Cascade County, MT

185 public highway bridges

Cascade County Bridge Snapshot

Cascade County, Montana contains 185 public highway bridges in the FHWA National Bridge Inventory. Roughly 28.6% are rated “Good,” 42.2% “Fair,” 3.8% “Poor,” and 3.8% 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.

185
Total Bridges
28.6%
Good
3.8%
Poor
3.8%
Structurally Deficient

Condition Distribution

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

Related

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