St. Louis County, MO

912 public highway bridges

St. Louis County Bridge Snapshot

St. Louis County, Missouri contains 912 public highway bridges in the FHWA National Bridge Inventory. Roughly 21.5% are rated “Good,” 42.2% “Fair,” 3.9% “Poor,” and 3.9% 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 MO 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.

912

Total Bridges

21.5%

Good

3.9%

Poor

3.9%

Structurally Deficient

Condition Distribution

Good

21.5% (196)

Fair

42.2% (385)

Poor

3.9% (36)

SD

3.9% (36)

All Bridges (912)

Sort:

YAEGER RD

Over: MATTESE CR

S 10 T 43 N R 6 E, St. Louis, MO

Built 1957 Load: 43.2 t ADT: 2,736

OSSENFORT RD

Over: BR OF WILD HORSE C

S 957 T 45 N R 3 E, St. Louis, MO

Built 1991 Load: 43.2 t ADT: 690

VON TALGE MEADOWS

Over: BR OF MATTESE CR

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

Built 2000 Load: 43.2 t ADT: 240

DADE AVE

Over: NS RR

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

Built 1955 Load: 43.2 t ADT: 1,820

RT D E

Over: SERVICE RD, ST. LOUIS

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

Built 2006 Load: 43.2 t ADT: 14,240

IS 55 S

Over: MATTESE CR

S 4 T 43 N R 6 E, St. Louis, MO

Built 1964 Load: 43.2 t ADT: 153,270

MO 100 E

Over: GRAND GLAIZE CR

S 36 T 45 N R 4 E, St. Louis, MO

Built 1921 Load: 43.2 t ADT: 47,536

IS 270 E

Over: WATKINS CR

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

Built 1931 Load: 43.2 t ADT: 78,714

IS 270 E

Over: WATKINS CR

S 114 T 47 N R 7 E, St. Louis, MO

Built 1931 Load: 43.2 t ADT: 49,213

IS 44 E

Over: WILLIAMS CR

S 880 T 44 N R 5 E, St. Louis, MO

Built 1958 Load: 43.2 t ADT: 78,184

IS 70 E

Over: MALINE CR

S 15 T 46 N R 6 E, St. Louis, MO

Built 1958 Load: 43.2 t ADT: 117,378

IS 270 E

Over: SUGAR CR

S 3 T 44 N R 5 E, St. Louis, MO

Built 1962 Load: 43.2 t ADT: 211,152

RT D E

Over: FEE FEE CR

S 357 T 46 N R 5 E, St. Louis, MO

Built 1966 Load: 44.1 t ADT: 32,720

WILD HORSE CR RD

Over: BATES CR

S 1956 T 45 N R 3 E, St. Louis, MO

Built 2013 Load: 44.1 t ADT: 1,018

RT D E

Over: UP RR

S 34 T 46 N R 6 E, St. Louis, MO

Built 1983 Load: 44.1 t ADT: 13,500

LP 44 E

Over: CLEAR CR

S 1946 T 43 N R 3 E, St. Louis, MO

Built 1932 Load: 44.1 t ADT: 6,940

IS 270 E

Over: BNSF RR

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

Built 1958 Load: 44.1 t ADT: 29,389

BERMUDA DR

Over: MALINE CR

S 12 T 46 N R 6 E, St. Louis, MO

Built 1961 Load: 45.0 t ADT: 6,782

FEE FEE RD

Over: CREVE COEUR CR TRI

S 32 T 46 N R 5 E, St. Louis, MO

Built 1981 Load: 45.0 t ADT: 25,920

KEMPLAND PLACE

Over: RVR DES PERES

S 2914 T 46 N R 6 E, St. Louis, MO

Built 1950 Load: 45.0 t ADT: 2,100

US 50 E

Over: RP IS55S TO IS255S

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

Built 1995 Load: 45.0 t ADT: 30,976

CHAMBERS RD

Over: BLACK JACK CR

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

Built 1958 Load: 45.9 t ADT: 16,749

FERGUSON AVE

Over: TRRA RR

S 35 T 46 N R 6 E, St. Louis, MO

Built 1980 Load: 45.9 t ADT: 2,055

ANDREWS DR

Over: BR OF DEER CR

S 30 T 45 N R 6 E, St. Louis, MO

Built 1977 Load: 45.9 t ADT: 1,000

IS 170 W

Over: RP FROST AVE TO IS170E

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

Built 1978 Load: 45.9 t ADT: 27,257

OLD HWY 141

Over: FENTON CR

S 35 T 44 N R 5 E, St. Louis, MO

Built 2011 Load: 45.9 t ADT: 10,608

IS 64 E

Over: CREVE COEUR CR

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

Built 1988 Load: 45.9 t ADT: 69,731

IS 64 W

Over: CREVE COEUR CR

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

Built 1988 Load: 45.9 t ADT: 69,731

RP IS170W TO MO115

Over: MALINE CR

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

Built 1979 Load: 46.8 t ADT: 5,955

MO 370 E

Over: NS RR

S 36 T 47 N R 5 E, St. Louis, MO

Built 1991 Load: 46.8 t ADT: 17,833

MO 370 W

Over: NS RR

S 2039 T 47 N R 5 E, St. Louis, MO

Built 1990 Load: 47.7 t ADT: 16,512

N W ENTRY DR

Over: GRAND GLAIZE CR

S 36 T 45 N R 4 E, St. Louis, MO

Built 2005 Load: 47.7 t ADT: 2,000

FEE FEE RD

Over: FEE FEE CR

S 22 T 46 N R 5 E, St. Louis, MO

Built 1970 Load: 48.6 t ADT: 11,800

IS 55 S

Over: AFTON DRAIN DTCH

S 24 T 44 N R 6 E, St. Louis, MO

Built 1962 Load: 48.6 t ADT: 112,163

MAY VALLEY DR

Over: FENTON CR

S 28 T 44 N R 5 E, St. Louis, MO

Built 1994 Load: 49.5 t ADT: 1,023

MO 367 S

Over: MALINE CR

S 9 T 46 N R 7 E, St. Louis, MO

Built 2005 Load: 49.5 t ADT: 18,963

OLD SMIZER MILL RD

Over: FENTON CR

S 34 T 44 N R 5 E, St. Louis, MO

Built 2000 Load: 49.5 t ADT: 3,000

LEFFINGWELL AVE

Over: GRAVOIS CRK

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

Built 1973 Load: 49.5 t ADT: 2,000

US 50 E

Over: RP IS255N TO IS55N

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

Built 1995 Load: 50.4 t ADT: 29,869

GREEN VALLEY DR

Over: DELLWOOD CR

S 6 T 46 N R 7 E, St. Louis, MO

Built 1950 Load: 50.4 t ADT: 2,831

MCKELVEY RD S

Over: JAMES CR

S 2 T 46 N R 5 E, St. Louis, MO

Built 1968 Load: 50.4 t ADT: 12,193

RT BA S

Over: BONHOMME CR

S 163 T 45 N R 3 E, St. Louis, MO

Built 1993 Load: 50.4 t ADT: 1,654

ST PAUL RD

Over: SPRING BR

S 9 T 44 N R 4 E, St. Louis, MO

Built 1965 Load: 51.3 t ADT: 840

HILLSBORO RD

Over: E TRIB OF WILLIAMS

S 30 T 44 N R 5 E, St. Louis, MO

Built 2007 Load: 51.3 t ADT: 5,816

MO 141 S

Over: FEE FEE CR

S 18 T 46 N R 5 E, St. Louis, MO

Built 2003 Load: 51.3 t ADT: 8,981

MO 141 N

Over: FEE FEE CR

S 18 T 46 N R 5 E, St. Louis, MO

Built 2003 Load: 51.3 t ADT: 8,981

IS 44 W

Over: WILLIAMS CR

S 24 T 44 N R 4 E, St. Louis, MO

Built 1958 Load: 51.3 t ADT: 40,274

IS 270 E

Over: FEE FEE CR BR

S 69 T 46 N R 5 E, St. Louis, MO

Built 1965 Load: 52.2 t ADT: 138,910

BIG BEND RD E

Over: GRAVOIS CR

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

Built 1967 Load: 52.2 t ADT: 21,011

IS 44 E

Over: BR GRAVOIS CR

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

Built 1967 Load: 52.2 t ADT: 108,141

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