Mineral County, MT

152 public highway bridges

Mineral County Bridge Snapshot

Mineral County, Montana contains 152 public highway bridges in the FHWA National Bridge Inventory. Roughly 18.4% are rated “Good,” 43.4% “Fair,” 9.2% “Poor,” and 9.2% 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.

152
Total Bridges
18.4%
Good
9.2%
Poor
9.2%
Structurally Deficient

Condition Distribution

Good
18.4% (28)
Fair
43.4% (66)
Poor
9.2% (14)
SD
9.2% (14)

All Bridges (152)

NO DATA ENTERED

Fair

Over: FISH CREEK

FISH CR LOLO CR, Mineral, MT

Built 1967 Load: 38.9 t ADT: 40

I 90

Fair

Over: ST. REGIS RVR-INT RAMP

ST. REGIS, Mineral, MT

Built 1983 Load: 39.0 t ADT: 822

300-1

Fair

Over: ST REGIS RIVER

ST REGIS RIVER, Mineral, MT

Built 1955 Load: 39.5 t ADT: 50

I 90

Fair

Over: CLARK FORK RIVER

2.5M W SUPERIOR, Mineral, MT

Built 1976 Load: 39.9 t ADT: 3,615

I 90 EB

Fair

Over: ST. REGIS RIVER

ST. REGIS, Mineral, MT

Built 1983 Load: 41.7 t ADT: 3,513

I 90

Fair

Over: CEDAR CREEK

1.2M E SUPERIOR, Mineral, MT

Built 1966 Load: 41.7 t ADT: 3,776

RD 9117

Fair

Over: TWELVEMILE CREEK

CABIN CITY CG, Mineral, MT

Built 1963 Load: 43.1 t ADT: 50

NO DATA ENTERED

Fair

Over: S FK FISH CREEK

FISH CR LOLO CR, Mineral, MT

Built 1973 Load: 44.1 t ADT: 50

RD 431

Fair

Over: TWOMILE CREEK

TWOMILE CR, Mineral, MT

Built 1959 Load: 45.0 t ADT: 40

RD 386

Fair

Over: ST REGIS RIVER

BIG CR RD 386, Mineral, MT

Built 1972 Load: 58.3 t ADT: 50

NO DATA ENTERED

Good

Over: ST REGIS RIVER

WARD CR, Mineral, MT

Built 1960 Load: 11.0 t ADT: 50

NO DATA ENTERED

Good

Over: ST REGIS RIVER

DEER CR, Mineral, MT

Built 1963 Load: 11.3 t ADT: 50

RD 18720

Good

Over: WARD CREEK

WARD CREEK, Mineral, MT

Built 1972 Load: 16.3 t ADT: 50

NO DATA ENTERED

Good

Over: RANDOLF CREEK

NO DATA ENTERED, Mineral, MT

Built 1991 Load: 17.8 t ADT: 40

UPHAM GULCH RD

Good

Over: CEDAR CREEK 051

4M S SUPERIOR, Mineral, MT

Built 2005 Load: 22.7 t ADT: 313

DIAMOND MATCH RD

Good

Over: CEDAR CREEK

1M SE SUPERIOR, Mineral, MT

Built 1955 Load: 22.7 t ADT: 703

RD 236

Good

Over: DEER CREEK

DEER CREEK, Mineral, MT

Built 1991 Load: 24.0 t ADT: 50

NO DATA ENTERED

Good

Over: DEER CR

FISH CR LOLO CR, Mineral, MT

Built 2004 Load: 25.3 t ADT: 50

NO DATA ENTERED

Good

Over: NO ELK CREEK

NO DATA ENTERED, Mineral, MT

Built 2004 Load: 25.3 t ADT: 40

NO DATA ENTERED

Good

Over: HAIR BALL

NO DATA ENTERED, Mineral, MT

Built 2004 Load: 25.3 t ADT: 40

NO DATA ENTERED

Good

Over: LOWER NO ELK CREEK

NO DATA ENTERED, Mineral, MT

Built 2004 Load: 25.3 t ADT: 40

SOUTHSIDE RD

Good

Over: DRY CREEK 002

5M W SUPERIOR, Mineral, MT

Built 1962 Load: 26.3 t ADT: 293

THOMPSON CR RD

Good

Over: S FK FISH CREEK

THOMPSON CR FISH CR, Mineral, MT

Built 1999 Load: 26.6 t ADT: 50

NO DATA ENTERED

Good

Over: PACKER CREEK

NO DATA ENTERED, Mineral, MT

Built 1980 Load: 26.9 t ADT: 50

NO DATA ENTERED

Good

Over: BIG CREEK

BIG CR, Mineral, MT

Built 1951 Load: 27.5 t ADT: 40

NO DATA ENTERED

Good

Over: FLAT CREEK CREEK

NO DATA ENTERED, Mineral, MT

Built 2004 Load: 27.5 t ADT: 40

RD 889

Good

Over: WARD CR

WARD CR, Mineral, MT

Built 1968 Load: 31.1 t ADT: 50

LITTLE JOE CR RD

Good

Over: ST REGIS RIVER 027

1M W ST REGIS, Mineral, MT

Built 1965 Load: 31.8 t ADT: 57

I 90

Good

Over: CEDAR CREEK

1.2M E SUPERIOR, Mineral, MT

Built 1960 Load: 32.7 t ADT: 3,776

RD 3822

Good

Over: BIG CREEK

W FK BIG CR, Mineral, MT

Built 2019 Load: 33.0 t ADT: 50

I 90

Good

Over: ST. REGIS RIVER

3.1M W ST. REGIS, Mineral, MT

Built 1981 Load: 35.4 t ADT: 3,180

NO DATA ENTERED

Good

Over: VAN NESS CREEK

NO DATA ENTERED, Mineral, MT

Built 2019 Load: 36.6 t ADT: 50

SURVEYOR CREEK

Good

Over: SURVEYOR CREEK

SURVEYOR CREEK, Mineral, MT

Built 2015 Load: 36.9 t ADT: 40

NO DATA ENTERED

Good

Over: SAVENAC CREEK

NO DATA ENTERED, Mineral, MT

Built 2009 Load: 43.1 t ADT: 50

NO DATA ENTERED

Good

Over: SF LITTLE JOE CREEK

NO DATA ENTERED, Mineral, MT

Built 2020 Load: 45.0 t ADT: 50

RIVULET RD

Good

Over: FISH CREEK 058

2M E RIVULET, Mineral, MT

Built 1986 Load: 47.2 t ADT: 349

OLD MILL LOOP

Good

Over: RR 056

ST REGIS, Mineral, MT

Built 1999 Load: 54.4 t ADT: 100

I 90

Good

Over: DRAINAGE

ST. REGIS, Mineral, MT

Built 1986 Load: 99.9 t ADT: 6,360

OLD HWY 10 W

Poor

Over: CLARK FORK 054

3M W ALBERTON, Mineral, MT

Built 1932 Load: 15.4 t ADT: 349

RD 343-2

Poor

Over: S FK FISH CREEK

FISH CR LOLO CR, Mineral, MT

Built 1966 Load: 18.5 t ADT: 50

FISH CR RD

Poor

Over: W FK FISH CREEK

FISH CR LOLO CR, Mineral, MT

Built 1966 Load: 18.5 t ADT: 50

FISH CR RD

Poor

Over: S FK FISH CREEK

FISH CR LOLO CR, Mineral, MT

Built 1965 Load: 18.8 t ADT: 50

OLD HWY 10 E

Poor

Over: ST REGIS RIVER 059

ST REGIS, Mineral, MT

Built 1937 Load: 21.8 t ADT: 119

S FRONTAGE RD W

Poor

Over: CLARK FORK 053

2M W ALBERTON, Mineral, MT

Built 1916 Load: 22.7 t ADT: 171

MULLAN RD E

Poor

Over: NEMOTE CREEK 006

2M NW TARKIO, Mineral, MT

Built 1931 Load: 24.5 t ADT: 100

I 90

Poor

Over: CLARK FORK RIVER

9.3M W ALBERTON, Mineral, MT

Built 1965 Load: 26.3 t ADT: 4,036

RD 352

Poor

Over: TWELVEMILE CREEK

HENDERSON-THOMPSON, Mineral, MT

Built 1955 Load: 26.9 t ADT: 50

RD 352

Poor

Over: TWELVEMILE CREEK

HENDERSON-THOMPSON, Mineral, MT

Built 1955 Load: 29.2 t ADT: 50

RD 388

Poor

Over: CEDAR CR

SNOWSHOE PASS, Mineral, MT

Built 1954 Load: 30.5 t ADT: 50

SLOWAY FRNTGE RD E

Poor

Over: ABANDONED RR 001

5M E ST REGIS, Mineral, MT

Built 1956 Load: 30.8 t ADT: 100

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