Beaverhead County, MT

217 public highway bridges

Beaverhead County Bridge Snapshot

Beaverhead County, Montana contains 217 public highway bridges in the FHWA National Bridge Inventory. Roughly 20.7% are rated “Good,” 49.3% “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.

217
Total Bridges
20.7%
Good
9.2%
Poor
9.2%
Structurally Deficient

Condition Distribution

Good
20.7% (45)
Fair
49.3% (107)
Poor
9.2% (20)
SD
9.2% (20)

All Bridges (217)

I 15

Fair

Over: SEP LOCAL ROAD

2.5M S DILLON, Beaverhead, MT

Built 1983 Load: 28.1 t ADT: 2,826

I 15

Fair

Over: SEP LOCAL ROAD

2.5M S DILLON, Beaverhead, MT

Built 1983 Load: 28.1 t ADT: 2,826

ROCK CREEK RD

Fair

Over: BIG HOLE RIVER 078

3M SW WISDOM, Beaverhead, MT

Built 1989 Load: 28.1 t ADT: 100

TRAPPER CR RD

Fair

Over: BIG HOLE OVERFLOW 055

MELROSE, Beaverhead, MT

Built 1973 Load: 28.1 t ADT: 187

S 43

Fair

Over: BIG HOLE RIVER

7M NW WISE RIVER, Beaverhead, MT

Built 1960 Load: 28.1 t ADT: 419

S 278

Fair

Over: GRASSHOPPER CREEK

21M W DILLON, Beaverhead, MT

Built 1957 Load: 28.1 t ADT: 656

S 324

Fair

Over: MEDICINE LODGE CREEK

7M E GRANT, Beaverhead, MT

Built 1963 Load: 28.1 t ADT: 282

I 15

Fair

Over: POINDEXTER SLOUGH

2.5M S DILLON, Beaverhead, MT

Built 1983 Load: 29.0 t ADT: 2,826

I 15

Fair

Over: POINDEXTER SLOUGH

2.5M S DILLON, Beaverhead, MT

Built 1983 Load: 29.0 t ADT: 2,826

OLD STAGE RD

Fair

Over: BEAVERHEAD RIVER 047

E BARRETTS INT, Beaverhead, MT

Built 1995 Load: 29.0 t ADT: 292

S 324

Fair

Over: HORSE PRAIRIE CREEK

8M E GRANT, Beaverhead, MT

Built 1963 Load: 29.0 t ADT: 282

I 15

Fair

Over: BEAVERHEAD RIVER

CLARK CANYON DAM, Beaverhead, MT

Built 1981 Load: 29.9 t ADT: 2,836

I 15

Fair

Over: BEAVERHEAD RIVER

8M N CLARK CANYON DAM, Beaverhead, MT

Built 1980 Load: 29.9 t ADT: 2,210

LOWER N FORK RD

Fair

Over: SWAMP CREEK 070

3M N WISDOM, Beaverhead, MT

Built 1975 Load: 29.9 t ADT: 44

LIMA DAM ROAD

Fair

Over: RED ROCK RIVER

5M E LIMA, Beaverhead, MT

Built 2019 Load: 30.8 t ADT: 116

OLD STAGE RD

Fair

Over: LOCAL DRAINAGE 048

E BARRETTS INT, Beaverhead, MT

Built 1959 Load: 31.8 t ADT: 292

S 278

Fair

Over: DRAINAGE

JACKSON, Beaverhead, MT

Built 1970 Load: 31.9 t ADT: 389

RED ROCK PASS RD

Fair

Over: ODELL CREEK

1.2 MI SE OF LAKEVIEW, Beaverhead, MT

Built 1992 Load: 32.7 t ADT: 100

I 15

Fair

Over: BEAVERHEAD RIVER

CLARK CANYON DAM, Beaverhead, MT

Built 1962 Load: 32.7 t ADT: 2,836

I 15

Fair

Over: DRAINAGE IRR DITCH

DILLON, Beaverhead, MT

Built 1973 Load: 32.7 t ADT: 3,991

CO RD 002 FH 73

Fair

Over: WISE RIVER 020

12M S WISE RIVER, Beaverhead, MT

Built 1971 Load: 32.7 t ADT: 289

CO RD 002 FH 73

Fair

Over: WISE RIVER 076

13M S WISE RIVER, Beaverhead, MT

Built 1971 Load: 32.7 t ADT: 289

LOWER N FORK RD

Fair

Over: IRRIGATION CANAL 068

7M N WISDOM, Beaverhead, MT

Built 1994 Load: 32.7 t ADT: 44

TWIN LAKES RD

Fair

Over: BIG HOLE RIVER 080

6M S WISDOM, Beaverhead, MT

Built 1999 Load: 32.7 t ADT: 100

BIG LAKE CR

Fair

Over: BIG HOLE RIVER 090

8M NW JACKSON, Beaverhead, MT

Built 1977 Load: 32.7 t ADT: 100

SAGE CREEK RD

Fair

Over: SAGE CREEK 024

12M NE DELL, Beaverhead, MT

Built 1985 Load: 32.7 t ADT: 70

BIG SHEEP CR RD

Fair

Over: BIG SHEEP CREEK 122

5.6M SW DELL, Beaverhead, MT

Built 1985 Load: 32.7 t ADT: 175

S 43 FH 20

Fair

Over: BIG HOLE RIVER

WISDOM, Beaverhead, MT

Built 1962 Load: 32.7 t ADT: 590

S 278

Fair

Over: WARM SPRING CREEK

JACKSON, Beaverhead, MT

Built 1970 Load: 33.5 t ADT: 389

I 15

Fair

Over: BEAVERHEAD RIVER

5M N CLARK CANYON DAM, Beaverhead, MT

Built 1964 Load: 34.0 t ADT: 2,836

I 15

Fair

Over: RED ROCK RIVER

6.2M S CLARK CANYON DAM, Beaverhead, MT

Built 1962 Load: 34.5 t ADT: 2,089

CO RD 002 FH 73

Fair

Over: WISE RIVER 018

18M S WISE RIVER, Beaverhead, MT

Built 1987 Load: 34.5 t ADT: 289

I 15 FRONTAGE RD

Fair

Over: BEAVERHEAD R-INT RAMP

8M N CLARK CANYON DAM, Beaverhead, MT

Built 1988 Load: 35.4 t ADT: 100

S 89

Fair

Over: BLACKTAIL CREEK

SOUTH DILLON, Beaverhead, MT

Built 1983 Load: 35.4 t ADT: 1,770

I 15

Fair

Over: SEP RR

1.2M N MONIDA, Beaverhead, MT

Built 2015 Load: 36.3 t ADT: 1,643

CO RD 002 FH 73

Fair

Over: WISE RIVER 019

17M S WISE RIVER, Beaverhead, MT

Built 1987 Load: 36.3 t ADT: 289

S 43

Fair

Over: WISE RIVER

WISE RIVER, Beaverhead, MT

Built 1970 Load: 36.3 t ADT: 576

I 15

Fair

Over: SEP RR

1.9M S LIMA, Beaverhead, MT

Built 1980 Load: 37.2 t ADT: 1,643

S 89

Fair

Over: RR

SOUTH DILLON, Beaverhead, MT

Built 1983 Load: 37.2 t ADT: 1,770

MT HWY 91

Fair

Over: BEAVERHEAD RIVER

3M SW DILLON, Beaverhead, MT

Built 1945 Load: 37.3 t ADT: 582

FDR 1278

Fair

Over: PINTLAR CREEK

NO DATA ENTERED, Beaverhead, MT

Built 1981 Load: 37.6 t ADT: 15

LAKNAR LN

Fair

Over: BEAVERHEAD RIVER 095

1M N DILLON, Beaverhead, MT

Built 2001 Load: 38.3 t ADT: 2,823

FDR 192

Fair

Over: ROCK CR

ROCK CR, Beaverhead, MT

Built 1986 Load: 38.6 t ADT: 40

MINER LAKE RD

Fair

Over: BIG HOLE RIVER 093

2M SW JACKSON, Beaverhead, MT

Built 2004 Load: 39.9 t ADT: 100

ANDERSON LANE

Fair

Over: WEST SIDE CANAL 1

6M NE DILLON, Beaverhead, MT

Built 2012 Load: 39.9 t ADT: 53

NFSR #1137

Fair

Over: JOHNSON CR.

BENDER CR., Beaverhead, MT

Built 2002 Load: 40.2 t ADT: 15

RED ROCK ROAD

Fair

Over: BIG SHEEP CREEK 026

SE DELL, Beaverhead, MT

Built 1931 Load: 41.7 t ADT: 100

I 15

Fair

Over: BEAVERHEAD RIVER

3.1M S DILLON, Beaverhead, MT

Built 1982 Load: 43.5 t ADT: 2,826

I 15

Fair

Over: BIG SHEEP CREEK

0.6M S DELL, Beaverhead, MT

Built 1971 Load: 48.1 t ADT: 1,803

I 15

Fair

Over: BIG SHEEP CREEK

0.6M S DELL, Beaverhead, MT

Built 1971 Load: 48.1 t ADT: 1,803

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