Mineral County, MT

152 public highway bridges

Mineral County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Mineral County, Montana contains 152 public highway bridges. Roughly 18.4% are rated “Good,” 43.4% “Fair,” and 9.2% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

152
Total Bridges
18.4%
Good
43.4%
Fair
9.2%
Poor Condition

Condition Distribution

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

All Bridges (152)

RD 506

Fair

Over: ST REGIS RIVER

CLIFF-RAINY CR, Mineral, MT

Built 1954 Load: 18.5 t ADT: 50

I 90

Fair

Over: ST. REGIS RIVER

4.3M W ST. REGIS, Mineral, MT

Built 1981 Load: 20.0 t ADT: 3,180

RD 250

Fair

Over: TROUT CR

PIERCE-SUPERIOR, Mineral, MT

Built 1965 Load: 21.1 t ADT: 50

NO DATA ENTERED

Fair

Over: CEDAR CR

CEDAR CR, Mineral, MT

Built 1935 Load: 21.4 t ADT: 50

I 90 EB

Fair

Over: ST. REGIS RIVER

1.9M W ST. REGIS, Mineral, MT

Built 1981 Load: 21.8 t ADT: 3,180

OLD HWY 10 E

Fair

Over: CLARK FK-RR 060

ST REGIS, Mineral, MT

Built 1942 Load: 21.8 t ADT: 119

RD 388

Fair

Over: HOODOO CREEK

HOODOO CREEK, Mineral, MT

Built 1957 Load: 22.0 t ADT: 50

NO DATA ENTERED

Fair

Over: SILVER CREEK

SILVER CR, Mineral, MT

Built 1984 Load: 23.3 t ADT: 50

RD 810

Fair

Over: ST REGIS RIVER

DOMINION CR, Mineral, MT

Built 1957 Load: 23.3 t ADT: 50

DIAMOND MATCH RD

Fair

Over: RR

3M SE SUPERIOR, Mineral, MT

Built 1955 Load: 23.6 t ADT: 703

I 90

Fair

Over: ST. REGIS RVR-INT RAMP

3.7M W ST. REGIS, Mineral, MT

Built 1981 Load: 24.5 t ADT: 22

MULLAN GULCH RD

Fair

Over: ROCK CREEK 013

HENDERSON, Mineral, MT

Built 1931 Load: 24.5 t ADT: 147

RD 450

Fair

Over: WINDFALL CR

VERDE WINDFALL, Mineral, MT

Built 1967 Load: 24.9 t ADT: 50

I 90

Fair

Over: ST. REGIS RIVER

SALTESE, Mineral, MT

Built 1973 Load: 26.3 t ADT: 7,352

I 90

Fair

Over: CLARK FORK RIVER

1.9M E SUPERIOR, Mineral, MT

Built 1966 Load: 26.3 t ADT: 3,776

I 90

Fair

Over: RR

9.3M W ALBERTON, Mineral, MT

Built 1981 Load: 26.3 t ADT: 4,036

MULLAN GULCH RD

Fair

Over: TWELVEMILE CREEK 014

HENDERSON, Mineral, MT

Built 1931 Load: 26.3 t ADT: 147

I 90

Fair

Over: CLARK FORK RIVER

6.2M E SUPERIOR, Mineral, MT

Built 1967 Load: 26.4 t ADT: 3,776

I 90

Fair

Over: ST. REGIS RIVER

4.3M W ST. REGIS, Mineral, MT

Built 1981 Load: 27.2 t ADT: 3,180

I 90

Fair

Over: ST. REGIS RIVER

4.3M W ST. REGIS, Mineral, MT

Built 1981 Load: 27.2 t ADT: 3,180

RD 352

Fair

Over: TWELVEMILE CREEK

HENDERSON-THOMPSON, Mineral, MT

Built 1955 Load: 27.9 t ADT: 50

I 90

Fair

Over: ST. REGIS RIVER

0.6M W SALTESE, Mineral, MT

Built 1973 Load: 28.1 t ADT: 7,745

I 90

Fair

Over: CLARK FORK RIVER

6.2M E SUPERIOR, Mineral, MT

Built 1967 Load: 28.1 t ADT: 7,551

I 90

Fair

Over: CLARK FORK RIVER

10.5M E SUPERIOR, Mineral, MT

Built 1967 Load: 28.1 t ADT: 3,776

RD 352

Fair

Over: TWELVEMILE CREEK

HENDERSON-THOMPSON, Mineral, MT

Built 1955 Load: 28.2 t ADT: 50

RD 450

Fair

Over: TROUT CR

VERDE WINDFALL, Mineral, MT

Built 1967 Load: 28.2 t ADT: 50

RD 1181

Fair

Over: E FK BIG CREEK

MIDDLE FK BIG CR, Mineral, MT

Built 1954 Load: 28.2 t ADT: 50

I 90 EB

Fair

Over: ST. REGIS RIVER

5.6M E DE BORGIA, Mineral, MT

Built 1980 Load: 29.0 t ADT: 3,676

I 90

Fair

Over: ST. REGIS RIVER

4.3M W ST. REGIS, Mineral, MT

Built 1981 Load: 29.0 t ADT: 3,180

I 90

Fair

Over: ST. REGIS RIVER

ST. REGIS, Mineral, MT

Built 1983 Load: 29.9 t ADT: 3,513

I 90

Fair

Over: CLARK FORK RIVER

10.5M E SUPERIOR, Mineral, MT

Built 1967 Load: 29.9 t ADT: 3,776

PACKER CREEK RD

Fair

Over: ST REGIS RIVER 007

SALTESE, Mineral, MT

Built 1957 Load: 29.9 t ADT: 100

MONTANA CREEK ROAD

Fair

Over: SOUTH FORK FISH CR

MONTANA CREEK ROAD, Mineral, MT

Built 1973 Load: 30.5 t ADT: 50

I 90 EB

Fair

Over: ST. REGIS RIVER

5.6M E DE BORGIA, Mineral, MT

Built 1980 Load: 31.8 t ADT: 3,676

I 90

Fair

Over: ST. REGIS RVR-INT RAMP

ST. REGIS, Mineral, MT

Built 1983 Load: 32.7 t ADT: 442

I 90 WB

Fair

Over: RR

9.3M E SUPERIOR, Mineral, MT

Built 1967 Load: 32.7 t ADT: 3,776

I 90

Fair

Over: RR

9.3M W ALBERTON, Mineral, MT

Built 1965 Load: 32.7 t ADT: 4,036

BIG CREEK RD

Fair

Over: ST REGIS RIVER 019

HAUGAN, Mineral, MT

Built 1972 Load: 32.7 t ADT: 100

PACKER CREEK RD

Fair

Over: PACKER CREEK 008

N SALTESE, Mineral, MT

Built 1957 Load: 32.7 t ADT: 100

I 90

Fair

Over: CLARK FORK RIVER

3.7M W SUPERIOR, Mineral, MT

Built 1982 Load: 33.6 t ADT: 3,615

I 90

Fair

Over: CLARK FORK RIVER

2.5M W SUPERIOR, Mineral, MT

Built 1960 Load: 33.6 t ADT: 3,615

I 90 EB

Fair

Over: RR

9.3M E SUPERIOR, Mineral, MT

Built 1967 Load: 33.6 t ADT: 3,776

I 90

Fair

Over: CLARK FORK RIVER

9.3M W ALBERTON, Mineral, MT

Built 1981 Load: 33.6 t ADT: 4,036

RD 889

Fair

Over: WARD CREEK

WARD CR, Mineral, MT

Built 1960 Load: 34.0 t ADT: 50

RD 342

Fair

Over: DRY CR

DRY CR, Mineral, MT

Built 1959 Load: 34.3 t ADT: 50

RIVER ST N

Fair

Over: CLARK FORK 003

SUPERIOR-RIVER ST N, Mineral, MT

Built 1972 Load: 34.5 t ADT: 2,332

I 90

Fair

Over: ST. REGIS RVR-LOCAL RD

4.3M E DE BORGIA, Mineral, MT

Built 1979 Load: 35.4 t ADT: 7,352

NO DATA ENTERED

Fair

Over: ST REGIS RIVER

NO DATA ENTERED, Mineral, MT

Built 1900 Load: 35.6 t ADT: 50

I 90

Fair

Over: CLARK FORK RIVER

1.9M E SUPERIOR, Mineral, MT

Built 1960 Load: 36.3 t ADT: 3,776

NO DATA ENTERED

Fair

Over: HENDERSON CREEK

NO DATA ENTERED, Mineral, MT

Built 1955 Load: 37.3 t ADT: 40

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.