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)

US 89 FH 32

Good

Over: BELT CREEK

3M S BELT, Cascade, MT

Built 1968 Load: 29.9 t ADT: 702

MEYER AVE

Good

Over: SAND COULEE CREEK 081

1M S TRACY, Cascade, MT

Built 1950 Load: 30.8 t ADT: 100

US 89

Good

Over: GREENFIELDS SOUTH CANAL

5M E FAIRFIELD, Cascade, MT

Built 1960 Load: 30.8 t ADT: 1,747

S 200

Good

Over: MILL COULEE CREEK

1M NE SUN RIVER, Cascade, MT

Built 1996 Load: 30.8 t ADT: 2,418

US 89 FH 32

Good

Over: BELT CREEK

6M S BELT, Cascade, MT

Built 1968 Load: 30.8 t ADT: 702

WILLOW CREEK RD

Good

Over: LITTLE BELT CREEK 100

12M E BELT, Cascade, MT

Built 1950 Load: 31.8 t ADT: 157

OFF RAMP TO 14TH S

Good

Over: RR

GREAT FALLS, Cascade, MT

Built 1996 Load: 32.7 t ADT: 3,357

HUGHESVILLE RD

Good

Over: DRY FORK BELT CREEK 079

3M E MONARCH, Cascade, MT

Built 1962 Load: 32.7 t ADT: 100

UPPER MILLEGAN RD

Good

Over: HOUND CREEK 028

15M SE CASCADE, Cascade, MT

Built 1975 Load: 32.7 t ADT: 79

ULM VAUGHN RD

Good

Over: SUN RIVER 057

2M S VAUGHN, Cascade, MT

Built 2013 Load: 33.6 t ADT: 695

US 87-US 89

Good

Over: BELT CREEK

2M S BELT, Cascade, MT

Built 2022 Load: 35.4 t ADT: 2,931

BRANCH I 15-U.S. 8

Good

Over: RR

GREAT FALLS, Cascade, MT

Built 1967 Load: 35.4 t ADT: 6,196

US 89

Good

Over: MUDDY CREEK

VAUGHN, Cascade, MT

Built 2002 Load: 35.4 t ADT: 5,533

MANCHESTER RD S

Good

Over: SUN RIVER 055

MANCHESTER, Cascade, MT

Built 2001 Load: 36.3 t ADT: 203

US 89 FH 32

Good

Over: DRY FORK BELT CREEK

MONARCH, Cascade, MT

Built 2014 Load: 37.2 t ADT: 448

HIGHWOOD RD

Good

Over: BELT CREEK

6M S HIGHWOOD, Cascade, MT

Built 2009 Load: 37.2 t ADT: 456

US 87-US 89

Good

Over: BOX ELDER CREEK

8M SE GREAT FALLS, Cascade, MT

Built 1989 Load: 38.1 t ADT: 4,303

HORSE RANCH ROAD

Good

Over: ARMELLS CREEK

3.9 miles north of Irish, Cascade, MT

Built 2017 Load: 43.5 t ADT: 20

BRIDGE STREET

Good

Over: BELT CREEK 012

BELT-BRIDGE STREET, Cascade, MT

Built 2012 Load: 44.5 t ADT: 1,640

OVERLOOK DR

Good

Over: RR BY WATERWORKS

GREAT FALLS-OVERLOOK DR, Cascade, MT

Built 2009 Load: 45.4 t ADT: 5,117

US 87

Good

Over: OTTER CREEK

5M SE BELT, Cascade, MT

Built 1959 Load: 46.3 t ADT: 1,078

US 87

Good

Over: OTTER CREEK

3M SE BELT, Cascade, MT

Built 1959 Load: 47.2 t ADT: 1,078

US 87

Good

Over: OTTER CREEK

4M SE BELT, Cascade, MT

Built 1959 Load: 47.2 t ADT: 1,078

US 87

Good

Over: OTTER CREEK

3M SE BELT, Cascade, MT

Built 1959 Load: 49.9 t ADT: 1,078

US 87

Good

Over: OTTER CREEK

5M SE BELT, Cascade, MT

Built 1959 Load: 50.8 t ADT: 1,078

E HIGHWOOD RD

Good

Over: LITTLE BELT CREEK 004

3M E BELT, Cascade, MT

Built 1971 Load: 51.2 t ADT: 100

EWING RD

Good

Over: LITTLE BELT CREEK 098

4M N BELT, Cascade, MT

Built 1973 Load: 59.0 t ADT: 100

GIANT SPRINGS RD

Good

Over: RIVERS EDGE TRAIL

GREAT FALLS, Cascade, MT

Built 2002 Load: 99.9 t ADT: 1,068

TRULY CUTOFF RD

Poor

Over: SMITH RIVER 033

7M SE ULM, Cascade, MT

Built 1908 Load: 6.8 t ADT: 100

FDR 267

Poor

Over: JEFFERSON CREEK

0.1 MI EAST US89/267 JCT, Cascade, MT

Built 1957 Load: 19.1 t ADT: 50

NFSR 487

Poor

Over: S FK JUDITH RIVER

18.6 MI. SW FROM UTICA, Cascade, MT

Built 1958 Load: 20.1 t ADT: 65

OLD US HWY 91

Poor

Over: LITTLE MUDDY CREEK 090

6M N CASCADE, Cascade, MT

Built 1923 Load: 26.3 t ADT: 100

US 89 FH 32

Poor

Over: BELT CREEK

9M S BELT, Cascade, MT

Built 1968 Load: 30.8 t ADT: 1,144

SHEEP CR RD

Structurally Deficient

Over: SHEEP CREEK 097

12M S CASCADE, Cascade, MT

Built 1950 Load: 3.6 t ADT: 68

NFSR 839

Structurally Deficient

Over: BELT CREEK

8.4 MI. W OF US 89 JCT, Cascade, MT

Built 1954 Load: 12.7 t ADT: 46

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

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