St. Charles County, MO

418 public highway bridges

St. Charles County Bridge Snapshot

St. Charles County, Missouri contains 418 public highway bridges in the FHWA National Bridge Inventory. Roughly 21.8% are rated “Good,” 51.7% “Fair,” 3.1% “Poor,” and 3.1% 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.

418

Total Bridges

21.8%

Good

3.1%

Poor

3.1%

Structurally Deficient

Condition Distribution

Good

21.8% (91)

Fair

51.7% (216)

Poor

3.1% (13)

SD

3.1% (13)

All Bridges (418)

Sort:

MO 94 E

Over: CRD KISKER RD

S 18 T 46 N R 4 E, St. Charles, MO

Built 2012 ADT: 9,078

SALT RIVER RD

Over: SPENCER RD

S 1786 T 47 N R 4 E, St. Charles, MO

Built 2011 ADT: 5,000

GUTERMUTH RD E

Over: MO 364

S 57 T 46 N R 3 E, St. Charles, MO

Built 2013 ADT: 24,602

RT N E

Over: MO 364

S 1 T 46 N R 2 E, St. Charles, MO

Built 2013 ADT: 24,602

MO 364 E

Over: CST HANLEY RD

S 1 T 46 N R 2 E, St. Charles, MO

Built 2013 ADT: 2,164

MO 364 W

Over: CST HANLEY RD

S 1 T 46 N R 2 E, St. Charles, MO

Built 2013 ADT: 2,164

MO 364 W

Over: RT K

S 3225 T 46 N R 3 E, St. Charles, MO

Built 2013 ADT: 29,352

MO 364 E

Over: RT K

S 3225 T 46 N R 3 E, St. Charles, MO

Built 2013 ADT: 29,352

MO 364 E

Over: CST HENKE RD

S 1 T 46 N R 2 E, St. Charles, MO

Built 2013 ADT: 10,182

MO 364 W

Over: CST HENKE RD

S 1 T 46 N R 2 E, St. Charles, MO

Built 2013 ADT: 10,182

MO 364 W

Over: CRD MOTHERHEAD RD

S 948 T 46 N R 3 E, St. Charles, MO

Built 2014 ADT: 5,232

MO 364 E

Over: CRD MOTHERHEAD RD

S 948 T 46 N R 3 E, St. Charles, MO

Built 2014 ADT: 5,232

MO 94 W

Over: MO 364

S 292 T 46 N R 3 E, St. Charles, MO

Built 2014 ADT: 24,602

RT A E

Over: CST E PITMAN AVE

S 888 T 47 N R 2 E, St. Charles, MO

Built 1982 ADT: 2,109

IS 70 E

Over: RT A

S 888 T 47 N R 2 E, St. Charles, MO

Built 1983 ADT: 12,818

IS 70 W

Over: RT A

S 888 T 47 N R 2 E, St. Charles, MO

Built 1982 ADT: 12,818

MID RIVERS MALL DR

Over: IS 70

S 762 T 47 N R 4 E, St. Charles, MO

Built 1983 ADT: 65,971

MID RIVERS MALL DR

Over: IS 70

S 762 T 47 N R 4 E, St. Charles, MO

Built 1983 ADT: 65,971

MO 79 N

Over: OR 70

S 731 T 47 N R 3 E, St. Charles, MO

Built 1985 ADT: 3,088

MO 79 S

Over: IS 70

S 731 T 47 N R 3 E, St. Charles, MO

Built 1985 ADT: 52,361

CONVENTION CENTER

Over: IS 70

S 3280 T 46 N R 5 E, St. Charles, MO

Built 2016 ADT: 74,551

IS 70 E

Over: RT Z

S 25 T 47 N R 1 E, St. Charles, MO

Built 1985 ADT: 25,549

IS 70 W

Over: RT Z

S 25 T 47 N R 1 E, St. Charles, MO

Built 1985 ADT: 25,549

PEINE RD N

Over: US 61

S 413 T 47 N R 1 E, St. Charles, MO

Built 2018 ADT: 25,335

CAVE SPRINGS RD S

Over: IS 70

S 97 T 47 N R 4 E, St. Charles, MO

Built 2022 ADT: 52,161

CAVE SPRINGS RD S

Over: OR 70

S 979 T 47 N R 4 E, St. Charles, MO

Built 2022 ADT: 11,193

ZUMBEHL RD S

Over: IS 70

S 3280 T 47 N R 4 E, St. Charles, MO

Built 2022 ADT: 59,466

MO 370 E

Over: CST MAIN ST

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

Built 1992 ADT: 234

SALT RIVER RD E

Over: MO 79

S 23 T 47 N R 3 E, St. Charles, MO

Built 1990 ADT: 10,829

MO 370 E

Over: MO 94

S 161 T 47 N R 5 E, St. Charles, MO

Built 1991 ADT: 10,027

BRYAN RD S

Over: IS 70

S 30 T 47 N R 2 E, St. Charles, MO

Built 1991 ADT: 45,172

IS 70 E

Over: MO 370

S 29 T 47 N R 4 E, St. Charles, MO

Built 1993 ADT: 15,048

IS 70 W

Over: MO 370

S 29 T 47 N R 4 E, St. Charles, MO

Built 1993 ADT: 15,048

OR 70 E

Over: RP IS70W TO MO370E

S 29 T 47 N R 4 E, St. Charles, MO

Built 1995 ADT: 265

MO 370 W

Over: MO 94

S 161 T 47 N R 5 E, St. Charles, MO

Built 1991 ADT: 10,027

MO 370 E

Over: CST ELM ST

S 13 T 47 N R 4 E, St. Charles, MO

Built 1994 ADT: 12,318

MO 370 E

Over: CRD ELM POINT IND DR

S 27 T 47 N R 5 E, St. Charles, MO

Built 1994 ADT: 9,308

SALT RIVER RD E

Over: MO 370

S 1786 T 47 N R 4 E, St. Charles, MO

Built 1995 ADT: 14,686

MO 370 W

Over: CST LAKESIDE PARK DR

S 1786 T 47 N R 4 E, St. Charles, MO

Built 1995 ADT: 2,000

MO 370 W

Over: CST ELM ST

S 13 T 47 N R 4 E, St. Charles, MO

Built 1994 ADT: 10,018

MO 370 W

Over: CRD ELM POINT IND DR

S 27 T 47 N R 5 E, St. Charles, MO

Built 1994 ADT: 9,308

LAKE ST LOUIS BLVD

Over: IS 64

S 35 T 47 N R 2 E, St. Charles, MO

Built 1996 ADT: 37,401

MO 370 W

Over: CST PREMIER PKWY

S 735 T 47 N R 4 E, St. Charles, MO

Built 1995 ADT: 1,168

MO 370 E

Over: CST PREMIER PKWY

S 735 T 47 N R 4 E, St. Charles, MO

Built 1995 ADT: 1,168

IS 64 W

Over: IS 70

S 30 T 47 N R 2 E, St. Charles, MO

Built 1971 ADT: 41,021

US 61 S

Over: IS 70

S 30 T 47 N R 2 E, St. Charles, MO

Built 1971 ADT: 41,021

IS 70 E

Over: RT K

S 32 T 47 N R 3 E, St. Charles, MO

Built 1955 ADT: 41,086

RT W S

Over: IS 70

S 19 T 47 N R 1 E, St. Charles, MO

Built 1963 ADT: 31,436

NEW TOWN BLVD

Over: TRIB OF MISSISSIPP

S 13 T 47 N R 4 E, St. Charles, MO

Built 1998 Load: 15.3 t ADT: 10,000

MEXICO RD

Over: BR OF BELLEAU CR

S 33 T 47 N R 3 E, St. Charles, MO

Built 1990 Load: 16.2 t ADT: 14,000

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 5, 2026