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)

MT 21

Fair

Over: HEPPLER COULEE 109

4M W SIMMS, Cascade, MT

Built 1934 Load: 31.8 t ADT: 418

HIGHWOOD RD

Fair

Over: RED COULEE

13M E GREAT FALLS, Cascade, MT

Built 1941 Load: 31.8 t ADT: 549

5TH LN

Fair

Over: GREENFIELD S CANAL 045

5M E FAIRFIELD, Cascade, MT

Built 2003 Load: 31.9 t ADT: 100

POWERLINE RD

Fair

Over: DRAINAGE 025

9M N GREAT FALLS, Cascade, MT

Built 1931 Load: 32.7 t ADT: 100

HUGHESVILLE RD

Fair

Over: DRY FORK BELT CREEK 077

E MONARCH, Cascade, MT

Built 1962 Load: 32.7 t ADT: 100

HUGHESVILLE RD

Fair

Over: DRY FORK BELT CREEK 078

2M E MONARCH, Cascade, MT

Built 1962 Load: 32.7 t ADT: 100

HUGHESVILLE RD

Fair

Over: DRY FORK BELT CREEK 080

4M E MONARCH, Cascade, MT

Built 1962 Load: 32.7 t ADT: 100

HUGHESVILLE RD

Fair

Over: DRY FORK BELT CREEK 103

7M E MONARCH, Cascade, MT

Built 1962 Load: 32.7 t ADT: 100

ADEL RD

Fair

Over: W FORK HOUND CREEK 120

19M SE CASCADE, Cascade, MT

Built 1950 Load: 32.7 t ADT: 100

US 89 FH 32

Fair

Over: BELT CREEK

1M SE NEIHART, Cascade, MT

Built 2001 Load: 32.7 t ADT: 385

25TH ST N

Fair

Over: ABANDONED RAILROAD

GREAT FALLS-25TH ST N, Cascade, MT

Built 1914 Load: 32.7 t ADT: 4,632

WILLOW CREEK RD

Fair

Over: LITTLE BELT CREEK 099

13M E BELT, Cascade, MT

Built 1950 Load: 33.6 t ADT: 157

S 200

Fair

Over: SUN RIVER

SUN RIVER, Cascade, MT

Built 1996 Load: 33.6 t ADT: 2,418

CASTNER FALLS RD

Fair

Over: BIRD CREEK 038

5M E CASCADE, Cascade, MT

Built 1938 Load: 34.5 t ADT: 100

I 15

Fair

Over: RR-MISSOURI RIVER

8M S CASCADE, Cascade, MT

Built 1968 Load: 35.4 t ADT: 2,224

I 15

Fair

Over: RR-MISSOURI RIVER

8M S CASCADE, Cascade, MT

Built 1968 Load: 35.4 t ADT: 2,224

9TH ST N

Fair

Over: MISSOURI RIVER

GREAT FALLS-9TH-10 ST N, Cascade, MT

Built 1996 Load: 35.4 t ADT: 15,478

CARLSON RD

Fair

Over: FLAT CREEK 034

12M E CASCADE, Cascade, MT

Built 1938 Load: 39.9 t ADT: 100

I 15 NB

Fair

Over: SUN RIVER

GREAT FALLS, Cascade, MT

Built 1966 Load: 40.8 t ADT: 5,101

I 15 SB

Fair

Over: SUN RIVER

GREAT FALLS, Cascade, MT

Built 1966 Load: 40.8 t ADT: 5,101

8TH LN

Fair

Over: MILL COULEE CANAL 049

8M E FAIRFIELD, Cascade, MT

Built 1950 Load: 46.0 t ADT: 100

US 87

Fair

Over: OTTER CREEK

4M SE BELT, Cascade, MT

Built 1959 Load: 46.3 t ADT: 1,078

US 87

Fair

Over: OTTER CREEK

6M SE BELT, Cascade, MT

Built 1959 Load: 46.3 t ADT: 1,078

US 87

Fair

Over: OTTER CREEK

7M SE BELT, Cascade, MT

Built 1959 Load: 47.2 t ADT: 1,078

US 87

Fair

Over: OTTER CREEK

5M SE BELT, Cascade, MT

Built 1959 Load: 50.8 t ADT: 1,078

I 15

Good

Over: LITTLE MUDDY CREEK

6M N CASCADE, Cascade, MT

Built 1958 Load: 16.8 t ADT: 2,424

I 15

Good

Over: LITTLE MUDDY CREEK

6M N CASCADE, Cascade, MT

Built 1958 Load: 17.2 t ADT: 2,424

JARVI RD

Good

Over: LITTLE BELT CREEK 037

13M E BELT, Cascade, MT

Built 1971 Load: 18.1 t ADT: 100

SUN R CASCADE RD

Good

Over: LITTLE MUDDY CREEK 040

6M N CASCADE, Cascade, MT

Built 2004 Load: 18.1 t ADT: 67

CENTRAL AVE W

Good

Over: SUN RIVER 056

GREAT FALLS, Cascade, MT

Built 1987 Load: 18.1 t ADT: 1,578

CENTRAL AVE

Good

Over: MISSOURI RIVER-PED TRAIL

GREAT FALLS-CENTRAL AVE W, Cascade, MT

Built 1980 Load: 18.1 t ADT: 25,875

FDR 267

Good

Over: CHAMBERLAIN CREEK

0.9 MI E. US89/FDR267 JCT, Cascade, MT

Built 2002 Load: 20.4 t ADT: 50

LOWREY RD

Good

Over: FORT SHAW CANAL 061

5M NW SIMMS, Cascade, MT

Built 2001 Load: 20.9 t ADT: 100

KLOCK RD

Good

Over: CASTNER COULEE 096

CASTNER FALLS, Cascade, MT

Built 1938 Load: 21.4 t ADT: 100

7TH LN

Good

Over: MILL COULEE CANAL 093

7M E FAIRFIELD, Cascade, MT

Built 1950 Load: 21.8 t ADT: 100

BLAINE ST

Good

Over: SAND COULEE CREEK 087

TRACY, Cascade, MT

Built 1950 Load: 23.5 t ADT: 100

MILLEGAN RD

Good

Over: DRAINAGE-STOCKPASS

14M S ULM, Cascade, MT

Built 2000 Load: 23.6 t ADT: 292

MILLEGAN RD

Good

Over: SMITH RIVER

15M SE ULM, Cascade, MT

Built 1962 Load: 23.6 t ADT: 292

BRANCH I 15-U.S. 8

Good

Over: RR

GREAT FALLS, Cascade, MT

Built 1946 Load: 24.3 t ADT: 6,196

JOHNSON RD

Good

Over: SAND COULEE CREEK 076

2M N TRACY, Cascade, MT

Built 2002 Load: 24.5 t ADT: 100

BOSTON COULEE RD

Good

Over: SMITH RIVER 027

7M SW EDEN, Cascade, MT

Built 2004 Load: 25.4 t ADT: 39

N FORT SHAW RD

Good

Over: SUN RIVER 063

FORT SHAW, Cascade, MT

Built 1998 Load: 26.3 t ADT: 100

HUGHESVILLE RD

Good

Over: DRY FORK BELT CREEK 101

5M E MONARCH, Cascade, MT

Built 1962 Load: 26.3 t ADT: 100

SIMMS FAIRFIELD RD

Good

Over: SUN RIVER

SIMMS, Cascade, MT

Built 1983 Load: 26.3 t ADT: 472

SALEM RD

Good

Over: BELT CREEK 071

16M NE GREAT FALLS, Cascade, MT

Built 1998 Load: 27.2 t ADT: 100

US 89 FH 32

Good

Over: BELT CREEK

1M N NEIHART, Cascade, MT

Built 1951 Load: 29.0 t ADT: 448

US 89 FH 32

Good

Over: BELT CREEK

3M N NEIHART, Cascade, MT

Built 1967 Load: 29.0 t ADT: 448

US 89 FH 32

Good

Over: BELT CREEK

7M S BELT, Cascade, MT

Built 1968 Load: 29.0 t ADT: 1,144

SIMMS CASCADE RD

Good

Over: FORT SHAW CANAL 041

2M SW SIMMS, Cascade, MT

Built 1938 Load: 29.9 t ADT: 100

US 89

Good

Over: RR

VAUGHN, Cascade, MT

Built 2002 Load: 29.9 t ADT: 5,533

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.