Iron County, MO

129 public highway bridges

Iron County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Iron County, Missouri contains 129 public highway bridges. Roughly 30.2% are rated “Good,” 59.7% “Fair,” and 9.3% “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.

129
Total Bridges
30.2%
Good
59.7%
Fair
9.3%
Poor Condition

Condition Distribution

Good
30.2% (39)
Fair
59.7% (77)
Poor
9.3% (12)

All Bridges (129)

MO 49 S

Fair

Over: MID FK BLACK RVR

S 32 T 34 N R 1 E, Iron, MO

Built 1984 Load: 34.2 t ADT: 117

RT M E

Fair

Over: MILL DAM CR

S 1 T 33 N R 3 E, Iron, MO

Built 1948 Load: 34.2 t ADT: 341

MO 49 S

Fair

Over: SUTTON BR

S 23 T 31 N R 3 E, Iron, MO

Built 1924 Load: 36.9 t ADT: 1,511

RT BB E

Fair

Over: BR BRUSH HOLLOW

S 11 T 30 N R 3 E, Iron, MO

Built 1962 Load: 36.9 t ADT: 268

RT A S

Fair

Over: DRAIN DTCH

S 34 T 34 N R 1 E, Iron, MO

Built 1939 Load: 38.7 t ADT: 272

MO 21 S

Fair

Over: MILL CR

S 7 T 32 N R 3 E, Iron, MO

Built 1932 Load: 39.6 t ADT: 876

RT E E

Fair

Over: BR MARBLE CR

S 22 T 32 N R 4 E, Iron, MO

Built 1978 Load: 40.5 t ADT: 1,193

MO 49 S

Fair

Over: QUARRY RD

S 2 T 34 N R 2 W, Iron, MO

Built 1982 Load: 40.5 t ADT: 1,805

MO 72 E

Fair

Over: RANKIN BR

S 36 T 34 N R 4 E, Iron, MO

Built 1930 Load: 43.2 t ADT: 1,719

MO 21 S

Fair

Over: PALMAR CR

S 23 T 33 N R 3 E, Iron, MO

Built 1985 Load: 46.8 t ADT: 3,562

MO 21 S

Fair

Over: BELLEVIEW CR

S 2113 T 35 N R 3 E, Iron, MO

Built 1996 Load: 46.8 t ADT: 2,124

RT AA E

Fair

Over: CARVER CR

S 32 T 33 N R 3 E, Iron, MO

Built 1963 Load: 47.7 t ADT: 185

RT A S

Fair

Over: PETER CAVE BR

S 23 T 34 N R 1 E, Iron, MO

Built 1970 Load: 50.4 t ADT: 272

COUNTY RD 20

Fair

Over: GUM SPRING CR

S 5 T 34 N R 3 E, Iron, MO

Built 1922 Load: 50.4 t ADT: 200

COUNTY RD 20

Fair

Over: GUM SPRING CR

S 5 T 34 N R 3 E, Iron, MO

Built 1922 Load: 50.4 t ADT: 200

MO 21 S

Fair

Over: KNOB CR

S 30 T 34 N R 4 E, Iron, MO

Built 1967 Load: 52.2 t ADT: 6,248

MO 21 S

Fair

Over: TRIB OF LOGAN CR

S 19 T 30 N R 9 E, Iron, MO

Built 1996 Load: 52.2 t ADT: 1,692

MO 49 S

Fair

Over: CAVE HOLLOW BR

S 22 T 32 N R 3 E, Iron, MO

Built 1986 Load: 52.2 t ADT: 1,311

MO 72 E

Fair

Over: PEARSON CR

S 36 T 34 N R 4 E, Iron, MO

Built 1930 Load: 52.2 t ADT: 1,719

RT N N

Fair

Over: INDIAN CR

S 13 T 34 N R 3 E, Iron, MO

Built 1932 Load: 52.2 t ADT: 3,309

RT A S

Fair

Over: E FK KAOLIN CR

S 12 T 34 N R 1 E, Iron, MO

Built 1933 Load: 52.2 t ADT: 272

MO 21 S

Fair

Over: MIDDLEBROOK CR

S 14 T 34 N R 3 E, Iron, MO

Built 1967 Load: 55.8 t ADT: 1,692

MO 143 S

Fair

Over: HAWK BR

S 10 T 30 N R 4 E, Iron, MO

Built 1973 Load: 57.6 t ADT: 590

RT E E

Fair

Over: MARBLE CR

S 28 T 33 N R 4 E, Iron, MO

Built 1976 Load: 57.6 t ADT: 1,193

RT N S

Fair

Over: BLACK RVR

S 30 T 34 N R 3 E, Iron, MO

Built 1976 Load: 65.7 t ADT: 1,290

HARRY BAYS

Fair

Over: INDIAN CR

S 25 T 35 N R 2 W, Iron, MO

Built 1975 Load: 71.1 t ADT: 50

MO 221 S

Fair

Over: W BR OF KNOB CR

S 19 T 34 N R 4 E, Iron, MO

Built 2000 Load: 76.5 t ADT: 2,236

MO 32 E

Fair

Over: CEDAR CR

S 218 T 35 N R 2 E, Iron, MO

Built 1922 Load: 79.2 t ADT: 980

BARRELL LOTZ RD

Good

Over: BR OF BIG CR

S 16 T 31 N R 3 E, Iron, MO

Built 2004 Load: 9.0 t ADT: 20

COUNTY RD 31

Good

Over: BR OF ST FRANCIS R

S 36 T 35 N R 3 E, Iron, MO

Built 1968 Load: 16.2 t ADT: 300

RIDGE RD-124

Good

Over: CRANE POND CR

S 20 T 32 N R 4 E, Iron, MO

Built 1940 Load: 16.2 t ADT: 45

RT E E

Good

Over: BR MARBLE CR

S 20 T 33 N R 4 E, Iron, MO

Built 1932 Load: 24.3 t ADT: 1,193

RT Z S

Good

Over: COURTOIS CR

S 33 T 35 N R 1 W, Iron, MO

Built 1958 Load: 25.2 t ADT: 106

RT O S

Good

Over: IMBODEN FK

S 22 T 34 N R 2 E, Iron, MO

Built 1957 Load: 26.1 t ADT: 284

RT E E

Good

Over: BR MARBLE CR

S 29 T 33 N R 4 E, Iron, MO

Built 1931 Load: 28.8 t ADT: 1,193

INDUSTRIAL DR

Good

Over: KNOB BR

S 29 T 34 N R 4 E, Iron, MO

Built 1990 Load: 29.7 t ADT: 50

MO 21 S

Good

Over: REEDS CR

S 19 T 35 N R 3 E, Iron, MO

Built 2011 Load: 29.7 t ADT: 2,204

ST MARYS RD

Good

Over: KNOB CR

S 32 T 34 N R 4 E, Iron, MO

Built 1988 Load: 32.4 t ADT: 750

LOWER CARVER 121

Good

Over: LIT CARVER CR

S 34 T 32 N R 3 E, Iron, MO

Built 1972 Load: 32.4 t ADT: 75

RIDGE RD-124

Good

Over: BIG CR

S 14 T 32 N R 3 E, Iron, MO

Built 1995 Load: 32.4 t ADT: 200

MO 21 S

Good

Over: MINOR CR

S 14 T 33 N R 3 E, Iron, MO

Built 1985 Load: 32.4 t ADT: 3,562

CR 53

Good

Over: LOGAN CR

S 9 T 34 N R 3 E, Iron, MO

Built 2023 Load: 32.4 t ADT: 75

RT K E

Good

Over: BEAR BR

S 20 T 31 N R 3 E, Iron, MO

Built 1936 Load: 33.3 t ADT: 306

COUNTY RD 167

Good

Over: BLACK CR

S 8 T 30 N R 4 E, Iron, MO

Built 2012 Load: 34.2 t ADT: 100

COUNTY RD 20

Good

Over: CEDAR CR

S 3 T 34 N R 2 E, Iron, MO

Built 1999 Load: 36.0 t ADT: 100

COUNTY RD 123

Good

Over: BIG CR

S 14 T 32 N R 3 E, Iron, MO

Built 2008 Load: 36.0 t ADT: 250

RT E E

Good

Over: MARBLE CR BR

S 28 T 33 N R 4 E, Iron, MO

Built 1976 Load: 36.9 t ADT: 1,193

RT E E

Good

Over: MARBLE CR

S 23 T 32 N R 4 E, Iron, MO

Built 1978 Load: 36.9 t ADT: 1,193

COUNTY RD 100

Good

Over: STOUTS CR

S 6 T 33 N R 4 E, Iron, MO

Built 2003 Load: 37.8 t ADT: 20

RT E E

Good

Over: MARBLE CR

S 23 T 32 N R 4 E, Iron, MO

Built 1978 Load: 37.8 t ADT: 1,193

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

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.