Fergus County, MT

155 public highway bridges

Fergus County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Fergus County, Montana contains 155 public highway bridges. Roughly 30.3% are rated “Good,” 63.2% “Fair,” and 6.5% “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.

155

Total Bridges

30.3%

Good

63.2%

Fair

6.5%

Poor Condition

Condition Distribution

Good

30.3% (47)

Fair

63.2% (98)

Poor

6.5% (10)

All Bridges (155)

Sort:

PIONEER ROAD

Over: COYOTE CREEK

4 MILES SOUTHWEST OF DENT, Fergus, MT

Built 1979 Load: 7.3 t ADT: 100

ARMELLS ROAD

Over: ARMELLS CREEK

11M NE HILGER, Fergus, MT

Built 2022 Load: 8.2 t ADT: 100

2ND AVENUE

Over: BIG SPRING CREEK 060

LEWISTOWN-2ND AVE, Fergus, MT

Built 1930 Load: 9.9 t ADT: 100

POOR FARM LOOP

Over: BIG SPRING CREEK

1M NW Lewistown, Fergus, MT

Built 1908 Load: 10.0 t ADT: 100

72 BENCH RD

Over: WARM SPRINGS CREEK 078

5M N DANVERS, Fergus, MT

Built 1980 Load: 10.0 t ADT: 100

FOREST GROVE RD

Over: S FORK MCDONALD CR 070

4M SW GRASSRANGE, Fergus, MT

Built 1982 Load: 10.0 t ADT: 146

SINGLE PINE RD

Over: COTTONWOOD CREEK 028

7M SW LEWISTOWN, Fergus, MT

Built 1989 Load: 10.0 t ADT: 100

BALLY DOME RD

Over: WOLF CREEK 089

7M E DENTON, Fergus, MT

Built 1979 Load: 11.8 t ADT: 100

VALENTINE RD

Over: BOX ELDER CREEK 130

8M E ROY, Fergus, MT

Built 1983 Load: 11.8 t ADT: 100

FOREST GROVE RD

Over: S FORK MCDONALD CR 046

6M SW GRASSRANGE, Fergus, MT

Built 1986 Load: 11.8 t ADT: 146

ALTON CUTOFF

Over: WOLF CREEK 091

4M E DENTON, Fergus, MT

Built 1979 Load: 12.7 t ADT: 100

ARNTZEN LN

Over: DOG CREEK

2M SE CHRISTINA, Fergus, MT

Built 2020 Load: 14.5 t ADT: 100

PACER COULEE RD

Over: DRY WOLF CREEK 093

4M SE DENTON, Fergus, MT

Built 1990 Load: 14.5 t ADT: 100

TYLER CUTOFF

Over: MCDONALD CREEK 125

1M S GRASSRANGE, Fergus, MT

Built 1975 Load: 15.4 t ADT: 100

US 87-E MAIN ST

Over: MILL DITCH

LEWISTOWN-E MAIN ST, Fergus, MT

Built 1922 Load: 15.4 t ADT: 8,688

W BRASSEY ST

Over: BIG SPRING CREEK

LEWISTOWN-W BRASSEY ST, Fergus, MT

Built 1920 Load: 15.4 t ADT: 1,899

NFSR #275

Over: ROCK CREEK

3 MI. N. OF CRYSTAL LAKE, Fergus, MT

Built 1938 Load: 15.9 t ADT: 50

N DENTON RD

Over: COFFEE CREEK 081

6M N DENTON, Fergus, MT

Built 1979 Load: 16.3 t ADT: 100

NFSR #275

Over: ROCK CREEK

5 MI NORTH OF CRYSTAL LK, Fergus, MT

Built 1954 Load: 16.5 t ADT: 50

OLIES RD

Over: WOLF CREEK 088

6M E DENTON, Fergus, MT

Built 1983 Load: 16.8 t ADT: 100

ERLE LN

Over: DOG CREEK 102

SUFFOLK, Fergus, MT

Built 1981 Load: 17.2 t ADT: 100

HITCHCOCK RD

Over: DRY WOLF CREEK 096

6M SE DENTON, Fergus, MT

Built 1980 Load: 17.7 t ADT: 4

BEAR SPRINGS RD

Over: WOLF CREEK 013

11M NE DENTON, Fergus, MT

Built 1980 Load: 18.1 t ADT: 13

CUNNINGHAM RD

Over: DRY WOLF CREEK 094

6M S DENTON, Fergus, MT

Built 1982 Load: 18.1 t ADT: 100

MILLER STREET

Over: MILL DITCH 041

LEWISTOWN-MILLER ST, Fergus, MT

Built 1973 Load: 18.1 t ADT: 100

WILDER TRAIL

Over: SACAGAWEA RIV 113

11M NE ROY, Fergus, MT

Built 2015 Load: 19.1 t ADT: 100

VALENTINE RD

Over: BLOOD CREEK 131

4M NW VALENTINE, Fergus, MT

Built 1980 Load: 19.1 t ADT: 100

FOREST GROVE RD

Over: S FORK MCDONALD CR 071

4M SW GRASSRANGE, Fergus, MT

Built 1970 Load: 19.1 t ADT: 146

US 87

Over: IRRIGATION RESERVOIR

6M NW GRASS RANGE, Fergus, MT

Built 1939 Load: 19.1 t ADT: 1,300

S 81

Over: COFFEE CREEK

COFFEE CREEK, Fergus, MT

Built 1952 Load: 19.1 t ADT: 345

WATER STREET

Over: BIG SPRING CREEK 059

LEWISTOWN-WATER ST, Fergus, MT

Built 1930 Load: 20.8 t ADT: 100

COUNTY ROAD 116

Over: ARMELLS CREEK 115

10M NE HILGER, Fergus, MT

Built 1977 Load: 20.9 t ADT: 100

GRINDE RD

Over: WARM SPRINGS CREEK 009

4M SW HILGER, Fergus, MT

Built 1986 Load: 20.9 t ADT: 100

U BET RD

Over: ROSS FORK CREEK 026

W GARNEILL, Fergus, MT

Built 1987 Load: 20.9 t ADT: 36

UPPER SPRING CR RD

Over: MILL DITCH

LEWISTOWN, Fergus, MT

Built 1958 Load: 20.9 t ADT: 6,241

E BOULEVARD ST

Over: BIG SPRING CREEK

LEWISTOWN-E BOULEVARD ST, Fergus, MT

Built 1920 Load: 20.9 t ADT: 671

WASHBOARD RD

Over: DOG CREEK 101

W SUFFOLK, Fergus, MT

Built 1983 Load: 21.8 t ADT: 100

UPPER CHIPPEWA RD

Over: CHIPPEWA CREEK 004

5M NW GRASSRANGE, Fergus, MT

Built 1980 Load: 21.8 t ADT: 100

JENNI RD

Over: BEAVER CREEK 030

7M W LEWISTOWN, Fergus, MT

Built 1929 Load: 21.8 t ADT: 100

US 87

Over: S FORK MCDONALD CREEK

1M N GRASS RANGE, Fergus, MT

Built 1939 Load: 21.8 t ADT: 1,300

ROSE CREEK RD

Over: ROSE CREEK 108

3M E WINIFRED, Fergus, MT

Built 1980 Load: 22.7 t ADT: 100

S FORK RD

Over: FLATWILLOW CREEK 124

14M SE FORESTGROVE, Fergus, MT

Built 1986 Load: 22.7 t ADT: 100

GRAVES RD

Over: FLATWILLOW CREEK 001

20M S GRASSRANGE, Fergus, MT

Built 1988 Load: 22.7 t ADT: 100

US 87

Over: N FORK MCDONALD CREEK

8M NW GRASS RANGE, Fergus, MT

Built 1939 Load: 22.7 t ADT: 1,300

US 87

Over: DRAINAGE

2M NW GRASS RANGE, Fergus, MT

Built 1939 Load: 22.7 t ADT: 1,300

VALENTINE RD

Over: BLOOD CREEK 132

25M N WINNETT, Fergus, MT

Built 1986 Load: 23.6 t ADT: 100

LWR COTTONWOOD CR

Over: COTTONWOOD CREEK 034

8M W LEWISTOWN, Fergus, MT

Built 2009 Load: 23.6 t ADT: 26

US 191-KENDALL RD

Over: BIG SPRING CREEK

LEWISTOWN-KENDALL RD, Fergus, MT

Built 1976 Load: 23.6 t ADT: 3,046

US 87

Over: BOYD CREEK

3M E LEWISTOWN, Fergus, MT

Built 1942 Load: 23.6 t ADT: 1,477

SURENUFF RD

Over: S FORK MCDONALD CR 002

FOREST GROVE, Fergus, MT

Built 1982 Load: 24.5 t ADT: 100

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.