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:

I 90

Over: INT LOTHROP

2.5M E ALBERTON, Missoula, MT

Built 1975 ADT: 833

I 90

Over: INT LOTHROP

2.5M E ALBERTON, Missoula, MT

Built 1963 ADT: 833

I 90

Over: INT NINE MILE

6.8M W FRENCHTOWN, Missoula, MT

Built 1964 ADT: 140

I 90

Over: INT NINE MILE

6.8M W FRENCHTOWN, Missoula, MT

Built 1964 ADT: 140

I 90

Over: SEP HOULE CREEK ROAD

3.1M W FRENCHTOWN, Missoula, MT

Built 1971 ADT: 902

I 90

Over: SEP HOULE CREEK ROAD

3.1M W FRENCHTOWN, Missoula, MT

Built 1971 ADT: 902

I 90

Over: SEP LOISELLE ROAD

3.7M E FRENCHTOWN, Missoula, MT

Built 1971 ADT: 201

I 90

Over: SEP LOISELLE ROAD

3.7M E FRENCHTOWN, Missoula, MT

Built 1971 ADT: 201

I 90

Over: SEP BUTLER CREEK ROAD

3.7M W MISSOULA, Missoula, MT

Built 1966 ADT: 2,074

I 90

Over: SEP BUTLER CREEK ROAD

3.7M W MISSOULA, Missoula, MT

Built 1966 ADT: 2,074

I 90

Over: SEP AIRWAY BLVD

AIRPORT INTERCHANGE, Missoula, MT

Built 1997 ADT: 10,126

I 90

Over: SEP AIRWAY BLVD

AIRPORT INTERCHANGE, Missoula, MT

Built 1997 ADT: 10,126

I 90

Over: INT RESERVE STREET

MISSOULA, Missoula, MT

Built 1966 ADT: 5,977

I 90

Over: INT RESERVE STREET

MISSOULA, Missoula, MT

Built 1966 ADT: 5,977

I 90

Over: SEP COAL MINE ROAD

MISSOULA, Missoula, MT

Built 1966 ADT: 1,295

I 90

Over: SEP COAL MINE ROAD

MISSOULA, Missoula, MT

Built 1966 ADT: 1,295

I 90

Over: INT ORANGE STREET

MISSOULA, Missoula, MT

Built 1966 ADT: 100

I 90

Over: INT ORANGE STREET

MISSOULA, Missoula, MT

Built 1966 ADT: 100

I 90

Over: GREENOUGH DR-RATTLESNAKE

MISSOULA, Missoula, MT

Built 1966 ADT: 10,128

I 90

Over: GREENOUGH DR-RATTLESNAKE

MISSOULA, Missoula, MT

Built 1966 ADT: 10,128

I 90

Over: RATTLESNAKE CR-INT RAMP

MISSOULA, Missoula, MT

Built 1966 ADT: 10,128

I 90 EB

Over: INT VAN BUREN STREET

MISSOULA, Missoula, MT

Built 1964 ADT: 100

I 90 WB

Over: INT VAN BUREN STREET

MISSOULA, Missoula, MT

Built 1964 ADT: 100

I 90

Over: INT E MISSOULA

EAST MISSOULA, Missoula, MT

Built 1964 ADT: 10,503

I 90

Over: INT E MISSOULA

EAST MISSOULA, Missoula, MT

Built 1964 ADT: 10,503

I 90

Over: DEER CREEK ROAD

1.9M W BONNER, Missoula, MT

Built 1964 ADT: 344

I 90

Over: DEER CREEK ROAD

1.9M W BONNER, Missoula, MT

Built 1964 ADT: 344

I 90

Over: SEP JUNIPER DR-CLARK FK

1.2M W BONNER, Missoula, MT

Built 1965 ADT: 100

I 90

Over: SEP JUNIPER DR-CLARK FK

1.2M W BONNER, Missoula, MT

Built 1965 ADT: 100

I 90 EB

Over: SEP RUSTIC ROAD

1.2M E BONNER, Missoula, MT

Built 1964 ADT: 624

I 90 WB

Over: SEP RUSTIC ROAD

1.2M E BONNER, Missoula, MT

Built 1964 ADT: 624

I 90 EB

Over: INT TURAH

TURAH, Missoula, MT

Built 1964 ADT: 1,141

I 90 WB

Over: INT TURAH

TURAH, Missoula, MT

Built 1964 ADT: 1,141

I 90 EB

Over: SEP E MULLAN ROAD

3.7M W CLINTON, Missoula, MT

Built 1963 ADT: 212

I 90 WB

Over: SEP E MULLAN ROAD

3.7M W CLINTON, Missoula, MT

Built 1963 ADT: 212

I 90

Over: INT BEAVERTAIL

7.4M W BEARMOUTH, Missoula, MT

Built 1972 ADT: 161

I 90

Over: INT BEAVERTAIL

7.4M W BEARMOUTH, Missoula, MT

Built 1972 ADT: 161

ROCK CR RD

Over: CLARK FK-RR-HWY 106

ROCK CREEK INT, Missoula, MT

Built 1972 ADT: 100

HUSON RD

Over: INT HUSON-I 90 012

HUSON, Missoula, MT

Built 1971 ADT: 5,428

BONITA RNGR STA RD

Over: INT ROCK CREEK I 90 004

3M SE CLINTON, Missoula, MT

Built 1972 ADT: 6,316

IRR - US 93

Over: INT DESMET I 90

5M NW MISSOULA, Missoula, MT

Built 1966 ADT: 9,435

US 93

Over: INT DESMET I 90

5M NW MISSOULA, Missoula, MT

Built 1995 ADT: 5,995

S 200

Over: INT BONNER I 90

1M W BONNER, Missoula, MT

Built 1965 ADT: 6,035

RESERVE ST

Over: W BROADWAY ST-RR

MISSOULA-RESERVE ST, Missoula, MT

Built 1998 ADT: 17,775

S 210

Over: INT CLINTON-I 90

CLINTON, Missoula, MT

Built 1972 ADT: 6,316

S 263

Over: INT FRENCHTOWN-I 90

FRENCHTOWN, Missoula, MT

Built 1971 ADT: 5,428

Farm Access

Over: Frenchtown Main Canal

5 mi NW of Missoula, MT, Missoula, MT

Built 1970 ADT: 10

TREVI CR RD

Over: SO FK LOLO CR

TEVIS CR, Missoula, MT

Built 1981 ADT: 50

Kraft Creek Road

Over: Swan River

5.3 M S. of Condon, Missoula, MT

Built 1954 ADT: 100

NO DATA ENTERED

Over: BLIND CANYON CREEK

NO DATA ENTERED, Missoula, MT

Built 1985 Load: 7.5 t ADT: 50

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