State profile · Near median Poor share

Montana bridge safety

Condition ratings, load ratings, and Poor-condition data for every public highway bridge in Montana, based on the FHWA National Bridge Inventory.

5,122
Public bridges
28.3%
Good condition
6.7%
Poor condition

Data updated May 2026

Total Bridges

5,122

Public highway bridges in Montana

Good Condition

28.3%

1,447 bridges rated 7-9

-21.7pp vs 50% benchmark

Poor Condition

6.7%

343 bridges whose lowest applicable component is rated 0-4

-0.3pp vs national avg 7.0%

Montana vs national bridge condition

Montana - Good condition share 28.3%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Montana - Poor-condition share 22.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Montana32.5%59.8%GoodFairPoor
Bridge inventory deck-condition mix - Montana (FHWA NBI)

Counties (56)

Beaverhead 217 Big Horn 136 Blaine 101 Broadwater 31 Carbon 77 Carter 39 Cascade 185 Chouteau 42 Custer 71 Daniels 32 Dawson 109 Deer Lodge 68 Fallon 35 Fergus 155 Flathead 195 Gallatin 207 Garfield 26 Glacier 68 Golden Valley 17 Granite 73 Hill 44 Jefferson 128 Judith Basin 48 Lake 111 Lewis and Clark 196 Liberty 11 Lincoln 190 Madison 84 McCone 44 Meagher 52 Mineral 152 Missoula 205 Musselshell 25 Park 124 Petroleum 26 Phillips 100 Pondera 96 Powder River 23 Powell 112 Prairie 46 Ravalli 149 Richland 96 Roosevelt 57 Rosebud 114 Sanders 116 Sheridan 66 Silver Bow 66 Stillwater 90 Sweet Grass 89 Teton 81 Toole 35 Treasure 26 Valley 103 Wheatland 26 Wibaux 24 Yellowstone 283

Montana vs nearby ranks

Adjacent states by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Montana on the same metric.

NC

North Carolina

6.16% top marginal rate
Structure
Progressive
Burden @ $100K
$18,901

HI

Hawaii

6.47% top marginal rate
Structure
Progressive
Burden @ $100K
$1,206
Selected

MT

Montana

6.70% top marginal rate
Structure
Progressive
Burden @ $100K
$5,122

NY

New York

6.90% top marginal rate
Structure
Progressive
Burden @ $100K
$19,132

KY

Kentucky

7.06% top marginal rate
Structure
Progressive
Burden @ $100K
$14,554

Bridges Needing Most Attention in Montana

Six lowest-condition bridges in Montana, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

HWY 91 N

Poor

Over: BIG HOLE RIVER 041

22M N DILLON, Beaverhead, MT

Built 1940 Load: 2.7 t ADT: 155

SLEEPY HOLLOW LN

Poor

Over: PRICKLY PEAR CREEK

3 M S MONTANA CITY, Jefferson, MT

Built 2010 Load: 2.7 t ADT: 100

CARBINE RD

Poor

Over: PABLO CANAL 026

4M W PABLO, Lake, MT

Built 1986 Load: 2.7 t ADT: 100

BOY SCOUT RD

Poor

Over: CLEARWATER RIVER 082

2M NW SEELEY LAKE, Missoula, MT

Built 1938 Load: 2.7 t ADT: 100

ASHLEY LAKE RD

Poor

Over: PABLO FEEDER CANAL 045

5M NE ST IGNATIUS, Lake, MT

Built 1965 Load: 3.0 t ADT: 100

SHEEP CR RD

Poor

Over: SHEEP CREEK 097

12M S CASCADE, Cascade, MT

Built 1950 Load: 3.6 t ADT: 68

All Bridges in Montana

IRR BIA RTE 8

Fair

Over: CUT BANK CREEK

11 KM NW OF BROWNING, Glacier, MT

Built 1965 Load: 32.7 t ADT: 500

RISING SUN CAMPGRO

Fair

Over: ROES CREEK

6.8 miles southwest from, Glacier, MT

Built 1965 Load: 32.7 t ADT: 1,942

SULLIVAN BRIDGE RD

Fair

Over: MARIAS RIVER 030

14M SE CUTBANK, Glacier, MT

Built 1968 Load: 32.7 t ADT: 100

IRR - S 49

Fair

Over: TWO MEDICINE RIVER 001

3M N EAST GLACIER, Glacier, MT

Built 1966 Load: 32.7 t ADT: 1,926

IRR - US 89

Fair

Over: TWO MEDICINE CANAL

10M SE BROWNING, Glacier, MT

Built 1950 Load: 32.7 t ADT: 1,380

S 213

Fair

Over: S FORK MILK RIVER

30M NW SANTA RITA, Glacier, MT

Built 1973 Load: 32.7 t ADT: 128

DUCK LAKE RD

Fair

Over: DRY FORK MILK RIVER

12M SE BABB, Glacier, MT

Built 1977 Load: 32.7 t ADT: 861

US 12

Fair

Over: NINE MILE CREEK

7M W LAVINA, Golden Valley, MT

Built 1990 Load: 32.7 t ADT: 1,905

S 3

Fair

Over: MUSSELSHELL RIVER

LAVINA, Golden Valley, MT

Built 1959 Load: 32.7 t ADT: 2,052

NO DATA ENTERED

Fair

Over: WEST FORK ROCK CR

WEST FORK ROCK CR, Granite, MT

Built 1965 Load: 32.7 t ADT: 50

S 1

Fair

Over: ABANDONED RAILROAD

DRUMMOND, Granite, MT

Built 1966 Load: 32.7 t ADT: 1,329

IRR BIA RTE 2

Fair

Over: BOX ELDER CREEK

1.3 KM N ROCKY BOYS AGCY, Hill, MT

Built 1992 Load: 32.7 t ADT: 1,400

S 449

Fair

Over: SAGE CREEK

GILDFORD, Hill, MT

Built 1968 Load: 32.7 t ADT: 258

LEGAL TENDER LN

Fair

Over: PRICKLY PEAR CREEK 070

CLANCY, Jefferson, MT

Built 1976 Load: 32.7 t ADT: 100

RAILROAD WAY

Fair

Over: PRICKLY PEAR CREEK 065

CLANCY, Jefferson, MT

Built 1976 Load: 32.7 t ADT: 100

MCCLELLAN CREEK RD

Fair

Over: MCCLELLAN CREEK 021

MONTANA CITY, Jefferson, MT

Built 1975 Load: 32.7 t ADT: 100

TEBAY LN

Fair

Over: JEFFERSON SLOUGH 014

3M W CARDWELL, Jefferson, MT

Built 1991 Load: 32.7 t ADT: 177

YELLOWSTONE TRAIL

Fair

Over: WHITETAIL CREEK 024

WHITEHALL-YELLOWSTONE TRL, Jefferson, MT

Built 1986 Load: 32.7 t ADT: 100

PORCUPINE RIDGE RD

Fair

Over: MID FORK JUDITH RV 035

2M S SAPPHIRE, Judith Basin, MT

Built 2008 Load: 32.7 t ADT: 100

N VALLEY CREEK RD

Fair

Over: JOCKO RIVER 054

2M S RAVALLI, Lake, MT

Built 1970 Load: 32.7 t ADT: 451

N CROW RD

Fair

Over: PABLO FEEDER CANAL 007

3M SE PABLO, Lake, MT

Built 1978 Load: 32.7 t ADT: 100

UNKNOWN

Fair

Over: PRICKELY PEAR CREEK

5M NE HELENA, Lewis and Clark, MT

Built 1940 Load: 32.7 t ADT: 100

WYLIE DR

Fair

Over: HELENA VALLEY CANAL 081

2M N EAST HELENA, Lewis and Clark, MT

Built 1958 Load: 32.7 t ADT: 4,571

SIERRA ROAD E

Fair

Over: PRICKLY PEAR CREEK 077

5M NE HELENA, Lewis and Clark, MT

Built 1998 Load: 32.7 t ADT: 619

RIMINI RD

Fair

Over: TEN MILE CREEK 105

15M SW HELENA, Lewis and Clark, MT

Built 1981 Load: 32.7 t ADT: 230

EDNA CREEK RD

Fair

Over: FORTINE CREEK 132

4M SW TREGO, Lincoln, MT

Built 1983 Load: 32.7 t ADT: 100

SINCLAIR CREEK RD

Fair

Over: SINCLAIR CREEK 160

3M NE EUREKA, Lincoln, MT

Built 1977 Load: 32.7 t ADT: 100

LAKE CREEK RD

Fair

Over: LAKE CREEK 074

4M S TROY, Lincoln, MT

Built 1970 Load: 32.7 t ADT: 100

HOUGHTON CREEK RD

Fair

Over: FISHER RIVER 086

12M W HAPPY`S INN, Lincoln, MT

Built 1985 Load: 32.7 t ADT: 100

MEADOW CREEK RD

Fair

Over: FORTINE CREEK 133

E FORTINE, Lincoln, MT

Built 1989 Load: 32.7 t ADT: 1,203

W 6TH ST

Fair

Over: FLOWER CREEK 004

W EDGE LIBBY, Lincoln, MT

Built 1968 Load: 32.7 t ADT: 1,723

US 2

Fair

Over: LAKE CREEK

1M SE TROY, Lincoln, MT

Built 1989 Load: 32.7 t ADT: 3,987

S 37 FH 57

Fair

Over: FIVE MILE CREEK

12M N LIBBY DAM, Lincoln, MT

Built 1974 Load: 32.7 t ADT: 449

S 37 FH 57

Fair

Over: TEN MILE CREEK

18M N LIBBY DAM, Lincoln, MT

Built 1974 Load: 32.7 t ADT: 324

KOUNTZ RD

Fair

Over: JEFFERSON RIV OVRFLW 016

2M S WHITEHALL, Madison, MT

Built 1977 Load: 32.7 t ADT: 264

LEWIS LN

Fair

Over: RUBY RIVER 021

5M W SHERIDAN, Madison, MT

Built 1975 Load: 32.7 t ADT: 247

COTTONWOOD CREEK R

Fair

Over: RUBY RIVER 061

9M S ALDER, Madison, MT

Built 1984 Load: 32.7 t ADT: 100

SWEETWATER RD

Fair

Over: RUBY RIVER 059

11M S ALDER, Madison, MT

Built 1998 Load: 32.7 t ADT: 100

PRIMROSE LN

Fair

Over: JEFFERSON RIVER OVERFLOW

2M E SILVERSTAR, Madison, MT

Built 1977 Load: 32.7 t ADT: 108

WELDON RD

Fair

Over: REMUDA CREEK 018

30M NW VIDA, McCone, MT

Built 1979 Load: 32.7 t ADT: 100

LINSHIRE RD

Fair

Over: ROCK CREEK 005

35M NW WHITE SULPHUR SPR, Meagher, MT

Built 1981 Load: 32.7 t ADT: 79

CLEAR RANGE RD

Fair

Over: SMITH RIVER 014

CAMP BAKER, Meagher, MT

Built 1976 Load: 32.7 t ADT: 100

SMITH RIVER ROAD

Fair

Over: SHEEP CREEK 003

10M N FORT LOGAN, Meagher, MT

Built 1979 Load: 32.7 t ADT: 131

BIRKY RD

Fair

Over: S FORK SMITH RIVER 028

7M SW WHITE SULPHUR SPR, Meagher, MT

Built 1980 Load: 32.7 t ADT: 31

S 294

Fair

Over: SAWMILL CREEK

15M SW MARTINSDALE, Meagher, MT

Built 1940 Load: 32.7 t ADT: 171

S 294

Fair

Over: S FORK MUSSELSHELL RIVER

MARTINSDALE, Meagher, MT

Built 2010 Load: 32.7 t ADT: 276

I 90

Fair

Over: ST. REGIS RVR-INT RAMP

ST. REGIS, Mineral, MT

Built 1983 Load: 32.7 t ADT: 442

I 90 WB

Fair

Over: RR

9.3M E SUPERIOR, Mineral, MT

Built 1967 Load: 32.7 t ADT: 3,776

I 90

Fair

Over: RR

9.3M W ALBERTON, Mineral, MT

Built 1965 Load: 32.7 t ADT: 4,036

BIG CREEK RD

Fair

Over: ST REGIS RIVER 019

HAUGAN, Mineral, MT

Built 1972 Load: 32.7 t ADT: 100

Showing 2,501-2,550 of 5,122 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

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

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.