Musselshell County, MT

25 public highway bridges

Musselshell County Bridge Snapshot

Musselshell County, Montana contains 25 public highway bridges in the FHWA National Bridge Inventory. Roughly 52% are rated “Good,” 44% “Fair,” 4% “Poor,” and 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.

25
Total Bridges
52%
Good
4%
Poor
4%
Structurally Deficient

Condition Distribution

Good
52% (13)
Fair
44% (11)
Poor
4% (1)
SD
4% (1)

All Bridges (25)

4-H RD

Fair

Over: MUSSELSHELL RIVER 008

SE ROUNDUP, Musselshell, MT

Built 1970 Load: 9.0 t ADT: 528

DEAN CREEK RD

Fair

Over: MUSSELSHELL RIVER 004

15M SW ROUNDUP, Musselshell, MT

Built 1988 Load: 17.2 t ADT: 100

MUSSELSHELL RD

Fair

Over: MUSSELSHELL RIVER 015

6M W MUSSELSHELL, Musselshell, MT

Built 1916 Load: 22.6 t ADT: 34

US 12

Fair

Over: WILLOW CREEK

4M NE ROUNDUP, Musselshell, MT

Built 1999 Load: 25.4 t ADT: 573

HARVEY RD

Fair

Over: MUSSELSHELL RIVER 024

3M SW MELSTONE, Musselshell, MT

Built 2013 Load: 26.2 t ADT: 100

COUNTY ROAD 548

Fair

Over: MUSSELSHELL RIVER 025

ROUNDUP, Musselshell, MT

Built 2013 Load: 26.2 t ADT: 100

GOULDING CREEK RD

Fair

Over: MUSSELSHELL RIVER

7M SW ROUNDUP, Musselshell, MT

Built 1949 Load: 26.3 t ADT: 246

GOULDING CREEK RD

Fair

Over: HARPER`S COULEE

11M SW ROUNDUP, Musselshell, MT

Built 1954 Load: 28.1 t ADT: 136

US 12

Fair

Over: DEAN CREEK

6M E LAVINA, Musselshell, MT

Built 1935 Load: 29.0 t ADT: 438

US 12

Fair

Over: CURRANT CREEK

7M SW ROUNDUP, Musselshell, MT

Built 1936 Load: 29.9 t ADT: 438

US 12

Fair

Over: DRAINAGE

3M SW MELSTONE, Musselshell, MT

Built 2003 Load: 39.9 t ADT: 358

MAJERUS RD

Good

Over: BULL MTN RR 023

14M SE ROUNDUP, Musselshell, MT

Built 2009 Load: 14.5 t ADT: 36

NUMBER 4 RD

Good

Over: MUSSLESHELL RIVER 011

1M E ROUNDUP, Musselshell, MT

Built 1995 Load: 24.5 t ADT: 100

US 87

Good

Over: RAZOR CREEK

16M S KLEIN, Musselshell, MT

Built 1995 Load: 27.2 t ADT: 2,497

MELSTONE-CUSTER RD

Good

Over: MUSSELSHELL RIVER 017

1M SE MELSTONE, Musselshell, MT

Built 1992 Load: 28.1 t ADT: 115

S MUSSELSHELL RD

Good

Over: MUSSELSHELL RIVER

MUSSELSHELL, Musselshell, MT

Built 1960 Load: 29.0 t ADT: 156

US 87

Good

Over: MUSSELSHELL RIVER

ROUNDUP, Musselshell, MT

Built 1996 Load: 30.8 t ADT: 2,677

US 87

Good

Over: SOUTH WILLOW CREEK

7M N ROUNDUP, Musselshell, MT

Built 1976 Load: 30.8 t ADT: 1,155

US 12

Good

Over: STOCKPASS-DRAINAGE

3M NE MUSSELSHELL, Musselshell, MT

Built 2003 Load: 31.8 t ADT: 358

FARREL ST

Good

Over: HALF BREED CREEK

KLEIN, Musselshell, MT

Built 2021 Load: 35.4 t ADT: 100

US 12

Good

Over: HORSETHIEF CREEK

3M SW ROUNDUP, Musselshell, MT

Built 2015 Load: 35.4 t ADT: 665

US 87

Good

Over: PARK COULEE

16M S KLEIN, Musselshell, MT

Built 1995 Load: 39.9 t ADT: 2,497

US 12

Good

Over: DRAINAGE

12M W ROUNDUP, Musselshell, MT

Built 2006 Load: 99.9 t ADT: 438

US 12

Good

Over: DRAINAGE

1M N MUSSELSHELL, Musselshell, MT

Built 2003 Load: 99.9 t ADT: 477

HARVEY RD

Poor

Over: MUSSELSHELL RIVER 018

3M SW MELSTONE, Musselshell, MT

Built 1916 Load: 18.1 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