Carbon County, MT

77 public highway bridges

Carbon County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Carbon County, Montana contains 77 public highway bridges. Roughly 33.8% are rated “Good,” 61% “Fair,” and 5.2% “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.

77

Total Bridges

33.8%

Good

61%

Fair

5.2%

Poor Condition

Condition Distribution

Good

33.8% (26)

Fair

61% (47)

Poor

5.2% (4)

All Bridges (77)

Sort:

CHERRY SPRINGS RD

Over: CLEAR CREEK 062

1M E ROBERTS, Carbon, MT

Built 1942 ADT: 100

RED LODGE CR RD

Over: VOLNEY CREEK 015

13M SW BOYD, Carbon, MT

Built 1991 Load: 4.5 t ADT: 100

BLUEWATER RD

Over: BLUEWATER CREEK 038

3M SE FROMBERG, Carbon, MT

Built 1915 Load: 6.4 t ADT: 100

BOYD COONEY DAM RD

Over: RED LODGE CREEK 013

COONEY RESERVOIR DAM, Carbon, MT

Built 1991 Load: 14.5 t ADT: 564

2-LANE ROAD

Over: WEST FORK ROCK CREEK

8 MILES WEST OF RED LODGE, Carbon, MT

Built 1965 Load: 15.2 t ADT: 50

1-LANE ROAD

Over: WEST ROSEBUD CREEK

9 MILES SW OF ROSCOE, Carbon, MT

Built 1959 Load: 16.2 t ADT: 50

1-LANE ROAD

Over: WEST FORK ROCK CREEK

11 MILES W. OF RED LODGE, Carbon, MT

Built 1956 Load: 17.5 t ADT: 50

E ROSEBUD RD

Over: EAST ROSEBUD CREEK 017

ROSCOE, Carbon, MT

Built 2010 Load: 18.5 t ADT: 76

LONE TREE RD

Over: RED LODGE CREEK 045

1M NW BOYD, Carbon, MT

Built 1972 Load: 19.8 t ADT: 100

BOYD COONEY DAM RD

Over: ROCK CREEK 027

1M W BOYD, Carbon, MT

Built 1973 Load: 21.7 t ADT: 564

E ROSEBUD RD

Over: EAST ROSEBUD CREEK 018

2M SW ROSCOE, Carbon, MT

Built 1993 Load: 21.7 t ADT: 76

1-LANE ROAD

Over: MAIN FORK ROCK CREEK

NO DATA ENTERED, Carbon, MT

Built 1952 Load: 22.0 t ADT: 50

S 78 FH 83

Over: EAST ROSEBUD CREEK

ROSCOE, Carbon, MT

Built 1959 Load: 22.7 t ADT: 478

NO DATA ENTERED

Over: LAKE FORK ROCK CREEK

NO DATA ENTERED, Carbon, MT

Built 1952 Load: 23.3 t ADT: 50

BRIDGER FROMBERG R

Over: BLUEWATER CREEK 001

2M SE FROMBERG, Carbon, MT

Built 1913 Load: 24.5 t ADT: 218

LOWER RIVER RD

Over: BLUEWATER CREEK 002

1M SE FROMBERG, Carbon, MT

Built 1932 Load: 24.5 t ADT: 100

US 310

Over: ROCK CREEK

ROCKVALE, Carbon, MT

Built 1934 Load: 24.5 t ADT: 5,030

S 72

Over: CLARKS FORK YELLOWSTONE

4M NE BELFRY, Carbon, MT

Built 2011 Load: 25.4 t ADT: 1,722

1-LANE ROAD

Over: LAKE FORK ROCK CREEK

NO DATA ENTERED, Carbon, MT

Built 1952 Load: 25.9 t ADT: 50

S MAIN ST

Over: ROCK CREEK 046

JOLIET, Carbon, MT

Built 1987 Load: 26.3 t ADT: 891

RIVERVIEW LN

Over: CLARKS FK YELLOWSTNE 007

2M S BELFRY, Carbon, MT

Built 1981 Load: 26.3 t ADT: 100

FOX EAST BENCH RD

Over: ROCK CREEK 025

FOX, Carbon, MT

Built 2006 Load: 26.9 t ADT: 100

GIBSON RD

Over: ROCK CREEK 029

1M E ROCKVALE, Carbon, MT

Built 1979 Load: 26.9 t ADT: 31

19TH STREET

Over: ROCK CREEK 059

RED LODGE-19TH ST, Carbon, MT

Built 2012 Load: 26.9 t ADT: 359

VOLNEY CREEK RD

Over: RED LODGE CREEK 042

6M SE ROSCOE, Carbon, MT

Built 1930 Load: 27.2 t ADT: 100

US 310

Over: CLARKS FK YELLOWSTONE

2M S BRIDGER, Carbon, MT

Built 1971 Load: 28.1 t ADT: 2,245

DUTCH LN

Over: SILVERTIP CREEK 060

1M NE BELFRY, Carbon, MT

Built 2006 Load: 30.8 t ADT: 100

US 310

Over: BRIDGER CREEK

2M S BRIDGER, Carbon, MT

Built 1971 Load: 31.8 t ADT: 2,245

S 72

Over: CLARKS FORK YELLOWSTONE

5M S BELFRY, Carbon, MT

Built 1970 Load: 31.8 t ADT: 1,498

BOYD COONEY DAM RD

Over: COONEY RES SPILLWAY 014

7M W BOYD, Carbon, MT

Built 1982 Load: 32.7 t ADT: 564

RED LODGE CR RD

Over: E RED LODGE CREEK 010

8M W ROBERTS, Carbon, MT

Built 1970 Load: 32.7 t ADT: 100

TWO MILE BRIDGE RD

Over: ROCK CREEK 024

2M N RED LODGE, Carbon, MT

Built 1982 Load: 32.7 t ADT: 100

JOLIET FROMBERG RD

Over: ELBOW CREEK 035

2M SE JOLIET, Carbon, MT

Built 1979 Load: 32.7 t ADT: 173

CARBON AVE

Over: ROCK CREEK 026

1M E ROBERTS, Carbon, MT

Built 1982 Load: 32.7 t ADT: 100

E PRYOR RD

Over: CLARKS FK YELLOWSTNE 056

E EDGAR, Carbon, MT

Built 1980 Load: 32.7 t ADT: 411

E BRIDGER RD

Over: CLARKS FK YELLOWSTNE 055

E BRIDGER, Carbon, MT

Built 1980 Load: 32.7 t ADT: 258

GOLDEN LN

Over: CLARKS FK YELLOWSTNE 008

6M SW BRIDGER, Carbon, MT

Built 1981 Load: 32.7 t ADT: 100

US 212

Over: ROCK CREEK

1M W JOLIET, Carbon, MT

Built 1974 Load: 32.7 t ADT: 3,282

S 72

Over: CLARKS FORK YELLOWSTONE

1M N BELFRY, Carbon, MT

Built 2013 Load: 33.6 t ADT: 1,722

WILLOW CREEK RD

Over: WILLOW CREEK 061

7M SW ROBERTS, Carbon, MT

Built 1942 Load: 34.3 t ADT: 100

NO DATA ENTERED

Over: WEST FORK ROCK CREEK

NO DATA ENTERED, Carbon, MT

Built 1972 Load: 36.3 t ADT: 50

CHANCE RD

Over: CLARKS FK YELLOWSTNE 004

8M S BELFRY, Carbon, MT

Built 2004 Load: 36.3 t ADT: 100

US 310

Over: RR

16M SE BRIDGER, Carbon, MT

Built 2001 Load: 37.2 t ADT: 1,513

ACCESS ROAD

Over: LAYOUT CREEK

FROM N.P. VISITOR CENTER,, Carbon, MT

Built 1983 Load: 38.1 t ADT: 23

1-LANE ROAD

Over: SOUTH FORK SPRING CREEK

8 MILES SW OF RED LODGE, Carbon, MT

Built 1979 Load: 39.9 t ADT: 50

RED LODGE CR RD

Over: RED LODGE CREEK 012

11M SW BOYD, Carbon, MT

Built 2005 Load: 49.5 t ADT: 100

LESLIE RD

Over: ELBOW CREEK 036

2M SW EDGAR, Carbon, MT

Built 1913 Load: 54.4 t ADT: 100

East Side Road

Over: Rock Creek

4M S RED LODGE, Carbon, MT

Built 2023 ADT: 100

East Side Road

Over: Rock Creek

7M S Red Lodge, Carbon, MT

Built 2023 ADT: 100

Meeteetse Trail

Over: Rock Creek

1M SE of Red Lodge, Carbon, MT

Built 2023 ADT: 100

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

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Compiled by PlainBridges, Independent data publisher

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.