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:

RP MO370W TO IS70E

Over: MO 370

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

Built 1994 ADT: 15,048

MO 370 E

Over: CST LAKESIDE PARK DR

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

Built 1995 ADT: 2,000

SPENCER RD S

Over: OR 70

S 1799 T 47 N R 4 E, St. Charles, MO

Built 1995 ADT: 9,547

RESEARCH PARK CIR

Over: IS 64

S 34 T 46 N R 3 E, St. Charles, MO

Built 1998 ADT: 45,018

HAWKS NEST DR E

Over: IS 70

S 3280 T 46 N R 4 E, St. Charles, MO

Built 1998 ADT: 58,791

RT DD N

Over: IS 64

S 13 T 46 N R 2 E, St. Charles, MO

Built 2000 ADT: 29,749

WOODLAWN AVE S

Over: IS 70

S 29 T 47 N R 3 E, St. Charles, MO

Built 1999 ADT: 51,860

HERITAGE CROSSING

Over: MO 94

S 10 T 46 N R 4 E, St. Charles, MO

Built 2000 ADT: 32,922

T R HUGHES BLVD S

Over: IS 70

S 27 T 47 N R 3 E, St. Charles, MO

Built 2000 ADT: 51,946

MO 94 E

Over: IS 64

S 28 T 46 N R 3 E, St. Charles, MO

Built 2000 ADT: 44,418

MO 94 E

Over: MO 364

S 11 T 46 N R 4 E, St. Charles, MO

Built 2000 ADT: 28,001

WENTZVILLE PKWY E

Over: IS 70

S 26 T 47 N R 1 E, St. Charles, MO

Built 2001 ADT: 44,192

MO 94 W

Over: RP MO364W TO NOR94W

S 1198 T 46 N R 4 E, St. Charles, MO

Built 2001 ADT: 3,561

MO 364 E

Over: CRD ARENA PKWY

S 119 T 46 N R 4 E, St. Charles, MO

Built 2001 ADT: 10,916

MO 364 W

Over: CRD ARENA PKWY

S 1198 T 46 N R 4 E, St. Charles, MO

Built 2001 ADT: 10,916

EXECUTIVE CENTRE P

Over: OR 70

S 28 T 47 N R 4 E, St. Charles, MO

Built 2000 ADT: 7,411

RP MO94W TO MO364E

Over: MO 364

S 1198 T 46 N R 4 E, St. Charles, MO

Built 2001 ADT: 28,001

MUEGGE RD N

Over: MO 94

S 1198 T 46 N R 4 E, St. Charles, MO

Built 2001 ADT: 34,659

RP MO94W TO MO364E

Over: MO 94

S 1198 T 46 N R 4 E, St. Charles, MO

Built 2001 ADT: 34,659

SONDEREN ST S

Over: IS 70

S 28 T 47 N R 3 E, St. Charles, MO

Built 2000 ADT: 52,361

US 61 S

Over: IS 64

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

Built 1971 ADT: 24,266

RP IS64E TO IS70E

Over: IS 64

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

Built 1971 ADT: 39,184

US 61 S

Over: CST PITMAN AVE

S 19 T 47 N R 2 E, St. Charles, MO

Built 1973 ADT: 2,750

US 61 N

Over: CST PEARCE BLVD

S 19 T 47 N R 2 E, St. Charles, MO

Built 1976 ADT: 8,712

RT A E

Over: US 61

S 24 T 47 N R 1 E, St. Charles, MO

Built 1973 ADT: 33,180

IS 70 E

Over: CST MAIN ST

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

Built 1978 ADT: 6,104

MO 94 E

Over: CRD JUNGS STATION RD

S 10 T 46 N R 4 W, St. Charles, MO

Built 2001 ADT: 7,404

MO 94 W

Over: CRD JUNGS STATION RD

S 10 T 46 N R 4 W, St. Charles, MO

Built 2001 ADT: 7,403

RT K S

Over: IS 64

S 1669 T 46 N R 3 E, St. Charles, MO

Built 2002 ADT: 29,761

MO 364 E

Over: IS 64

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

Built 2003 ADT: 28,363

IS 70 E

Over: LP 70

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

Built 1977 ADT: 7,203

IS 70 W

Over: LP 70

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

Built 1977 ADT: 9,393

RP US61S TO US40W

Over: CST PEARCE BLVD

S 19 T 47 N R 2 E, St. Charles, MO

Built 2003 ADT: 8,712

MO 94 E

Over: IS 70

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

Built 2006 ADT: 74,551

LAKE ST LOUIS BLVD

Over: IS 70

S 26 T 47 N R 2 E, St. Charles, MO

Built 2003 ADT: 50,817

RONALD REAGAN DR S

Over: IS 64

S 3 T 46 N R 2 E, St. Charles, MO

Built 2005 ADT: 38,141

MO 94 E

Over: OR 70

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

Built 2005 ADT: 6,032

MO 94 E

Over: CST BOONES LICK RD

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

Built 2005 ADT: 2,914

RT N E

Over: CST HENKE RD

S 3 T 46 N R 2 E, St. Charles, MO

Built 2006 ADT: 7,680

MEL WETTER PKWY S

Over: MO 370

S 3280 T 46 N R 4 E, St. Charles, MO

Built 2005 ADT: 19,077

PROSPECT RD E

Over: IS 64

S 29 T 47 N R 2 E, St. Charles, MO

Built 2009 ADT: 37,401

HARVESTER RD S

Over: MO 94

S 16 T 46 N R 4 E, St. Charles, MO

Built 2007 ADT: 32,922

MO 79 S

Over: OR 70

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

Built 1980 ADT: 3,102

MO 94 E

Over: CST JUNGERMANN RD

S 17 T 46 N R 4 E, St. Charles, MO

Built 2012 ADT: 20,253

MO 94 E

Over: CST WOODSTONE DR

S 16 T 46 N R 4 E, St. Charles, MO

Built 2011 ADT: 1,153

MO 94 W

Over: CST JUNGERMANN RD

S 17 T 46 N R 4 E, St. Charles, MO

Built 2012 ADT: 20,253

MO 94 W

Over: CST WOODSTONE DR

S 16 T 46 N R 4 E, St. Charles, MO

Built 2011 ADT: 1,153

HARVESTOWNE INDUST

Over: MO 94

S 17 T 46 N R 6 E, St. Charles, MO

Built 2012 ADT: 29,969

RT N E

Over: MO 364

S 1785 T 46 N R 3 E, St. Charles, MO

Built 2011 ADT: 24,602

MO 94 W

Over: CRD KISKER RD

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

Built 2012 ADT: 6,299

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