Big Horn County, MT

136 public highway bridges

Big Horn County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Big Horn County, Montana contains 136 public highway bridges. Roughly 25% are rated “Good,” 49.3% “Fair,” and 5.1% “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.

136
Total Bridges
25%
Good
49.3%
Fair
5.1%
Poor Condition

Condition Distribution

Good
25% (34)
Fair
49.3% (67)
Poor
5.1% (7)

All Bridges (136)

VANZANDT RD

Good

Over: TWO LEGGIN`S CANAL 047

1M W HARDIN, Big Horn, MT

Built 1994 Load: 23.6 t ADT: 44

IRR BIA RTE 210

Good

Over: WEST FORK MUDDY CREEK

17.4 KM SW OF LAME DEER, Big Horn, MT

Built 1977 Load: 24.5 t ADT: 80

RAIL RD

Good

Over: TWO LEGGIN'S CANAL

1M SW HARDIN, Big Horn, MT

Built 2021 Load: 24.5 t ADT: 100

PERITSA CREEK RD

Good

Over: TWO LEGGIN`S CANAL 048

1M W HARDIN, Big Horn, MT

Built 2014 Load: 24.5 t ADT: 100

IRR - S 313

Good

Over: TWO LEGGIN CANAL

5M S HARDIN, Big Horn, MT

Built 1989 Load: 24.5 t ADT: 1,049

FRONTAGE ROAD 332

Good

Over: LODGE GRASS CREEK 070

S LODGE GRASS, Big Horn, MT

Built 2015 Load: 25.4 t ADT: 50

BLACK BRIDGE RD

Good

Over: LITTLE BIGHORN RIVER 024

3M SW WYOLA, Big Horn, MT

Built 1998 Load: 26.3 t ADT: 100

SARPY CREEK RD

Good

Over: TULLOCK CREEK

16M E HARDIN, Big Horn, MT

Built 1968 Load: 26.3 t ADT: 199

IRR - I 90

Good

Over: LITTLE BIGHORN RIVER

8M S CROW AGENCY, Big Horn, MT

Built 1980 Load: 28.1 t ADT: 2,055

LITTLE HORN RD

Good

Over: LITTLE BIGHORN RIVER 073

11M SW WYOLA, Big Horn, MT

Built 1996 Load: 28.1 t ADT: 243

IRR - S 314

Good

Over: DAVIS CREEK

3M SW BUSBY, Big Horn, MT

Built 1983 Load: 28.1 t ADT: 386

IRR - S 451

Good

Over: LITTLE BIGHORN RIVER

3M S GARRYOWEN INT, Big Horn, MT

Built 1980 Load: 28.1 t ADT: 944

BACK LOOP RD

Good

Over: LITTLE BIGHORN RIVER 023

1M N WYOLA, Big Horn, MT

Built 1986 Load: 29.9 t ADT: 100

OLD HWY 87

Good

Over: PERITSA CREEK

6M W HARDIN, Big Horn, MT

Built 2020 Load: 30.8 t ADT: 561

IRR - S 451

Good

Over: PASS CREEK

3M S WYOLA, Big Horn, MT

Built 1949 Load: 30.8 t ADT: 297

HWY 463

Good

Over: ROTTEN GRASS CREEK 008

15M SW LODGE GRASS, Big Horn, MT

Built 1966 Load: 31.1 t ADT: 72

IRR BIA RTE 209

Good

Over: ROSEBUD CREEK

8.1 KM WEST OF LAME DEER, Big Horn, MT

Built 1971 Load: 32.7 t ADT: 100

IRR BIA RTE 209

Good

Over: ROSEBUD CREEK

0.4 MILES WEST OF HWY 212, Big Horn, MT

Built 2019 Load: 32.7 t ADT: 100

IRR - S 313

Good

Over: TWO LEGGIN CANAL

7M SW HARDIN, Big Horn, MT

Built 1991 Load: 32.7 t ADT: 1,049

IRR - US 212

Good

Over: ROSEBUD CREEK

BUSBY, Big Horn, MT

Built 1992 Load: 33.6 t ADT: 2,542

S 47

Good

Over: LOW LINE DITCH

5M N HARDIN, Big Horn, MT

Built 1989 Load: 34.0 t ADT: 636

IRR - S 313

Good

Over: WILLIAMS COULEE

1M S HARDIN, Big Horn, MT

Built 2021 Load: 35.4 t ADT: 1,049

LITTLE HORN RD

Good

Over: PASS CREEK 071

1M SW WYOLA, Big Horn, MT

Built 2004 Load: 35.4 t ADT: 243

IRR BIA RTE 73

Good

Over: BIG HORN CANAL

4.5 KM SE OF ST. XAVIER, Big Horn, MT

Built 1986 Load: 37.2 t ADT: 200

I 90

Good

Over: FLY CREEK

16.8M W HARDIN, Big Horn, MT

Built 1972 Load: 37.2 t ADT: 3,688

I 90

Good

Over: FLY CREEK

16.8M W HARDIN, Big Horn, MT

Built 1972 Load: 38.1 t ADT: 3,688

IRR BIA RTE 1

Good

Over: BIG HORN CANAL

16 KM W OF CROW AGENCY, Big Horn, MT

Built 2001 Load: 38.5 t ADT: 400

IRR BIA RTE 6

Good

Over: LITTLE BIGHORN RIVER

AT CROW AGENCY, Big Horn, MT

Built 1999 Load: 44.5 t ADT: 1,000

IRR - S 313

Good

Over: SOAP CREEK

9M SW ST XAVIER, Big Horn, MT

Built 1963 Load: 49.9 t ADT: 617

RANDALL RD

Poor

Over: TWO LEGGIN`S CANAL 015

3M SW HARDIN, Big Horn, MT

Built 1940 Load: 9.1 t ADT: 100

IRR BIA RTE 209

Poor

Over: ROSEBUD CREEK

8.1 KM WEST OF LAME DEER, Big Horn, MT

Built 1971 Load: 11.3 t ADT: 100

SOAP CREEK RD

Poor

Over: BIG HORN CANAL 009

11M SW ST XAVIER, Big Horn, MT

Built 1946 Load: 11.5 t ADT: 63

IRR BIA RTE 205

Poor

Over: UPPER LODGE GRASS CREEK

6.8 KM NW JCT 205 & 418, Big Horn, MT

Built 1994 Load: 13.1 t ADT: 12

OLD HWY 87

Poor

Over: TWO LEGGIN'S CANAL 0

1M W HARDIN, Big Horn, MT

Built 1931 Load: 20.9 t ADT: 561

IRR BIA RTE 226

Poor

Over: BLACK CANYON CREEK

51.5 KM SW OF LODGE GRASS, Big Horn, MT

Built 1965 Load: 30.3 t ADT: 5

BATTLEFIELD ROAD

Poor

Over: MEDICINE TAIL COULEE

I-90, EXIT 510, EAST ON U, Big Horn, MT

Built 1938 Load: 83.4 t ADT: 150

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.