Fergus County, MT

155 public highway bridges

Fergus County Bridge Snapshot

Fergus County, Montana contains 155 public highway bridges in the FHWA National Bridge Inventory. Roughly 30.3% are rated “Good,” 63.2% “Fair,” 6.5% “Poor,” and 6.5% 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.

155
Total Bridges
30.3%
Good
6.5%
Poor
6.5%
Structurally Deficient

Condition Distribution

Good
30.3% (47)
Fair
63.2% (98)
Poor
6.5% (10)
SD
6.5% (10)

All Bridges (155)

COUNTY ROAD

Good

Over: BEAVER CREEK 143

1M W GLENGARRY, Fergus, MT

Built 2012 Load: 18.1 t ADT: 100

MATOVICH RD

Good

Over: MCDONALD CREEK

5M NE GRASS RANGE, Fergus, MT

Built 2023 Load: 19.4 t ADT: 100

ANDREWS ROAD

Good

Over: DOG CREEK

2M N CHRISTINA, Fergus, MT

Built 2019 Load: 20.9 t ADT: 100

GLENGARY RD

Good

Over: COTTONWOOD CREEK 022

1M N GLENGARRY, Fergus, MT

Built 2013 Load: 23.3 t ADT: 31

COUNTY ROAD 144

Good

Over: DOG CREEK

5M S WINIFRED, Fergus, MT

Built 2022 Load: 23.6 t ADT: 100

JUDITH RIVER RD

Good

Over: JUDITH RIVER 012

10M W WINIFRED, Fergus, MT

Built 2001 Load: 23.6 t ADT: 13

US 87

Good

Over: DRAINAGE

7.125M E HOBSON, Fergus, MT

Built 2021 Load: 27.2 t ADT: 2,202

US 191

Good

Over: BOX ELDER CR

8M NE ROY, Fergus, MT

Built 2002 Load: 28.1 t ADT: 624

S 81

Good

Over: WARM SPRING CREEK

12M SW HILGER, Fergus, MT

Built 2008 Load: 28.1 t ADT: 375

STAFFORD FERRY RD

Good

Over: TAFFY CREEK

7M N WINIFRED, Fergus, MT

Built 2020 Load: 29.0 t ADT: 167

S 547

Good

Over: WOLF CREEK

1M E DENTON, Fergus, MT

Built 1977 Load: 29.0 t ADT: 136

COTTONWOOD CR RD

Good

Over: COTTONWOOD CREEK 140

9M SW LEWISTOWN, Fergus, MT

Built 2013 Load: 29.5 t ADT: 45

COTTONWOOD CUTOFF

Good

Over: COTTONWOOD CREEK 025

6M SW LEWISTOWN, Fergus, MT

Built 2012 Load: 29.5 t ADT: 100

FOREST GROVE RD

Good

Over: S FORK MCDONALD CR

6M SW GRASSRANGE, Fergus, MT

Built 2021 Load: 29.9 t ADT: 146

JOYLAND RD

Good

Over: BIG SPRING CREEK

2M NW LEWISTOWN, Fergus, MT

Built 1999 Load: 29.9 t ADT: 66

FISH HATCHERY RD

Good

Over: BIG SPRING CREEK

5M SE LEWISTOWN, Fergus, MT

Built 1996 Load: 29.9 t ADT: 161

FORT MAGINNIS RD

Good

Over: FORDS CREEK 141

12M N CHEADLE, Fergus, MT

Built 2012 Load: 30.1 t ADT: 100

SCOTT CROSSING

Good

Over: BIG SPRING CREEK 033

5M NW LEWISTOWN, Fergus, MT

Built 2009 Load: 30.1 t ADT: 100

US 87

Good

Over: ROCK CREEK

2M NE MOORE, Fergus, MT

Built 2021 Load: 30.8 t ADT: 2,202

FARREN HILL ROAD

Good

Over: MIDDLE FORK BEAVER CR

6.1M S GLENGARRY, Fergus, MT

Built 2021 Load: 30.8 t ADT: 100

TOGNETTI RD

Good

Over: JUDITH RIVER 037

6M NW MOORE, Fergus, MT

Built 1995 Load: 30.8 t ADT: 100

CARROLL TRAIL

Good

Over: BEAVER CREEK 138

5M S GLENGARRY, Fergus, MT

Built 2013 Load: 31.1 t ADT: 31

SANDROCK RD

Good

Over: WARM SPRINGS CREEK 077

4M NE DANVERS, Fergus, MT

Built 2010 Load: 31.4 t ADT: 100

TIMBERLINE RD

Good

Over: BIG SPRING CREEK 134

4M SE LEWISTOWN, Fergus, MT

Built 2012 Load: 31.4 t ADT: 100

HORSE RANCH RD

Good

Over: BOX ELDER CREEK 120

NW FERGUS, Fergus, MT

Built 1962 Load: 31.7 t ADT: 100

US 191

Good

Over: DAWKINS BRANCH

3M SW MOORE, Fergus, MT

Built 2021 Load: 31.8 t ADT: 2,094

COTTONWOOD CR RD

Good

Over: COTTONWOOD CREEK 027

7M SW LEWISTOWN, Fergus, MT

Built 2012 Load: 32.1 t ADT: 45

CHRISTINA ST W

Good

Over: DOG CREEK

CHRISTINA, Fergus, MT

Built 2020 Load: 32.7 t ADT: 100

BAIN STREET

Good

Over: WOLF CREEK

DENTON-BAIN ST, Fergus, MT

Built 2022 Load: 32.7 t ADT: 100

MABEE RD

Good

Over: BLOOD CREEK 040

3M N ROY, Fergus, MT

Built 2013 Load: 32.7 t ADT: 100

S 200

Good

Over: MCDONALD CREEK

4M NE GRASS RANGE, Fergus, MT

Built 1967 Load: 32.7 t ADT: 726

FOREST GROVE RD

Good

Over: S FORK MCDONALD CR 072

GRASSRANGE, Fergus, MT

Built 2011 Load: 33.4 t ADT: 146

S 19

Good

Over: SOUTH FORK BEAR CREEK

12M N GRASS RANGE, Fergus, MT

Built 1960 Load: 34.5 t ADT: 473

STONE BARN LN

Good

Over: ROCK CREEK 142

10M S MOORE, Fergus, MT

Built 2012 Load: 36.9 t ADT: 100

P 81

Good

Over: JUDITH RIVER

11M SE DENTON, Fergus, MT

Built 2020 Load: 37.2 t ADT: 263

P-81

Good

Over: WARM SPRING CREEK

13M SW HILGER, Fergus, MT

Built 2020 Load: 37.2 t ADT: 375

S 19

Good

Over: MCDONALD CREEK

2M N GRASS RANGE, Fergus, MT

Built 1962 Load: 37.2 t ADT: 586

S-81

Good

Over: WOLF CREEK

DENTON, Fergus, MT

Built 2022 Load: 38.1 t ADT: 369

S 19

Good

Over: FORDS CREEK

7M N GRASS RANGE, Fergus, MT

Built 1962 Load: 39.0 t ADT: 586

S 19

Good

Over: CHIPPEWA CREEK

3M N GRASS RANGE, Fergus, MT

Built 1962 Load: 41.7 t ADT: 586

S 19

Good

Over: LITTLE BOX ELDER CREEK

9M N GRASS RANGE, Fergus, MT

Built 1962 Load: 42.6 t ADT: 586

US 87

Good

Over: BEAVER CREEK

7M SW LEWISTOWN, Fergus, MT

Built 2009 Load: 43.5 t ADT: 2,443

S 19

Good

Over: NORTH FORK BEAR CREEK

11M SE ROY, Fergus, MT

Built 1960 Load: 44.5 t ADT: 473

US 87

Good

Over: LITTLE ROCK CR-STOCKPASS

4M NE MOORE, Fergus, MT

Built 2009 Load: 99.9 t ADT: 2,202

US 191

Good

Over: ROSS FORK CREEK

2M S GARNEILL, Fergus, MT

Built 1990 Load: 99.9 t ADT: 2,077

6TH AVE S

Poor

Over: BIG SPRING CREEK 133

LEWISTOWN-6TH AVE S, Fergus, MT

Built 1962 Load: 4.5 t ADT: 434

THIRD AVENUE S

Poor

Over: LITTLE CASINO CREEK 138

LEWISTOWN-3RD AVE S, Fergus, MT

Built 2006 Load: 4.5 t ADT: 100

ROAD 220

Poor

Over: CARROLL COULEE

SECT 22 T21N R26E, Fergus, MT

Built 1963 Load: 24.5 t ADT: 5

N DAWES STREET

Poor

Over: BIG SPRING CREEK 061

LEWISTOWN-N DAWES ST, Fergus, MT

Built 1940 Load: 24.5 t ADT: 100

US 87

Poor

Over: DRAINAGE

13M NW GRASS RANGE, Fergus, MT

Built 1939 Load: 25.4 t ADT: 1,442

Read our methodology — how this data is sourced, computed, and verified.

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial