Cascade County, MT

185 public highway bridges

Cascade County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Cascade County, Montana contains 185 public highway bridges. Roughly 28.6% are rated “Good,” 42.2% “Fair,” and 3.8% “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.

185
Total Bridges
28.6%
Good
42.2%
Fair
3.8%
Poor Condition

Condition Distribution

Good
28.6% (53)
Fair
42.2% (78)
Poor
3.8% (7)

All Bridges (185)

BROWN RD

Fair

Over: SAND COULEE CREEK 088

TRACY, Cascade, MT

Built 1950 Load: 12.7 t ADT: 100

FDR 839

Fair

Over: LOGGING CREEK

14 MI. WEST OF JCT US89, Cascade, MT

Built 1956 Load: 13.9 t ADT: 46

FDR 1122

Fair

Over: BELT CREEK

0.1 MI W OF BELT CR. R.S., Cascade, MT

Built 1972 Load: 14.3 t ADT: 50

FDR 839

Fair

Over: LOGGING CREEK

13.5 MI. W. US89/839 JCT, Cascade, MT

Built 1956 Load: 14.3 t ADT: 46

7TH LN

Fair

Over: GREENFIELD S CANAL 065

7M E FAIRFIELD, Cascade, MT

Built 1950 Load: 14.5 t ADT: 100

SHAW CUTOFF RD

Fair

Over: LITTLE MUDDY CREEK 126

12M NW CASCADE, Cascade, MT

Built 1933 Load: 15.4 t ADT: 100

1ST RD S

Fair

Over: MILL COULEE CANAL 046

9M E FAIRFIELD, Cascade, MT

Built 2004 Load: 16.1 t ADT: 100

COUNTY LINE RD

Fair

Over: GREENFIELD CANAL 044

7M E FAIRFIELD, Cascade, MT

Built 1973 Load: 16.2 t ADT: 100

WILLOW CREEK RD

Fair

Over: LITTLE BELT CREEK 003

14M E BELT, Cascade, MT

Built 1938 Load: 16.3 t ADT: 157

OLD US HWY 91

Fair

Over: MUDDY CREEK SLOUGH 111

ULM, Cascade, MT

Built 1923 Load: 16.3 t ADT: 100

FDR 3411

Fair

Over: BELT CREEK

MANY PINES CAMPGROUND, Cascade, MT

Built 1962 Load: 16.5 t ADT: 50

E HIGHWOOD RD

Fair

Over: BELT CREEK 002

8M N BELT, Cascade, MT

Built 1935 Load: 17.2 t ADT: 100

CENTRAL AVE

Fair

Over: BELT CREEK 084

ARMINGTON, Cascade, MT

Built 1938 Load: 17.2 t ADT: 284

15TH ST N-US 87

Fair

Over: MISSOURI R-RIVERS TRAIL

GREAT FALLS-15TH ST N, Cascade, MT

Built 1962 Load: 17.2 t ADT: 13,743

NFSR 613

Fair

Over: DRY FORK BELT CREEK

RUBY HENN, Cascade, MT

Built 1956 Load: 18.8 t ADT: 50

NFSR 834

Fair

Over: HARLEY CREEK

1.2 MILES WEST US89, Cascade, MT

Built 1953 Load: 19.1 t ADT: 50

NFSR 834

Fair

Over: HARLEY CREEK

0.2 MILES WEST US89, Cascade, MT

Built 1953 Load: 19.8 t ADT: 50

MILLEGAN RD

Fair

Over: SMITH RIVER

5M SE ULM, Cascade, MT

Built 1950 Load: 20.0 t ADT: 292

NFSR 834

Fair

Over: GRAVEYARD GULCH CREEK

1.4 MILES WEST US89, Cascade, MT

Built 1953 Load: 20.4 t ADT: 50

PARKER RD

Fair

Over: SUN RIVER SLOUGH 060

4M W SUN RIVER, Cascade, MT

Built 1950 Load: 20.9 t ADT: 100

11TH LN

Fair

Over: GREENFIELD S CANAL 047

11M E FAIRFIELD, Cascade, MT

Built 2009 Load: 21.5 t ADT: 100

GORDON RD

Fair

Over: MUDDY CREEK 042

7M NW VAUGHN, Cascade, MT

Built 1973 Load: 21.7 t ADT: 70

OLD US 91

Fair

Over: MISSOURI RIVER-RR 069

11M S CASCADE, Cascade, MT

Built 1931 Load: 21.8 t ADT: 314

I 15

Fair

Over: MISSOURI RIVER

7M N CRAIG, Cascade, MT

Built 1971 Load: 22.7 t ADT: 2,224

I 15

Fair

Over: MISSOURI RIVER

7M N CRAIG, Cascade, MT

Built 1971 Load: 22.7 t ADT: 2,224

CENTRAL AVE E

Fair

Over: MISSOURI RIVER

CASCADE, Cascade, MT

Built 1954 Load: 22.7 t ADT: 287

RIVER RD

Fair

Over: BIRD CREEK 036

5M NE CASCADE, Cascade, MT

Built 1940 Load: 23.6 t ADT: 100

OLD ULM CASCADE RD

Fair

Over: LITTLE MUDDY CREEK 067

7M NE CASCADE, Cascade, MT

Built 1987 Load: 23.6 t ADT: 100

OLD US 91

Fair

Over: PREWETT CREEK 070

10M S CASCADE, Cascade, MT

Built 1931 Load: 23.6 t ADT: 314

OLD US 91

Fair

Over: NOVAK CREEK 005

12M S CASCADE, Cascade, MT

Built 1931 Load: 24.5 t ADT: 314

MILLEGAN RD

Fair

Over: MISSOURI RIVER

ULM, Cascade, MT

Built 1983 Load: 25.0 t ADT: 549

US 89

Fair

Over: MILL COULEE CANAL

5M N FORT SHAW, Cascade, MT

Built 1940 Load: 25.4 t ADT: 1,747

MILL COULEE RD

Fair

Over: MILL COULEE CANAL 064

8M SE FAIRFIELD, Cascade, MT

Built 1920 Load: 26.3 t ADT: 100

COUNTY ROAD 242

Fair

Over: OTTER CREEK 125

BLYTHE, Cascade, MT

Built 1950 Load: 26.3 t ADT: 9

US 89

Fair

Over: MILL COULEE CREEK

1M NE SUN RIVER, Cascade, MT

Built 1940 Load: 26.3 t ADT: 1,428

6TH ST SW

Fair

Over: SUN RIVER

GREAT FALLS-6TH ST SW, Cascade, MT

Built 1980 Load: 26.3 t ADT: 14,706

10TH LN

Fair

Over: BENCH SOUTH CANAL 048

10M E FAIRFIELD, Cascade, MT

Built 1984 Load: 27.2 t ADT: 100

EWING RD

Fair

Over: BELT CREEK 074

3M N BELT, Cascade, MT

Built 1973 Load: 27.2 t ADT: 100

COUNTY LINE RD

Fair

Over: GREENFIELD S CANAL 043

9M E FAIRFIELD, Cascade, MT

Built 1982 Load: 28.1 t ADT: 100

BELT PARK RD

Fair

Over: BELT CREEK 019

3M S MONARCH, Cascade, MT

Built 1955 Load: 28.1 t ADT: 100

US 89

Fair

Over: MILL COULEE CREEK

2M NE SUN RIVER, Cascade, MT

Built 1940 Load: 28.1 t ADT: 1,428

LOWER RIVER RD

Fair

Over: SAND COULEE CREEK

3M S GREAT FALLS, Cascade, MT

Built 1937 Load: 28.1 t ADT: 1,587

ARMINGTON RD

Fair

Over: BIG OTTER CREEK 029

3M SE BELT, Cascade, MT

Built 1954 Load: 28.5 t ADT: 100

ASHUELOT HILL RD

Fair

Over: BENCH SOUTH CANAL 066

9M E FAIRFIELD, Cascade, MT

Built 1950 Load: 29.0 t ADT: 26

MT 21

Fair

Over: FORT SHAW CANAL 110

3M W SIMMS, Cascade, MT

Built 1934 Load: 29.0 t ADT: 418

MT 21

Fair

Over: SIMMS CREEK 112

2M W SIMMS, Cascade, MT

Built 1934 Load: 29.0 t ADT: 418

EVANS RICEVILLE RD

Fair

Over: BELT CREEK 015

12M N MONARCH, Cascade, MT

Built 1962 Load: 29.9 t ADT: 100

A-6 LANE

Fair

Over: BELT CREEK

4.8 KM SE OF MONARCH, Cascade, MT

Built 1960 Load: 30.8 t ADT: 20

CORA CREEK RD

Fair

Over: CORA CREEK 075

7M SE BELT, Cascade, MT

Built 1950 Load: 30.8 t ADT: 100

SIMMS ASHUELOT RD

Fair

Over: BLACKFOOT COULEE 053

2M NE SIMMS, Cascade, MT

Built 1976 Load: 31.8 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

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.