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)

Sort:

BANNACK BENCH RD

Over: HORSE PRAIRE CREEK 010

1M N GRANT, Beaverhead, MT

Built 1981 Load: 4.5 t ADT: 100

TAYLOR CR RD

Over: GRASSHOPPER CREEK 004

21M W DILLON, Beaverhead, MT

Built 1986 Load: 4.5 t ADT: 100

LITTLE LAKE CR RD

Over: BIG HOLE RIVER 087

3M NW JACKSON, Beaverhead, MT

Built 1986 Load: 4.5 t ADT: 100

LIMA DAM RD

Over: RED ROCK RIVER 007

6M E LIMA, Beaverhead, MT

Built 1982 Load: 4.5 t ADT: 116

OLD STAGE RD

Over: CANYON DITCH

E BARRETTS INT, Beaverhead, MT

Built 1982 Load: 4.5 t ADT: 292

SAGE CREEK RD

Over: RED ROCK RIVER 034

1M N DELL, Beaverhead, MT

Built 1977 Load: 4.5 t ADT: 70

GRAVLEY RD

Over: RED ROCK RIVER 085

4M NW LIMA, Beaverhead, MT

Built 1982 Load: 4.5 t ADT: 61

ASHBOUGH TRAIL

Over: RED ROCK RIVER 086

KIDD, Beaverhead, MT

Built 1909 Load: 5.4 t ADT: 15

ANDERSON LN

Over: BEAVERHEAD RIVER 071

5M NE DILLON, Beaverhead, MT

Built 1930 Load: 5.4 t ADT: 53

ROE LN

Over: RED ROCK 121

W RED ROCK, Beaverhead, MT

Built 1913 Load: 6.4 t ADT: 4

STEEL BRIDGE LN

Over: RED ROCK RIVER 084

4M NW LIMA, Beaverhead, MT

Built 1915 Load: 6.4 t ADT: 74

CORINNE TRAIL

Over: HORSE PRAIRIE CREEK 043

3M E GRANT, Beaverhead, MT

Built 2022 Load: 9.1 t ADT: 100

COUNTY ROAD 111

Over: HORSE PRAIRIE CREEK 031

8M W GRANT, Beaverhead, MT

Built 1920 Load: 9.1 t ADT: 100

STONE CREEK RD

Over: EAST BENCH CANAL 003

6M NE DILLON, Beaverhead, MT

Built 1962 Load: 10.9 t ADT: 100

LITTLE LAKE CR RD

Over: BIG HOLE RIVER 088

3M NW JACKSON, Beaverhead, MT

Built 1974 Load: 13.6 t ADT: 100

CARRIGAN LN

Over: EAST BENCH CANAL 061

4M E BARRETTS INT, Beaverhead, MT

Built 1962 Load: 14.5 t ADT: 100

CO RD 002 FH 73

Over: WISE RIVER 017

22M S WISE RIVER, Beaverhead, MT

Built 1987 Load: 14.6 t ADT: 289

NO DATA ENTERED

Over: BIRCH CR

BIRCH CR, Beaverhead, MT

Built 1953 Load: 16.5 t ADT: 40

FDR 182

Over: MINER CR

MINER CR, Beaverhead, MT

Built 1947 Load: 17.2 t ADT: 50

RiceBran access Rd

Over: East Bench Canal

11 mi NW of Dillon MT, Beaverhead, MT

Built 1962 Load: 18.8 t ADT: 20

FDR 945

Over: RUBY CR

RUBY CR, Beaverhead, MT

Built 1968 Load: 18.8 t ADT: 20

BLOODY D--- ROAD

Over: BLOODY D--- CR

BLOODY D--- CR, Beaverhead, MT

Built 1961 Load: 19.8 t ADT: 2

FS ROUTE 83

Over: BIG HOLE RIVER

BIG HOLE RIVER, Beaverhead, MT

Built 1950 Load: 20.4 t ADT: 50

FDR 90

Over: STEEL CR

STEEL CR, Beaverhead, MT

Built 1954 Load: 20.7 t ADT: 40

FDR 1203

Over: TIE CREEK

TIE CR, Beaverhead, MT

Built 1964 Load: 21.4 t ADT: 15

I 15

Over: RED ROCK RIVER

6.2M S CLARK CANYON DAM, Beaverhead, MT

Built 1981 Load: 21.8 t ADT: 2,089

NISSEN LN

Over: EAST BENCH CANAL 001

3M E DILLON, Beaverhead, MT

Built 1962 Load: 21.8 t ADT: 100

MT-43 FH 20

Over: TRAIL CREEK

12M W WISDOM, Beaverhead, MT

Built 1961 Load: 21.8 t ADT: 431

S 324

Over: CLARK CANYON DAM SPLWY

CLARK CANYON DAM, Beaverhead, MT

Built 1962 Load: 21.8 t ADT: 389

I 15

Over: SEP RR

1.2M N MONIDA, Beaverhead, MT

Built 1981 Load: 22.7 t ADT: 1,643

I 15

Over: BEAVERHEAD RIVER

8M N CLARK CANYON DAM, Beaverhead, MT

Built 1965 Load: 22.7 t ADT: 2,210

S 43 FH 20

Over: RUBY CREEK

11M W WISDOM, Beaverhead, MT

Built 1961 Load: 22.7 t ADT: 431

S 43

Over: STEEL CREEK

1M N WISDOM, Beaverhead, MT

Built 1956 Load: 22.7 t ADT: 330

FDR 1203

Over: JOHNSON CR

JOHNSON CR, Beaverhead, MT

Built 1968 Load: 23.0 t ADT: 25

S 41

Over: STONE CREEK

9M NE DILLON, Beaverhead, MT

Built 1949 Load: 23.6 t ADT: 2,326

VAN HOUTEN ROAD

Over: PIONEER CR

PIONEER CR, Beaverhead, MT

Built 1981 Load: 24.0 t ADT: 25

SWEETWATER RD

Over: EAST BENCH CANAL 060

3M E DILLON, Beaverhead, MT

Built 1962 Load: 24.5 t ADT: 100

NO DATA ENTERED

Over: BIG LAKE

BIG LAKE CR, Beaverhead, MT

Built 1971 Load: 25.3 t ADT: 40

I 15

Over: BEAVERHEAD RIVER

8M N CLARK CANYON DAM, Beaverhead, MT

Built 1981 Load: 25.4 t ADT: 2,210

STODDARD DR

Over: EAST BENCH CANAL 002

8M NE DILLON, Beaverhead, MT

Built 1962 Load: 25.4 t ADT: 100

MT HWY 91

Over: POINDEXTER SLOUGH

3M SW DILLON, Beaverhead, MT

Built 1936 Load: 25.4 t ADT: 582

ROAD 944

Over: MOOSE CREEK

NO DATA ENTERED, Beaverhead, MT

Built 1974 Load: 26.2 t ADT: 15

BIG LAKE CR RD

Over: BIG HOLE RIVER 091

8M N JACKSON, Beaverhead, MT

Built 1976 Load: 26.3 t ADT: 100

BURMA RD

Over: BIG HOLE RIVER 073

1M SE GLEN, Beaverhead, MT

Built 2000 Load: 26.3 t ADT: 100

SWAMP CR ROAD

Over: BIG SWAMP CR

BIG SWAMP CR, Beaverhead, MT

Built 1968 Load: 26.6 t ADT: 15

I 15

Over: BEAVERHEAD RIVER

3.1M S DILLON, Beaverhead, MT

Built 1982 Load: 27.2 t ADT: 2,826

HIGH BRIDGE RD

Over: BEAVERHEAD RIVER 125

5M N CLARK CANYON DAM, Beaverhead, MT

Built 1980 Load: 27.2 t ADT: 100

WHITE LN

Over: EAST BENCH CANAL 102

2M SE DILLON, Beaverhead, MT

Built 1962 Load: 27.2 t ADT: 100

S 43

Over: SMART CREEK

WISE RIVER, Beaverhead, MT

Built 1970 Load: 27.2 t ADT: 576

S 324

Over: MEDICINE LODGE CREEK

5M E GRANT, Beaverhead, MT

Built 1963 Load: 27.2 t ADT: 185

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

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026