Iron County, MO

129 public highway bridges

Iron County Bridge Snapshot

Iron County, Missouri contains 129 public highway bridges in the FHWA National Bridge Inventory. Roughly 30.2% are rated “Good,” 59.7% “Fair,” 9.3% “Poor,” and 9.3% 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.

129
Total Bridges
30.2%
Good
9.3%
Poor
9.3%
Structurally Deficient

Condition Distribution

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

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial