Jefferson County, MT

128 public highway bridges

Jefferson County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Jefferson County, Montana contains 128 public highway bridges. Roughly 10.9% are rated “Good,” 46.9% “Fair,” and 5.5% “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.

128
Total Bridges
10.9%
Good
46.9%
Fair
5.5%
Poor Condition

Condition Distribution

Good
10.9% (14)
Fair
46.9% (60)
Poor
5.5% (7)

All Bridges (128)

LOWER VALLEY RD -

Fair

Over: BOULDER RIVER 030

13M SE BOULDER, Jefferson, MT

Built 1977 Load: 10.9 t ADT: 100

TEBAY LN

Fair

Over: JEF RIV OVERFLOW 013

3M W CARDWELL, Jefferson, MT

Built 2003 Load: 17.2 t ADT: 177

WHITETAIL RD

Fair

Over: WHITETAIL CREEK

2M N WHITEHALL, Jefferson, MT

Built 1983 Load: 19.0 t ADT: 399

I 15

Fair

Over: BOULDER RIVER

1.2M W BOULDER, Jefferson, MT

Built 1979 Load: 19.1 t ADT: 1,904

NO DATA ENTERED

Fair

Over: BISON CREEK

BERNICE JUNCTION, Jefferson, MT

Built 1986 Load: 19.8 t ADT: 50

I 90

Fair

Over: RR

5.6M W WHITEHALL, Jefferson, MT

Built 1966 Load: 20.0 t ADT: 4,591

I 15

Fair

Over: BOULDER RIVER

1.9M W BOULDER, Jefferson, MT

Built 1980 Load: 20.9 t ADT: 1,904

I 90

Fair

Over: RR

5.6M W WHITEHALL, Jefferson, MT

Built 1966 Load: 21.8 t ADT: 4,591

BASIN ST

Fair

Over: BASIN CREEK 040

BASIN, Jefferson, MT

Built 1931 Load: 22.3 t ADT: 100

MT HWY 2

Fair

Over: BIG PIPESTONE CREEK 062

4M W WHITEHALL, Jefferson, MT

Built 1931 Load: 22.7 t ADT: 579

S 2

Fair

Over: RADER CREEK

7M E PIPESTONE PASS, Jefferson, MT

Built 1931 Load: 22.7 t ADT: 673

S 2

Fair

Over: WHITETAIL CREEK

WHITEHALL, Jefferson, MT

Built 1955 Load: 22.7 t ADT: 1,393

E 1ST STREET

Fair

Over: WHITETAIL CREEK 023

WHITEHALL-E 1ST ST, Jefferson, MT

Built 1984 Load: 23.0 t ADT: 100

GALENA GULCH ROAD

Fair

Over: BOULDER RIVER

I15 HIGH ORE EXIT, Jefferson, MT

Built 1957 Load: 23.3 t ADT: 50

I 15

Fair

Over: ABANDONED RR

0.6M S MONTANA CITY, Jefferson, MT

Built 1969 Load: 24.5 t ADT: 3,739

CATTLE DRIVE RD

Fair

Over: BOULDER RIVER 017

2M W BOULDER, Jefferson, MT

Built 1983 Load: 24.5 t ADT: 100

I 15 FRONTAGE RD

Fair

Over: BISON CREEK 047

4M W BASIN, Jefferson, MT

Built 1985 Load: 24.5 t ADT: 100

MT HWY 2

Fair

Over: BOULDER RIVER 064

1M E CARDWELL, Jefferson, MT

Built 1968 Load: 24.5 t ADT: 385

TEBAY LN

Fair

Over: JEFFERSON RIVER 012

3M W CARDWELL, Jefferson, MT

Built 1986 Load: 24.5 t ADT: 177

S 41

Fair

Over: LITTLE PIPESTONE CREEK

9M E PIPESTONE PASS, Jefferson, MT

Built 1934 Load: 24.5 t ADT: 464

I 15

Fair

Over: BOULDER RIVER

2.5M W BOULDER, Jefferson, MT

Built 1980 Load: 25.4 t ADT: 1,904

BASIN CREEK RD

Fair

Over: BASIN CREEK 032

BASIN, Jefferson, MT

Built 1960 Load: 25.4 t ADT: 100

I 15 FRONTAGE RD

Fair

Over: BOULDER RIVER 046

2M W BASIN, Jefferson, MT

Built 1985 Load: 25.4 t ADT: 100

I 15 FRONTAGE RD

Fair

Over: BOULDER RIVER 042

BASIN, Jefferson, MT

Built 1985 Load: 26.3 t ADT: 100

WHITE BRIDGE RD

Fair

Over: BOULDER RIVER 044

6M SE BOULDER, Jefferson, MT

Built 1979 Load: 26.9 t ADT: 100

WATERLOO RD

Fair

Over: JEFFERSON RIVER

9M NE SILVERSTAR, Jefferson, MT

Built 1961 Load: 27.2 t ADT: 237

I 15

Fair

Over: BOULDER RIVER

4.3M E BASIN, Jefferson, MT

Built 1980 Load: 28.1 t ADT: 3,807

I 15 FRONTAGE RD

Fair

Over: BOULDER RIVER 043

2M W BASIN, Jefferson, MT

Built 1985 Load: 28.1 t ADT: 100

SHAMROCK ROAD

Fair

Over: BOULDER RIVER

2 MI PAST WHITEHOUSE C. G, Jefferson, MT

Built 1980 Load: 28.2 t ADT: 40

GALENA GULCH RD

Fair

Over: BOULDER RIVER 016

4M E BASIN, Jefferson, MT

Built 2003 Load: 29.9 t ADT: 100

I 15

Fair

Over: BOULDER RIVER

2.5M W BOULDER, Jefferson, MT

Built 1980 Load: 30.8 t ADT: 1,904

MT HWY 2

Fair

Over: COLBERT CREEK 063

7M W WHITEHALL, Jefferson, MT

Built 1931 Load: 30.8 t ADT: 579

LEGAL TENDER LN

Fair

Over: PRICKLY PEAR CREEK 070

CLANCY, Jefferson, MT

Built 1976 Load: 32.7 t ADT: 100

RAILROAD WAY

Fair

Over: PRICKLY PEAR CREEK 065

CLANCY, Jefferson, MT

Built 1976 Load: 32.7 t ADT: 100

MCCLELLAN CREEK RD

Fair

Over: MCCLELLAN CREEK 021

MONTANA CITY, Jefferson, MT

Built 1975 Load: 32.7 t ADT: 100

TEBAY LN

Fair

Over: JEFFERSON SLOUGH 014

3M W CARDWELL, Jefferson, MT

Built 1991 Load: 32.7 t ADT: 177

YELLOWSTONE TRAIL

Fair

Over: WHITETAIL CREEK 024

WHITEHALL-YELLOWSTONE TRL, Jefferson, MT

Built 1986 Load: 32.7 t ADT: 100

I 15

Fair

Over: PRICKLY PEAR CREEK

0.6M S CLANCY, Jefferson, MT

Built 1969 Load: 34.0 t ADT: 5,910

CATARACT CREEK RD

Fair

Over: CATARACT CREEK 034

1M N BASIN, Jefferson, MT

Built 1967 Load: 34.4 t ADT: 100

HUBBARD LN

Fair

Over: BOULDER RIVER 031

4M S BOULDER, Jefferson, MT

Built 2001 Load: 35.4 t ADT: 100

S 359

Fair

Over: JEFFERSON RIVER SLOUGH

CARDWELL, Jefferson, MT

Built 1968 Load: 35.4 t ADT: 985

I 15

Fair

Over: PRICKLY PEAR CREEK

1.2M S CLANCY, Jefferson, MT

Built 1969 Load: 36.3 t ADT: 5,910

I 90

Fair

Over: SEP COUNTY ROAD

7.4M E CARDWELL, Jefferson, MT

Built 1969 Load: 36.3 t ADT: 5,527

CATARACT CREEK RD

Fair

Over: CATARACT CREEK 048

3M N BASIN, Jefferson, MT

Built 1939 Load: 36.3 t ADT: 100

HIGH ORE RD

Fair

Over: BOULDER RIVER 038

3M E BASIN, Jefferson, MT

Built 1980 Load: 38.1 t ADT: 100

CATARACT CREEK RD

Fair

Over: CATARACT CREEK 035

2M N BASIN, Jefferson, MT

Built 1965 Load: 39.0 t ADT: 100

I 15 NB

Fair

Over: ABANDONED RR

0.6M S MONTANA CITY, Jefferson, MT

Built 1969 Load: 39.9 t ADT: 3,739

I 15

Fair

Over: BOULDER RIVER

2.5M S BASIN, Jefferson, MT

Built 1985 Load: 40.8 t ADT: 3,141

I 15

Fair

Over: BOULDER RIVER

1.9M S BASIN, Jefferson, MT

Built 1985 Load: 40.8 t ADT: 3,141

I 15

Fair

Over: BOULDER RIVER

1.2M S BASIN, Jefferson, MT

Built 1985 Load: 40.8 t ADT: 3,141

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.