Custer County, MT

71 public highway bridges

Custer County Bridge Snapshot

Custer County, Montana contains 71 public highway bridges in the FHWA National Bridge Inventory. Roughly 11.3% are rated “Good,” 70.4% “Fair,” 1.4% “Poor,” and 1.4% 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.

71
Total Bridges
11.3%
Good
1.4%
Poor
1.4%
Structurally Deficient

Condition Distribution

Good
11.3% (8)
Fair
70.4% (50)
Poor
1.4% (1)
SD
1.4% (1)

All Bridges (71)

PACIFIC AVE

Fair

Over: TONGUE RIVER 056

SW EDGE MILES CITY, Custer, MT

Built 2006 Load: 39.0 t ADT: 100

I 94

Fair

Over: COTTONWOOD CREEK

21M NE MILES CITY, Custer, MT

Built 1971 Load: 40.2 t ADT: 2,111

I 94

Fair

Over: COTTONWOOD CREEK

21M NE MILES CITY, Custer, MT

Built 1971 Load: 40.2 t ADT: 2,111

I 94

Fair

Over: TONGUE RIVER

1M S MILES CITY, Custer, MT

Built 1961 Load: 41.7 t ADT: 4,570

POWDERVILLE RD

Fair

Over: PUMPKIN CREEK 002

31M S MILES CITY, Custer, MT

Built 1981 Load: 43.5 t ADT: 47

TRAIL CREEK RD

Fair

Over: MIZPAH CREEK 086

27M SE MILES CITY, Custer, MT

Built 1981 Load: 47.2 t ADT: 56

LOWER RD

Fair

Over: MUSTER CREEK 001

1M SW KINSEY, Custer, MT

Built 1994 Load: 51.7 t ADT: 100

S 59

Fair

Over: PUMPKIN CREEK

14M SE MILES CITY, Custer, MT

Built 1962 Load: 53.5 t ADT: 673

I 94

Fair

Over: LIGNITE CREEK

8M SW MILES CITY, Custer, MT

Built 1964 Load: 89.8 t ADT: 4,646

I 94

Fair

Over: COAL CREEK

7M SW MILES CITY, Custer, MT

Built 1963 Load: 89.8 t ADT: 4,646

S 59

Fair

Over: MILL CREEK-STOCKPASS

7M SE MILES CITY, Custer, MT

Built 1986 Load: 89.8 t ADT: 952

I 94

Fair

Over: JONES CREEK-STOCKPASS

8M NE MILES CITY, Custer, MT

Built 1962 Load: 99.9 t ADT: 4,494

SHEEP CREEK RD

Good

Over: SHEEP CREEK

36M E MILES CITY, Custer, MT

Built 2023 ADT: 22

FRONTAGE ROAD 005

Good

Over: MOON CREEK 093

9M SW MILES CITY, Custer, MT

Built 2013 Load: 18.1 t ADT: 100

WHITNEY CR RD

Good

Over: O`FALLON CREEK

ISMAY-WHITNEY CR RD, Custer, MT

Built 1990 Load: 28.1 t ADT: 38

US 12

Good

Over: BENSLEY CREEK

6M E MILES CITY, Custer, MT

Built 1999 Load: 30.8 t ADT: 643

TRAIL CREEK RD

Good

Over: MASON CREEK 059

49M E MILES CITY, Custer, MT

Built 2016 Load: 36.3 t ADT: 100

TRAIL CREEK RD

Good

Over: STREVELL CREEK 042

25M SE MILES CITY, Custer, MT

Built 2018 Load: 39.9 t ADT: 56

S 59

Good

Over: NORTH WOMAN CREEK

9M SE MILES CITY, Custer, MT

Built 1986 Load: 89.8 t ADT: 952

I 94

Good

Over: VEHICLE PASS

13M NE MILES CITY, Custer, MT

Built 1986 Load: 99.9 t ADT: 4,570

FRONTAGE ROAD 205

Poor

Over: SNELL CREEK 073

17M SW MILES CITY, Custer, MT

Built 1928 Load: 20.9 t ADT: 100

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