Missoula County, MT

205 public highway bridges

Missoula County Bridge Snapshot

Missoula County, Montana contains 205 public highway bridges in the FHWA National Bridge Inventory. Roughly 28.8% are rated “Good,” 41.5% “Fair,” 7.3% “Poor,” and 7.3% 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 MT 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.

205

Total Bridges

28.8%

Good

7.3%

Poor

7.3%

Structurally Deficient

Condition Distribution

Good

28.8% (59)

Fair

41.5% (85)

Poor

7.3% (15)

SD

7.3% (15)

All Bridges (205)

Sort:

GILBERT CR. RD.

Over: ROCK CR

VALLEY OF THE MOON, Missoula, MT

Built 1975 Load: 13.3 t ADT: 50

W K GOLD CR RD

Over: WEST FORK GOLD CREEK

NO DATA ENTERED, Missoula, MT

Built 1997 Load: 14.3 t ADT: 50

GLACIER CREEK RD

Over: GLACIER CREEK 061

0.5M W CONDON, Missoula, MT

Built 1970 Load: 14.5 t ADT: 100

BENCH RD

Over: GRANT CREEK 019

7M N MISSOULA, Missoula, MT

Built 1955 Load: 16.3 t ADT: 100

LEWIS/CLARK CMPGRD

Over: LOLO CR

LEWIS & CLARK CAMP, Missoula, MT

Built 1964 Load: 19.1 t ADT: 50

BROOKS ST-US 12

Over: BITTERROOT RIVER

MISSOULA-BROOKS ST, Missoula, MT

Built 1968 Load: 19.1 t ADT: 27,605

I 90

Over: RR

0.6M W BONNER, Missoula, MT

Built 1963 Load: 20.0 t ADT: 6,035

STYLER DR

Over: GLACIER CREEK 059

1M SW CONDON, Missoula, MT

Built 1970 Load: 20.0 t ADT: 100

S ORANGE ST

Over: CLARK FORK RIVER

MISSOULA-S ORANGE ST, Missoula, MT

Built 2003 Load: 20.0 t ADT: 22,614

WEST FK BUTTE RD

Over: LOLO CR

WEST FK BUTTE, Missoula, MT

Built 1936 Load: 20.4 t ADT: 50

MARSHALL LAKE RD

Over: W FK CLEARWATER RIVER

MARSHALL LK, Missoula, MT

Built 1963 Load: 20.4 t ADT: 540

I 90

Over: RR

0.6M W BONNER, Missoula, MT

Built 1963 Load: 20.9 t ADT: 6,035

S HIGGINS AVE

Over: CLARK FORK R-PED PATHS

MISSOULA-S HIGGINS AVE, Missoula, MT

Built 1962 Load: 20.9 t ADT: 11,130

S 200

Over: BLACKFOOT RIVER

5M W POTOMAC, Missoula, MT

Built 1988 Load: 21.8 t ADT: 4,601

N RESERVE ST

Over: CLARK FORK RIVER

MISSOULA-N RESERVE ST, Missoula, MT

Built 1975 Load: 21.8 t ADT: 36,321

MADISON ST-US 12

Over: CLARK FORK RIVER

MISSOULA-MADISON ST, Missoula, MT

Built 1958 Load: 22.7 t ADT: 21,606

ARLENE RD

Over: CLARK FORK 105

24M SE MISSOULA, Missoula, MT

Built 1976 Load: 23.3 t ADT: 161

S 200 EB

Over: BLACKFOOT RIVER

5M W POTOMAC, Missoula, MT

Built 1940 Load: 23.6 t ADT: 2,301

W FK CLEARWATER RD

Over: CLEARWATER RIVER

W FK CLEARWATER RIV, Missoula, MT

Built 1951 Load: 23.7 t ADT: 40

E FRONT ST

Over: RATTLESNAKE CREEK

MISSOULA-E FRONT ST, Missoula, MT

Built 1932 Load: 24.5 t ADT: 1,568

NFSR

Over: CONDON CREEK

CONCON, Missoula, MT

Built 2010 Load: 24.6 t ADT: 50

SAWPIT

Over: NINEMILE CR

SAWPIT, Missoula, MT

Built 1970 Load: 24.6 t ADT: 50

NO DATA ENTERED

Over: BLIND CANYON

NO DATA ENTERED, Missoula, MT

Built 1991 Load: 24.9 t ADT: 50

I 90

Over: CLARK FORK RIVER

5M E ALBERTON, Missoula, MT

Built 1964 Load: 25.4 t ADT: 4,525

FOREST ROAD

Over: RED BUTTE CREEK

RED BUTTE CREEK, Missoula, MT

Built 2004 Load: 26.6 t ADT: 40

LACASSE LN

Over: FRENCHTOWN IRR CANAL 094

4M S FRENCHTOWN, Missoula, MT

Built 1960 Load: 26.8 t ADT: 186

PETTY CREEK RD

Over: CLARK FORK 008

2M E ALBERTON, Missoula, MT

Built 1964 Load: 27.2 t ADT: 930

SNOW BOWL RD

Over: GRANT CREEK 020

7M N MISSOULA, Missoula, MT

Built 1967 Load: 27.2 t ADT: 100

US 12 FH 11

Over: LOLO CREEK

1M S LOLO HOT SPRINGS, Missoula, MT

Built 1951 Load: 27.2 t ADT: 747

S 210

Over: MRL SPUR (NOT IN USE)

BONNER, Missoula, MT

Built 1929 Load: 27.2 t ADT: 2,063

I 90

Over: RR

1.9M W CLINTON, Missoula, MT

Built 1963 Load: 28.1 t ADT: 5,554

RIVERVIEW DR

Over: CLEARWATER RIVER 084

1M W SEELEY LAKE, Missoula, MT

Built 1967 Load: 28.1 t ADT: 100

ELK MEADOWS RD

Over: LOLO CR

ELK MEADOWS, Missoula, MT

Built 1960 Load: 28.2 t ADT: 50

W.SIDE 9-MILE RD

Over: NINEMILE CR.

W. SIDE NINEMILE, Missoula, MT

Built 1968 Load: 28.2 t ADT: 50

RATTLESNAKE CR RD

Over: RATTLESNAKE CREEK

RATTLESNAKE CR, Missoula, MT

Built 1981 Load: 28.5 t ADT: 50

MATTIE V

Over: NINEMILE CR

MATTIE V, Missoula, MT

Built 1979 Load: 28.5 t ADT: 50

US 12 FH 11

Over: LOLO CREEK

LOLO HOT SPRINGS, Missoula, MT

Built 1957 Load: 29.0 t ADT: 747

I 90

Over: RR

1.9M W CLINTON, Missoula, MT

Built 1963 Load: 29.9 t ADT: 5,554

W NINEMILE RD

Over: NINEMILE CREEK 029

12M NW FRENCHTOWN, Missoula, MT

Built 1972 Load: 29.9 t ADT: 477

GOLD CR RD

Over: GOLD CR

GOLD CR, Missoula, MT

Built 1983 Load: 30.1 t ADT: 50

SCHWARTZ CREEK RD

Over: CLARK FORK 093

1M S CLINTON, Missoula, MT

Built 1956 Load: 30.8 t ADT: 100

SCOTT ST

Over: RR

MISSOULA-SCOTT ST, Missoula, MT

Built 1979 Load: 30.8 t ADT: 6,596

MORMON PK RD

Over: LOLO CR

MORMON PK, Missoula, MT

Built 1958 Load: 31.8 t ADT: 50

PLACID LAKE RD S

Over: OWL CREEK 086

4M S SEELEY LAKE, Missoula, MT

Built 1973 Load: 31.8 t ADT: 100

GLACIER CREEK RD

Over: SWAN RIVER 058

W CONDON, Missoula, MT

Built 2003 Load: 31.8 t ADT: 100

US 12-E BROADWAY S

Over: RATTLESNAKE CREEK

MISSOULA-E BROADWAY ST, Missoula, MT

Built 1964 Load: 31.8 t ADT: 23,299

N RESERVE ST

Over: CLARK FORK R FLOOD PLAIN

MISSOULA-N RESERVE ST, Missoula, MT

Built 1977 Load: 31.8 t ADT: 36,321

I 90

Over: RR

5M W MISSOULA, Missoula, MT

Built 1966 Load: 32.7 t ADT: 9,435

I 90

Over: RR

5M W MISSOULA, Missoula, MT

Built 1966 Load: 32.7 t ADT: 9,435

I 90

Over: CLARK FORK RIVER

1.9M W BONNER, Missoula, MT

Built 1965 Load: 32.7 t ADT: 9,994

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 6, 2026