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)

Sort:

I 94

Over: INT P-23 BROADUS

SE EDGE MILES CITY, Custer, MT

Built 2019 ADT: 1,894

I 94

Over: INT P-23 BROADUS

SE EDGE MILES CITY, Custer, MT

Built 2020 ADT: 3,788

I 94

Over: SEP CEMETERY RD

S EDGE MILES CITY, Custer, MT

Built 1961 ADT: 689

I 94

Over: SEP CEMETERY RD

S EDGE MILES CITY, Custer, MT

Built 1974 ADT: 689

I 94

Over: INT DIAMOND RING

21M NE MILES CITY, Custer, MT

Built 1971 ADT: 100

I 94

Over: INT DIAMOND RING

21M NE MILES CITY, Custer, MT

Built 1971 ADT: 100

VALLEY DR E

Over: INT SHIRLEY-I 94 006

10M NE MILES CITY, Custer, MT

Built 1984 ADT: 2,111

FRONTAGE ROAD 005

Over: INT RADAR BASE-I 94 004

8M SW MILES CITY, Custer, MT

Built 1961 ADT: 2,323

FRONTAGE ROAD 201

Over: INT MOON CREEK-I 94 005

10M SW MILES CITY, Custer, MT

Built 1962 ADT: 2,323

US 94

Over: INT W MILES CITY-I 94

3M SW MILES CITY, Custer, MT

Built 1961 ADT: 2,285

US 94

Over: TONGUE RIVER

SW EDGE MILES CITY, Custer, MT

Built 2007 ADT: 100

US 94

Over: INT BAKER-I 94

2M NE MILES CITY, Custer, MT

Built 1974 ADT: 2,481

CEMETARY RD

Over: T AND Y CANAL 065

1M S MILES CITY, Custer, MT

Built 1978 Load: 9.1 t ADT: 551

DEADMAN RD

Over: N FORK SUNDAY CREEK 011

10M NW MILES CITY, Custer, MT

Built 1913 Load: 13.6 t ADT: 100

TRAIL CREEK RD

Over: POWDER RIVER 061

41M E MILES CITY, Custer, MT

Built 1926 Load: 18.8 t ADT: 100

TUSLER RD

Over: YELLOWSTONE RIVER 094

9M NE MILES CITY, Custer, MT

Built 1907 Load: 21.8 t ADT: 102

POWDERVILLE RD

Over: MIZPAH CREEK 020

43M SE MILES CITY, Custer, MT

Built 1931 Load: 22.7 t ADT: 47

S 59

Over: SOUTH FORK SUNDAY CREEK

3M NW MILES CITY, Custer, MT

Built 1930 Load: 22.7 t ADT: 1,465

S 332

Over: PUMPKIN CREEK

12M S MILES CITY, Custer, MT

Built 1959 Load: 23.6 t ADT: 198

N LOCATE RD

Over: LOCATE CREEK 045

3M N LOCATE, Custer, MT

Built 1901 Load: 24.4 t ADT: 23

FRNTAGE ROAD 81020

Over: COTTONWOOD CREEK 083

19M NE MILES CITY, Custer, MT

Built 1928 Load: 24.5 t ADT: 504

KIRCHER CREEK RD

Over: T AND Y CANAL 032

4M NE MILES CITY, Custer, MT

Built 1938 Load: 24.5 t ADT: 100

POWDERVILLE RD

Over: SPRING CREEK 019

51M S MILES CITY, Custer, MT

Built 1912 Load: 24.5 t ADT: 47

MOON CREEK RD

Over: COTTONWOOD CREEK 044

13M SW MILES CITY, Custer, MT

Built 1928 Load: 25.9 t ADT: 82

S 332

Over: FOSTER CREEK

31M SW MILES CITY, Custer, MT

Built 1952 Load: 25.9 t ADT: 86

FRNTAGE ROAD 81020

Over: MILES CREEK 037

20M NE MILES CITY, Custer, MT

Built 1929 Load: 26.3 t ADT: 504

S 59

Over: YELLOWSTONE RIVER

MILES CITY, Custer, MT

Built 1957 Load: 26.3 t ADT: 3,086

S 59

Over: NORTH FORK SUNDAY CREEK

10M NW MILES CITY, Custer, MT

Built 1963 Load: 26.3 t ADT: 496

I 94

Over: DIXON CREEK

14M NE MILES CITY, Custer, MT

Built 1984 Load: 27.2 t ADT: 2,111

I 94

Over: DIXON CREEK

14M NE MILES CITY, Custer, MT

Built 1984 Load: 27.2 t ADT: 2,111

I 94

Over: SEP ACCESS RD-DRAINAGE

19M NE MILES CITY, Custer, MT

Built 1971 Load: 27.2 t ADT: 2,111

I 94

Over: SEP ACCESS RD-DRAINAGE

19M NE MILES CITY, Custer, MT

Built 1971 Load: 27.2 t ADT: 2,111

CROW ROCK RD

Over: GRIMES CREEK 010

19M NW MILES CITY, Custer, MT

Built 1986 Load: 27.2 t ADT: 100

POWDERVILLE RD

Over: SAND CREEK 003

42M SE MILES CITY, Custer, MT

Built 1980 Load: 27.2 t ADT: 47

US 94

Over: RR

2M SW MILES CITY, Custer, MT

Built 1954 Load: 27.2 t ADT: 1,372

US 12

Over: POWDER RIVER

26M E MILES CITY, Custer, MT

Built 1973 Load: 27.2 t ADT: 549

MOON CREEK RD

Over: TONGUE RIVER 041

43M SW MILES CITY, Custer, MT

Built 1988 Load: 28.1 t ADT: 36

FRONTAGE ROAD 205

Over: COTTONWOOD CREEK 072

14M SW MILES CITY, Custer, MT

Built 1929 Load: 28.1 t ADT: 100

S 59

Over: GRIMES CREEK

17M NW MILES CITY, Custer, MT

Built 1962 Load: 29.0 t ADT: 1,250

I 94

Over: SEP ACCESS ROAD

23M NE MILES CITY, Custer, MT

Built 1971 Load: 29.9 t ADT: 2,110

I 94

Over: SEP ACCESS ROAD

23M NE MILES CITY, Custer, MT

Built 1971 Load: 29.9 t ADT: 2,110

COUNTY ROAD 214

Over: PUMPKIN CREEK 043

6M SW VOLBORG, Custer, MT

Built 1968 Load: 29.9 t ADT: 33

SIGNAL BUTTE RD

Over: T AND Y CANAL 074

3M SE MILES CITY, Custer, MT

Built 2001 Load: 30.6 t ADT: 100

FRNTAGE ROAD 81020

Over: MACKS CREEK 038

23M NE MILES CITY, Custer, MT

Built 1929 Load: 30.8 t ADT: 504

POWDER RIVER RD

Over: ASH CREEK 017

29M SE LOCATE, Custer, MT

Built 1983 Load: 34.5 t ADT: 31

COUNTY ROAD 304

Over: PENNEL CREEK 036

5M NW ISMAY, Custer, MT

Built 1982 Load: 36.2 t ADT: 18

S 59

Over: PUMPKIN CREEK

42M SE MILES CITY, Custer, MT

Built 2003 Load: 36.3 t ADT: 673

I 94

Over: TONGUE RIVER

1M S MILES CITY, Custer, MT

Built 1974 Load: 37.2 t ADT: 2,285

S 489

Over: SUNDAY CREEK

3M N MILES CITY, Custer, MT

Built 1961 Load: 37.3 t ADT: 762

WYTTENHOVE LN

Over: BENSLEY CREEK 030

4M NE MILES CITY, Custer, MT

Built 2016 Load: 39.0 t ADT: 355

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 5, 2026