Mercer County, MO

137 public highway bridges

Mercer County Bridge Snapshot

Mercer County, Missouri contains 137 public highway bridges in the FHWA National Bridge Inventory. Roughly 44.5% are rated “Good,” 36.5% “Fair,” 19% “Poor,” and 19% 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.

137

Total Bridges

44.5%

Good

19%

Poor

19%

Structurally Deficient

Condition Distribution

Good

44.5% (61)

Fair

36.5% (50)

Poor

19% (26)

SD

19% (26)

All Bridges (137)

Sort:

GARNER ST

Over: BR OF W MUDDY CRK

S 1 T 64 N R 25 W, Mercer, MO

Built 1940 ADT: 15

BOBCAT ST

Over: LITTLE MEDICINE CR

S 19 T 66 N R 22 W, Mercer, MO

Built 1900 Load: 5.4 t ADT: 35

APRICOT ST

Over: SAND CRK

S 25 T 67 N R 24 W, Mercer, MO

Built 1950 Load: 9.0 t ADT: 15

AVALON AVE

Over: LITTLE MEDICINE CR

S 6 T 66 N R 22 W, Mercer, MO

Built 1936 Load: 9.9 t ADT: 35

ILLINOIS LOOP

Over: UP RR

S 21 T 64 N R 24 W, Mercer, MO

Built 1930 Load: 9.9 t ADT: 5

FLAGPOLE RD

Over: UP RR

S 6 T 65 N R 23 W, Mercer, MO

Built 1940 Load: 11.7 t ADT: 100

DOMINO PLACE

Over: BR OF LIT MED CRK

S 32 T 66 N R 22 W, Mercer, MO

Built 1920 Load: 12.6 t ADT: 5

JANUARY ST

Over: W MUDDY CR

S 6 T 63 N R 24 W, Mercer, MO

Built 1930 Load: 12.6 t ADT: 20

RT D E

Over: WELDON FK OF GRAND

S 28 T 64 N R 24 W, Mercer, MO

Built 1964 Load: 12.6 t ADT: 194

ARIZONA ST

Over: IRWIN CR

S 35 T 67 N R 23 W, Mercer, MO

Built 1900 Load: 13.5 t ADT: 30

FINCH AVE

Over: UP RR

S 12 T 65 N R 24 W, Mercer, MO

Built 1940 Load: 13.5 t ADT: 100

AWARD ST

Over: LITTLE MEDICINE CR

S 6 T 66 N R 22 W, Mercer, MO

Built 1900 Load: 14.4 t ADT: 5

RT JJ E

Over: E HONEY CR

S 10 T 63 N R 23 W, Mercer, MO

Built 1958 Load: 14.4 t ADT: 56

COMB AVE

Over: UP RR

S 31 T 66 N R 23 W, Mercer, MO

Built 1935 Load: 15.3 t ADT: 45

RT M E

Over: W MEDICINE CR

S 7 T 66 N R 22 W, Mercer, MO

Built 1935 Load: 16.2 t ADT: 135

AURORA ST

Over: IRWIN CR

S 2 T 66 N R 23 W, Mercer, MO

Built 1999 Load: 17.1 t ADT: 20

RT K E

Over: WELDON FK OF GRAND

S 22 T 66 N R 24 W, Mercer, MO

Built 1977 Load: 17.1 t ADT: 550

ELLIOT RD

Over: BR WALDON CR

S 8 T 65 N R 24 W, Mercer, MO

Built 2005 Load: 20.7 t ADT: 25

RT N E

Over: SANDY CR

S 10 T 65 N R 25 W, Mercer, MO

Built 1954 Load: 22.5 t ADT: 389

FLAGPOLE RD

Over: MUDDY CR

S 6 T 65 N R 23 W, Mercer, MO

Built 1990 Load: 23.4 t ADT: 100

US 136 E

Over: W MUDDY CR

S 25 T 65 N R 25 W, Mercer, MO

Built 1971 Load: 23.4 t ADT: 1,210

US 136 E

Over: WELDON FK OF GRAND

S 28 T 65 N R 24 W, Mercer, MO

Built 1971 Load: 23.4 t ADT: 1,883

RT M E

Over: WARDEN BR

S 12 T 66 N R 23 W, Mercer, MO

Built 1935 Load: 23.4 t ADT: 135

RT JJ E

Over: BIG N CR

S 12 T 63 N R 23 W, Mercer, MO

Built 1958 Load: 24.3 t ADT: 44

RT D E

Over: MARTIN CR

S 34 T 64 N R 25 W, Mercer, MO

Built 1952 Load: 25.2 t ADT: 163

RT N E

Over: BRUSH CR

S 7 T 65 N R 25 W, Mercer, MO

Built 1954 Load: 25.2 t ADT: 363

RT D E

Over: SANDY CR

S 29 T 64 N R 25 W, Mercer, MO

Built 1958 Load: 26.1 t ADT: 163

KASOTA RD

Over: PETEET CR

S 3 T 63 N R 25 W, Mercer, MO

Built 2005 Load: 27.9 t ADT: 5

HAGAR PL

Over: BR OF SANDY CREEK

S 8 T 64 N R 24 W, Mercer, MO

Built 2005 Load: 27.9 t ADT: 5

RT D E

Over: SOAP CR

S 31 T 64 N R 24 W, Mercer, MO

Built 1930 Load: 27.9 t ADT: 194

RT P S

Over: BIG BR

S 19 T 65 N R 24 W, Mercer, MO

Built 1952 Load: 28.8 t ADT: 164

RT M E

Over: LIT MUDDY CR

S 20 T 66 N R 23 W, Mercer, MO

Built 1934 Load: 28.8 t ADT: 574

RT D E

Over: WILLOW BR

S 29 T 64 N R 24 W, Mercer, MO

Built 1930 Load: 30.6 t ADT: 194

RT BB E

Over: BR OF WELDON FK CR

S 11 T 66 N R 24 W, Mercer, MO

Built 1961 Load: 32.4 t ADT: 166

RT P S

Over: BIG BR

S 18 T 65 N R 24 W, Mercer, MO

Built 2010 Load: 35.1 t ADT: 164

RT DD S

Over: MEDICINE CR

S 25 T 65 N R 23 W, Mercer, MO

Built 1961 Load: 36.0 t ADT: 74

ELLIOT RD

Over: BRUSH CR

S 20 T 66 N R 24 W, Mercer, MO

Built 2013 Load: 36.9 t ADT: 15

US 136 E

Over: BURRIS CR

S 6 T 65 N R 22 W, Mercer, MO

Built 1929 Load: 38.7 t ADT: 1,271

US 136 E

Over: WILDCAT CR

S 26 T 65 N R 24 W, Mercer, MO

Built 2006 Load: 44.1 t ADT: 889

US 136 E

Over: UP RR

S 26 T 65 N R 24 W, Mercer, MO

Built 2006 Load: 44.1 t ADT: 889

US 65 S

Over: WILDCAT CR

S 35 T 65 N R 24 W, Mercer, MO

Built 2001 Load: 45.9 t ADT: 2,170

CHER RD

Over: W FK LITTLE RVR

S 20 T 66 N R 24 W, Mercer, MO

Built 1994 Load: 48.6 t ADT: 40

FIREWORKS AVE

Over: TRIB TO MUDDY CR

S 19 T 65 N R 23 W, Mercer, MO

Built 1940 Load: 48.6 t ADT: 20

US 136 E

Over: W MUDDY CR

S 36 T 65 N R 25 W, Mercer, MO

Built 1971 Load: 52.2 t ADT: 1,210

US 136 E

Over: MARTIN CR

S 3 T 64 N R 25 W, Mercer, MO

Built 1931 Load: 57.6 t ADT: 1,074

CANNON AVE

Over: COAL CR

S 20 T 66 N R 25 W, Mercer, MO

Built 1999 Load: 58.5 t ADT: 15

RT E E

Over: COTTONWOOD BR

S 28 T 64 N R 22 W, Mercer, MO

Built 1969 Load: 58.5 t ADT: 439

US 136 E

Over: W MEDICINE CR

S 5 T 65 N R 22 W, Mercer, MO

Built 2002 Load: 59.4 t ADT: 1,271

IGLOO RD

Over: BR OF W MUDDY CR

S 30 T 64 N R 24 W, Mercer, MO

Built 1996 Load: 63.9 t ADT: 5

US 136 E

Over: LIT MEDICINE CR

S 2 T 65 N R 23 W, Mercer, MO

Built 2002 Load: 77.4 t ADT: 1,605

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