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)

Sort:

I 90

Over: INT TOLUCA COUNTY ROAD

11.2M W HARDIN, Big Horn, MT

Built 1972 ADT: 100

I 90

Over: INT TOLUCA COUNTY ROAD

11.2M W HARDIN, Big Horn, MT

Built 1972 ADT: 100

IRR - I 90

Over: SARPY ROAD-S 384

1.2M E HARDIN, Big Horn, MT

Built 1971 ADT: 511

IRR - I 90

Over: SARPY ROAD-S 384

1.2M E HARDIN, Big Horn, MT

Built 1971 ADT: 511

IRR - I 90

Over: INT DUNMORE

5.6M N CROW AGENCY, Big Horn, MT

Built 1959 ADT: 100

IRR - I 90

Over: INT DUNMORE

5.6M N CROW AGENCY, Big Horn, MT

Built 1959 ADT: 100

IRR - I 90

Over: INT CROW AGENCY

CROW AGENCY, Big Horn, MT

Built 1959 ADT: 100

IRR - I 90

Over: INT CROW AGENCY

CROW AGENCY, Big Horn, MT

Built 1959 ADT: 100

IRR - I 90

Over: INT GARRYOWEN

5.6M S CROW AGENCY, Big Horn, MT

Built 1976 ADT: 944

IRR - I 90

Over: INT GARRYOWEN

5.6M S CROW AGENCY, Big Horn, MT

Built 1976 ADT: 944

IRR - I 90

Over: SEP RENO CREEK ROAD

8.7M S CROW AGENCY, Big Horn, MT

Built 1980 ADT: 100

IRR - I 90

Over: SEP RENO CREEK ROAD

8.7M S CROW AGENCY, Big Horn, MT

Built 1980 ADT: 100

IRR - I 90

Over: SEP COUNTY ROAD

10.5M N LODGE GRASS, Big Horn, MT

Built 1980 ADT: 100

IRR - I 90

Over: SEP COUNTY ROAD

10.5M N LODGE GRASS, Big Horn, MT

Built 1980 ADT: 100

IRR - I 90

Over: INT LODGE GRASS

LODGE GRASS, Big Horn, MT

Built 1980 ADT: 100

IRR - I 90

Over: INT LODGE GRASS

LODGE GRASS, Big Horn, MT

Built 1980 ADT: 100

IRR - I 90

Over: SEP LOCAL ROAD

1.9M S LODGE GRASS, Big Horn, MT

Built 1985 ADT: 100

IRR - I 90

Over: SEP LOCAL ROAD

1.9M S LODGE GRASS, Big Horn, MT

Built 1985 ADT: 100

IRR - I 90

Over: INT WYOLA-S 457

WYOLA, Big Horn, MT

Built 1985 ADT: 80

IRR - I 90

Over: INT WYOLA-S 457

WYOLA, Big Horn, MT

Built 1985 ADT: 80

IRR - I 90

Over: INT ABERDEEN

ABERDEEN, Big Horn, MT

Built 1985 ADT: 126

IRR - I 90

Over: INT ABERDEEN

ABERDEEN, Big Horn, MT

Built 1985 ADT: 126

FLY CREEK RD

Over: INT BALLANTINE-I 90 003

16M W HARDIN, Big Horn, MT

Built 1972 ADT: 3,688

N TORSKE OVERPASS

Over: SEP I 90 00

3M NW HARDIN, Big Horn, MT

Built 1971 ADT: 3,688

RANCH ACCESS OP

Over: SEP I-90 001

2M S ABERDEEN, Big Horn, MT

Built 1985 ADT: 3,953

IRR - US 212

Over: INT CUSTER BATLFLD I 90

1M S CROW AGENCY, Big Horn, MT

Built 1959 ADT: 2,439

IRR-S 47-3RD ST E

Over: INT E HARDIN I 90

HARDIN-3RD ST E, Big Horn, MT

Built 1971 ADT: 4,249

IRR-S 47

Over: INT W HARDIN I 90

HARDIN-N CRAWFORD AVE, Big Horn, MT

Built 1970 ADT: 3,688

COUNTY ROAD 143

Over: UNNAMED CREEK 059

34M E DECKER, Big Horn, MT

Built 1950 Load: 6.4 t ADT: 100

UPPER RD

Over: TWO LEGGIN`S CANAL 005

8M NW HARDIN, Big Horn, MT

Built 1950 Load: 7.3 t ADT: 100

IRR - I 90

Over: BIGHORN RIVER

HARDIN, Big Horn, MT

Built 1971 Load: 12.6 t ADT: 4,249

IRR BIA RTE 14

Over: BIG SHOULDER CREEK

7.2KM SOUTH OF CROW AGNCY, Big Horn, MT

Built 1963 Load: 14.0 t ADT: 440

IRR - I 90

Over: OWL CREEK

2.5M S LODGE GRASS, Big Horn, MT

Built 1985 Load: 15.4 t ADT: 1,978

PINE RIDGE RD

Over: TWO LEGGIN`S CANAL 014

4M NW HARDIN, Big Horn, MT

Built 1993 Load: 15.4 t ADT: 100

SARPY BASIN RD

Over: E FORK SARPY CREEK 028

30M E HARDIN, Big Horn, MT

Built 1971 Load: 16.3 t ADT: 100

BALA ST

Over: LITTLE BIGHORN RIVER 069

CROW AGENCY, Big Horn, MT

Built 1958 Load: 20.0 t ADT: 100

IRR - S 313

Over: INDIAN SERVICE CANAL

10M SW ST XAVIER, Big Horn, MT

Built 1962 Load: 20.0 t ADT: 500

IRR - I 90

Over: LITTLE BIGHORN RIVER

8M S CROW AGENCY, Big Horn, MT

Built 1956 Load: 20.4 t ADT: 2,055

LITTLE HORN RD

Over: LITTLE BIGHORN RIVER 072

8M SW WYOLA, Big Horn, MT

Built 1952 Load: 20.8 t ADT: 243

IRR BIA RTE 16

Over: LODGE GRASS CREEK

AT LODGE GRASS, Big Horn, MT

Built 1962 Load: 21.8 t ADT: 300

IRR - I 90

Over: LITTLE BIGHORN RIVER

2.5M S CROW AGENCY, Big Horn, MT

Built 1956 Load: 23.6 t ADT: 2,439

IRR - S 314

Over: ROSEBUD CREEK

11M SW BUSBY, Big Horn, MT

Built 1983 Load: 23.6 t ADT: 386

SARPY CREEK RD

Over: LITTLE BIGHORN RIVER

3M E HARDIN, Big Horn, MT

Built 1962 Load: 23.6 t ADT: 511

IRR BIA RTE 91

Over: ROTTEN GRASS CREEK

0.8 KM SW OF ST. XAVIER, Big Horn, MT

Built 1970 Load: 24.5 t ADT: 350

IRR BIA RTE 205

Over: LITTLE BIG HORN RIVER

0.4KM NW OF JCT 205 & 418, Big Horn, MT

Built 1993 Load: 24.5 t ADT: 80

IRR - S 313

Over: BIGHORN RIVER

7M SW HARDIN, Big Horn, MT

Built 1958 Load: 24.5 t ADT: 1,049

SARPY BASIN RD

Over: SARPY CREEK 033

24M E HARDIN, Big Horn, MT

Built 1981 Load: 25.3 t ADT: 100

I 90

Over: RR

14.9M W HARDIN, Big Horn, MT

Built 1972 Load: 25.4 t ADT: 3,688

I 90

Over: RR

14.9M W HARDIN, Big Horn, MT

Built 1972 Load: 25.4 t ADT: 3,688

IRR - I 90

Over: LITTLE BIGHORN RIVER

2.5M S CROW AGENCY, Big Horn, MT

Built 1976 Load: 25.4 t ADT: 2,439

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.