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)

Sort:

I 15

Over: INT DEARBORN-MISSOURI R

6M N CRAIG, Cascade, MT

Built 1971 ADT: 100

I 15

Over: INT DEARBORN-MISSOURI R

6M N CRAIG, Cascade, MT

Built 1971 ADT: 100

I 15

Over: MISSOURI RIVER-LOCAL

7M N CRAIG, Cascade, MT

Built 1971 ADT: 50

I 15

Over: MISSOURI RIVER-LOCAL

7M N CRAIG, Cascade, MT

Built 1971 ADT: 100

I 15

Over: INT HARDY-HARDY CREEK

7M S CASCADE, Cascade, MT

Built 1968 ADT: 314

I 15

Over: INT HARDY-HARDY CREEK

7M S CASCADE, Cascade, MT

Built 1968 ADT: 314

I 15

Over: SEP TINTINGER

5M S CASCADE, Cascade, MT

Built 1961 ADT: 100

I 15

Over: SEP TINTINGER

5M S CASCADE, Cascade, MT

Built 1978 ADT: 100

I 15

Over: SEP OLD US 91

3M S CASCADE, Cascade, MT

Built 1961 ADT: 314

I 15

Over: SEP OLD US 91

3M S CASCADE, Cascade, MT

Built 1978 ADT: 314

I 15

Over: INT S CASCADE

CASCADE, Cascade, MT

Built 1961 ADT: 100

I 15

Over: INT S CASCADE

CASCADE, Cascade, MT

Built 1978 ADT: 100

I 15

Over: INT N CASCADE

CASCADE, Cascade, MT

Built 1961 ADT: 100

I 15

Over: INT N CASCADE

CASCADE, Cascade, MT

Built 1977 ADT: 100

I 15

Over: INT ULM

ULM, Cascade, MT

Built 1958 ADT: 177

I 15

Over: INT ULM

ULM, Cascade, MT

Built 1969 ADT: 177

I 15

Over: SEP COUNTY ROAD

3M N ULM, Cascade, MT

Built 1969 ADT: 100

I 15

Over: SEP COUNTY ROAD

3M N ULM, Cascade, MT

Built 1969 ADT: 100

I 15

Over: SEP 5TH AVE SW

GREAT FALLS, Cascade, MT

Built 1967 ADT: 640

I 15

Over: SEP 5TH AVE SW

GREAT FALLS, Cascade, MT

Built 1967 ADT: 640

I 15

Over: INT EMERSON JCT-RR

1M N GREAT FALLS, Cascade, MT

Built 1967 ADT: 6,717

I 15

Over: INT EMERSON JCT-RR

1M N GREAT FALLS, Cascade, MT

Built 1967 ADT: 6,717

I 15

Over: INT MANCHESTER

4M S VAUGHN, Cascade, MT

Built 1960 ADT: 100

I 15

Over: INT MANCHESTER

4M S VAUGHN, Cascade, MT

Built 1960 ADT: 100

I 15

Over: SEP NEUMAN SCH RD

2M N VAUGHN, Cascade, MT

Built 1972 ADT: 100

I 15

Over: SEP NEUMAN SCH RD

2M N VAUGHN, Cascade, MT

Built 1972 ADT: 100

I 15

Over: SEP GUNDERSON RD

2M S POWER, Cascade, MT

Built 1972 ADT: 100

I 15

Over: SEP GUNDERSON RD

2M S POWER, Cascade, MT

Built 1972 ADT: 100

I 315S

Over: INT I 15

GREAT FALLS, Cascade, MT

Built 1967 ADT: 6,889

I 315S

Over: FAU 5225-14TH ST SW

GREAT FALLS, Cascade, MT

Built 1967 ADT: 9,271

I 315S

Over: FAU 5225-14TH ST SW

GREAT FALLS, Cascade, MT

Built 1967 ADT: 3,395

I 315 S

Over: FAU 5225-14TH ST SW

GREAT FALLS, Cascade, MT

Built 1997 ADT: 9,271

ANDERSON RD

Over: INT GORDON-I 15

6M NW VAUGHN, Cascade, MT

Built 1972 ADT: 2,000

OLD ULM CASCADE RD

Over: SEP I 15

6M NE CASCADE, Cascade, MT

Built 1977 ADT: 4,847

OLD ULM CASCADE RD

Over: SEP I 15

3M SW ULM, Cascade, MT

Built 1970 ADT: 2,424

FRONTAGE ROAD 614

Over: INT SEP I 15

4M SW CASCADE, Cascade, MT

Built 1978 ADT: 2,189

FRONTAGE ROAD 615

Over: INT CANYON-I 15

11M SW CASCADE, Cascade, MT

Built 1968 ADT: 2,224

34TH ST NW

Over: SEP 34TH ST-I 15

1M W GREAT FALLS, Cascade, MT

Built 1967 ADT: 3,244

SUN RIVER RD

Over: SEP WEST HILL-I 15 127

GREAT FALLS, Cascade, MT

Built 1967 ADT: 5,101

US 89

Over: INT VAUGHN-I 15

VAUGHN, Cascade, MT

Built 1960 ADT: 4,297

US 87-MT 3-MT 200

Over: MISSOURI RIVER-U5205-RR

GREAT FALLS-10TH AVE S, Cascade, MT

Built 1983 ADT: 5,718

US 89-MT 3-MT 200

Over: MISSOURI RIVER-U5205-RR

GREAT FALLS-10TH AVE S, Cascade, MT

Built 1951 ADT: 5,718

SMELTER AVE

Over: 15TH ST NE

BLACK EAGLE-SMELTER AVE, Cascade, MT

Built 1963 ADT: 11,678

CENTRAL AVE W

Over: INT CENTRAL AVE W-I 15

GREAT FALLS-CENTRAL AVE W, Cascade, MT

Built 1967 ADT: 3,244

CENTRAL AVE W

Over: GALT AVE-RR

GREAT FALLS-CENTRAL AVE W, Cascade, MT

Built 1967 ADT: 689

CENTRAL AVE W

Over: GALT AVE-RR

GREAT FALLS-CENTRAL AVE W, Cascade, MT

Built 1967 ADT: 689

AIRPORT DR

Over: INT GORE HILL-I 15

1M SW GREAT FALLS, Cascade, MT

Built 1967 ADT: 3,053

NFSR 834

Over: BELT CREEK

JCT US 89/NFSR 834, Cascade, MT

Built 1909 ADT: 99

NFSR 1049

Over: BELT CREEK

EAST OF JCT US89/NFSR1049, Cascade, MT

Built 1909 ADT: 99

LOWREY RD

Over: SUN RIVER 062

5M NW SIMMS, Cascade, MT

Built 1960 Load: 12.7 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.