT: 2,572

IS 170 W

Over: CST FROST AVE

S 2 T 46 N R 6 E, St. Louis, MO

Built 1978 ADT: 2,572

IS 170 E

Over: CST AIRPORT RD

S 2979 T 46 N R 6 E, St. Louis, MO

Built 1980 ADT: 18,079

IS 170 W

Over: CST AIRPORT RD

S 2979 T 46 N R 6 E, St. Louis, MO

Built 1980 ADT: 18,079

SCUDDER AVE E

Over: IS 170

S 10 T 46 N R 6 E, St. Louis, MO

Built 1977 ADT: 51,972

RP IS170W TO IS70W

Over: IS 170

S 656 T 46 N R 6 E, St. Louis, MO

Built 1981 ADT: 51,136

RP IS70E TO IS170W

Over: RP IS170W TO IS70W

S 656 T 46 N R 6 E, St. Louis, MO

Built 1981 ADT: 2,160

IS 70 W

Over: RP IS170E TO IS70E

S 656 T 46 N R 6 E, St. Louis, MO

Built 1979 ADT: 15,014

RP IS170W TO IS70W

Over: IS 170

S 656 T 46 N R 6 E, St. Louis, MO

Built 1981 ADT: 50,071

RP IS70E TO IS170W

Over: RP IS170E TO IS70E

S 656 T 46 N R 6 E, St. Louis, MO

Built 1981 ADT: 15,014

IS 70 E

Over: IS 170

S 656 T 46 N R 6 E, St. Louis, MO

Built 1979 ADT: 50,071

IS 70 E

Over: RP IS170W TO IS70W

S 656 T 46 N R 6 E, St. Louis, MO

Built 1979 ADT: 11,038

RP IS170E TO IS70E

Over: IS 170

S 656 T 46 N R 6 E, St. Louis, MO

Built 1981 ADT: 54,851

RP IS70W TO IS170E

Over: RP IS170W TO IS70W

S 656 T 46 N R 6 E, St. Louis, MO

Built 1981 ADT: 11,038

IS 70 W

Over: IS 170

S 656 T 46 N R 6 E, St. Louis, MO

Built 1979 ADT: 54,851

IS 170 E

Over: MO 115

S 48 T 46 N R 6 E, St. Louis, MO

Built 1979 ADT: 6,214

IS 170 W

Over: MO 115

S 48 T 46 N R 6 E, St. Louis, MO

Built 1979 ADT: 4,525

MO 366 E

Over: US 50

S 13 T 44 N R 5 E, St. Louis, MO

Built 1983 ADT: 21,140

IS 170 W

Over: RP IS170W TO MO180W

S 21 T 46 N R 6 E, St. Louis, MO

Built 1981 ADT: 4,460

IS 170 E

Over: RP IS170E TO MO180E

S 21 T 46 N R 6 E, St. Louis, MO

Built 1981 ADT: 9,625

MIDLAND BLVD E

Over: IS 170

S 28 T 46 N R 6 E, St. Louis, MO

Built 1981 ADT: 46,446

IS 170 E

Over: RT D

S 33 T 46 N R 6 E, St. Louis, MO

Built 1980 ADT: 12,249

IS 70 E

Over: MO 141

S 4 T 46 N R 5 E, St. Louis, MO

Built 1971 ADT: 3,360

MO 367 S

Over: CST CHAMBERS RD

S 4 T 46 N R 7 E, St. Louis, MO

Built 2002 ADT: 12,370

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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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.