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)

Sort:

MO 72 E

Over: MO 21

S 5 T 33 N R 4 E, Iron, MO

Built 1930 ADT: 3,589

MULBERRY ST

Over: BR OF STOUTS CR

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

Built 1960 Load: 4.5 t ADT: 100

LEONARD HUFF -137

Over: SULPHUR CR

S 8 T 31 N R 4 E, Iron, MO

Built 1972 Load: 5.4 t ADT: 15

RT C E

Over: CRANE POND CR

S 15 T 31 N R 4 E, Iron, MO

Built 1948 Load: 9.0 t ADT: 242

ADAMS CR RD

Over: MID FK BLACK RVR

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

Built 1991 Load: 9.9 t ADT: 35

MO 49 S

Over: UP RR, BIG CR

S 35 T 32 N R 3 E, Iron, MO

Built 1945 Load: 9.9 t ADT: 1,311

E MADISON ST

Over: UP RR

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

Built 1967 Load: 11.7 t ADT: 500

RT E E

Over: MARBLE CR

S 15 T 32 N R 4 E, Iron, MO

Built 1965 Load: 11.7 t ADT: 1,193

COUNTY RD 96

Over: ST FRANCOIS RVR

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

Built 1923 Load: 12.6 t ADT: 200

COUNTY RD 020

Over: CEDAR CR

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

Built 1950 Load: 12.6 t ADT: 100

SUTTON HOLLOW -147

Over: BR OF RICHLAND CR

S 35 T 31 N R 3 E, Iron, MO

Built 1965 Load: 13.5 t ADT: 45

COUNTY RD 157

Over: GOOSE CR

S 17 T 30 N R 4 E, Iron, MO

Built 1978 Load: 13.5 t ADT: 100

OLD RTE 21

Over: STOUTS CR

S 5 T 33 N R 4 E, Iron, MO

Built 1926 Load: 16.2 t ADT: 4,000

BUFFORD BOTTOM

Over: BR OF ST FRANCIS R

S 23 T 35 N R 3 E, Iron, MO

Built 1935 Load: 16.2 t ADT: 100

COUNTY RD 79

Over: HENDERSON CR

S 16 T 34 N R 1 W, Iron, MO

Built 1935 Load: 16.2 t ADT: 40

FLAT WOODS RD

Over: CREEK

S 24 T 33 N R 4 E, Iron, MO

Built 1945 Load: 16.2 t ADT: 35

BEAVER SLIDE RD

Over: CREEK

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

Built 1950 Load: 16.2 t ADT: 40

MINIMUN RD

Over: CRANE POND CR

S 3 T 31 N R 4 E, Iron, MO

Built 1950 Load: 16.2 t ADT: 75

COUNTY RD 149

Over: FUNK CR

S 5 T 30 N R 3 E, Iron, MO

Built 1940 Load: 16.2 t ADT: 50

OLD HWY 21

Over: CREEK

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

Built 1922 Load: 16.2 t ADT: 350

HARRY BAYS-001

Over: INDIAN CR

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

Built 1975 Load: 18.0 t ADT: 50

RT A S

Over: OTTERY CR

S 26 T 34 N R 1 E, Iron, MO

Built 1970 Load: 18.0 t ADT: 272

RT A S

Over: OTTERY CR

S 26 T 34 N R 1 E, Iron, MO

Built 1970 Load: 18.0 t ADT: 272

MO 32 E

Over: KAOLIN CR

S 36 T 35 N R 1 E, Iron, MO

Built 1926 Load: 19.8 t ADT: 786

MO 143 S

Over: BIG CR

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

Built 1933 Load: 20.7 t ADT: 590

RT A S

Over: OTTERY CR

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

Built 1970 Load: 21.6 t ADT: 272

RT E E

Over: UP RR

S 7 T 33 N R 4 E, Iron, MO

Built 1948 Load: 21.6 t ADT: 1,193

RT K E

Over: BIG CR

S 22 T 31 N R 3 E, Iron, MO

Built 1933 Load: 21.6 t ADT: 306

BANNER RD

Over: BR OF CEDAR CR

S 33 T 35 N R 2 E, Iron, MO

Built 1945 Load: 22.5 t ADT: 100

COUNTY RD 119

Over: LIT CARVER CR

S 20 T 32 N R 3 E, Iron, MO

Built 1975 Load: 22.5 t ADT: 15

DESARC TURNOFF-167

Over: BIG CR

S 18 T 30 N R 4 E, Iron, MO

Built 1930 Load: 22.5 t ADT: 100

MO 32 E

Over: KEESLING CR

S 33 T 35 N R 2 E, Iron, MO

Built 1922 Load: 23.4 t ADT: 980

RT O S

Over: IMBODEN FK

S 23 T 34 N R 2 E, Iron, MO

Built 1957 Load: 23.4 t ADT: 284

MO 221 S

Over: KNOB BR

S 20 T 34 N R 4 E, Iron, MO

Built 1954 Load: 23.4 t ADT: 2,236

MO 21 S

Over: STOUTS CR

S 5 T 33 N R 4 E, Iron, MO

Built 1967 Load: 24.3 t ADT: 4,167

ADAM CREEK RD

Over: ABBOTT CR

S 28 T 35 N R 1 W, Iron, MO

Built 1998 Load: 24.3 t ADT: 50

RT A S

Over: DRAIN DTCH

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

Built 1939 Load: 24.3 t ADT: 272

RT N S

Over: BLACK CR

S 35 T 34 N R 2 E, Iron, MO

Built 1974 Load: 25.2 t ADT: 1,290

MO 221 S

Over: BR KNOB CR

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

Built 1954 Load: 25.2 t ADT: 2,236

MO 49 S

Over: HAMPTON BR

S 24 T 31 N R 3 E, Iron, MO

Built 1924 Load: 26.1 t ADT: 1,511

RT E E

Over: BR MARBLE CR

S 18 T 33 N R 4 E, Iron, MO

Built 1930 Load: 26.1 t ADT: 1,193

MO 32 E

Over: CEDAR CR

S 2184 T 35 N R 2 E, Iron, MO

Built 1982 Load: 27.0 t ADT: 980

RT O S

Over: BELLEVIEW CR

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

Built 1957 Load: 27.0 t ADT: 284

RT Z S

Over: BEASLY HOLLOW BR

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

Built 1958 Load: 29.7 t ADT: 106

MO 49 S

Over: HUFF BR

S 23 T 32 N R 3 E, Iron, MO

Built 1922 Load: 31.5 t ADT: 1,311

COUNTY RD 42

Over: KNOB CR

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

Built 2008 Load: 32.4 t ADT: 250

MO 49 S

Over: CONCANNON CR

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

Built 1922 Load: 32.4 t ADT: 1,311

MO 32 E

Over: CROOKED CR

S 10 T 34 N R 2 W, Iron, MO

Built 1932 Load: 32.4 t ADT: 2,211

MO 49 S

Over: WILDCAT CR

S 18 T 30 N R 4 E, Iron, MO

Built 1925 Load: 33.3 t ADT: 1,787

RT BB E

Over: BRUSHY HOLLOW

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

Built 1962 Load: 33.3 t ADT: 268

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