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

HAMMOND CREEK RD

Poor

Over: ROCK CREEK 025

5M E CLYDE PARK, Park, MT

Built 1967 Load: 10.9 t ADT: 100

YOUTH RANCH RD

Poor

Over: WHITEWATER CREEK 110

8M S WHITEWATER, Phillips, MT

Built 1977 Load: 10.9 t ADT: 100

REGINA RD

Poor

Over: BEAVER CREEK 049

23M S MALTA, Phillips, MT

Built 1983 Load: 10.9 t ADT: 42

HOG RANCH RD

Poor

Over: BIG WARM CREEK 026

24M S DODSON, Phillips, MT

Built 1960 Load: 10.9 t ADT: 100

IRR BIA RTE 209

Poor

Over: ROSEBUD CREEK

8.1 KM WEST OF LAME DEER, Big Horn, MT

Built 1971 Load: 11.3 t ADT: 100

SOAP CREEK RD

Poor

Over: BIG HORN CANAL 009

11M SW ST XAVIER, Big Horn, MT

Built 1946 Load: 11.5 t ADT: 63

ROAD 238

Poor

Over: CLEAR CREEK 027

19M W GLENDIVE, Dawson, MT

Built 1979 Load: 11.8 t ADT: 50

BEAUTY CREEK RD

Poor

Over: DIRTY CREEK 047

3M W BROCKWAY, McCone, MT

Built 1938 Load: 11.8 t ADT: 100

NFSR 839

Poor

Over: BELT CREEK

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

Built 1954 Load: 12.7 t ADT: 46

COUNTY ROAD 098

Poor

Over: CLARK FORK RIVER 020

2M N WARM SPRINGS, Deer Lodge, MT

Built 1920 Load: 12.7 t ADT: 100

LIL BITTERROOT RD

Poor

Over: LITTLE BITTERROOT R 061

7M NE HOT SPRINGS, Lake, MT

Built 1965 Load: 12.7 t ADT: 100

CANYON RD

Poor

Over: SMITH RIVER 002

8M NW WHITE SULPHUR SPR, Meagher, MT

Built 1957 Load: 12.7 t ADT: 100

ELK CREEK RD

Poor

Over: SHIELDS RIVER 018

3M NE WILSALL, Park, MT

Built 1960 Load: 12.7 t ADT: 100

NO DATA ENTERED

Poor

Over: SUNDAY CREEK

NO DATA ENTERED, Lincoln, MT

Built 1998 Load: 13.0 t ADT: 25

IRR BIA RTE 205

Poor

Over: UPPER LODGE GRASS CREEK

6.8 KM NW JCT 205 & 418, Big Horn, MT

Built 1994 Load: 13.1 t ADT: 12

MIDDLE RD

Poor

Over: BATTLE CREEK 056

4M N CHINOOK, Blaine, MT

Built 1920 Load: 13.2 t ADT: 100

NORTH AVE W

Poor

Over: BITTERROOT RIVER 010

W MISSOULA, Missoula, MT

Built 1935 Load: 13.6 t ADT: 3,605

MERIDIAN RD

Poor

Over: BEAR CREEK 015

2M S VICTOR, Ravalli, MT

Built 1936 Load: 13.6 t ADT: 100

HENTGES RD

Poor

Over: LITTLE PORCUPINE CR 064

FRAZER-HENTGES RD, Valley, MT

Built 1965 Load: 13.6 t ADT: 100

STAGECOACH TRL RD

Poor

Over: BAKER CREEK 082

2M NW BELGRADE, Gallatin, MT

Built 1959 Load: 14.5 t ADT: 100

SHIELDS RIVER RD E

Poor

Over: SHIELDS RIVER 023

8M NE LIVINGSTON, Park, MT

Built 1923 Load: 14.5 t ADT: 100

LOWER HARB RD

Poor

Over: BEAVER CREEK 092

14M E MALTA, Phillips, MT

Built 1968 Load: 14.5 t ADT: 100

8TH LN NE

Poor

Over: GREENFIELD SO CANAL 039

8M NE FAIRFIELD, Teton, MT

Built 1966 Load: 14.5 t ADT: 100

FDR 7391

Poor

Over: NO DATA ENTERED

NO DATA ENTERED, Beaverhead, MT

Built 1987 Load: 14.6 t ADT: 5

NO DATA ENTERED

Poor

Over: ROCK CR

NO DATA ENTERED, Sanders, MT

Built 1954 Load: 14.9 t ADT: 50

NO DATA ENTERED

Poor

Over: WISE RIVER

SHEEP CR., Beaverhead, MT

Built 1992 Load: 15.2 t ADT: 6

SEIFERT RD

Poor

Over: PABLO A CANAL 083

6M SW POLSON, Lake, MT

Built 1960 Load: 15.4 t ADT: 100

OLD HWY 10 W

Poor

Over: CLARK FORK 054

3M W ALBERTON, Mineral, MT

Built 1932 Load: 15.4 t ADT: 349

MONTFORT RD

Poor

Over: BUFFALO COULEE 108

1M S VANDALIA, Valley, MT

Built 1950 Load: 15.4 t ADT: 23

STATION ROAD

Poor

Over: BOULDER RIVER

BOX CANYON ADMIN SITE, Park, MT

Built 1947 Load: 15.6 t ADT: 1

FDR #8983

Poor

Over: N FK SUN RIVER

HANNAN GULCH, Lewis and Clark, MT

Built 1927 Load: 15.9 t ADT: 99

COUNTY ROAD 542

Poor

Over: THIRTEEN MILE CR 061

5M NW INTAKE, Dawson, MT

Built 1964 Load: 16.3 t ADT: 100

BENTONITE RD

Poor

Over: VANDALIA SOUTH CANAL 089

4M W GLASGOW, Valley, MT

Built 1938 Load: 16.3 t ADT: 100

524 MEADOW CR. RD.

Poor

Over: N F MEADOW CR

.1 MILE PAST JCT 5961, Lincoln, MT

Built 1953 Load: 16.5 t ADT: 25

FOREST ROAD

Poor

Over: HAND CREEK

SYLVIA LAKE ROAD, Flathead, MT

Built 2010 Load: 16.8 t ADT: 50

NO DATA ENTERED

Poor

Over: VERMILION RIVER

SEVEN POINT MTN, Sanders, MT

Built 1959 Load: 16.8 t ADT: 50

AXTELL ANCENY RD

Poor

Over: GALLATIN RIVER 084

2M N GALLATIN GATEWAY, Gallatin, MT

Built 1919 Load: 17.2 t ADT: 289

ROCKY BUTTE RD

Poor

Over: CROW CREEK 070

2M SW RONAN, Lake, MT

Built 1986 Load: 17.2 t ADT: 126

NFSR #487

Poor

Over: S FK JUDITH RIVER

15 MI. SW OF UTICA, Judith Basin, MT

Built 1958 Load: 18.1 t ADT: 65

HARVEY RD

Poor

Over: MUSSELSHELL RIVER 018

3M SW MELSTONE, Musselshell, MT

Built 1916 Load: 18.1 t ADT: 100

W LAKE RD

Poor

Over: BIG MUDDY CREEK 046

3M W MEDICINE LAKE, Sheridan, MT

Built 1950 Load: 18.1 t ADT: 68

6TH LN NE

Poor

Over: DRAINAGE 129

13M SW DUTTON, Teton, MT

Built 1974 Load: 18.1 t ADT: 100

CARLYLE RD E

Poor

Over: BEAVER CREEK

6M W CARLYLE, Wibaux, MT

Built 1960 Load: 18.1 t ADT: 38

RD 343-2

Poor

Over: S FK FISH CREEK

FISH CR LOLO CR, Mineral, MT

Built 1966 Load: 18.5 t ADT: 50

FISH CR RD

Poor

Over: W FK FISH CREEK

FISH CR LOLO CR, Mineral, MT

Built 1966 Load: 18.5 t ADT: 50

CANYON CR ROAD

Poor

Over: CANYON CR

CANYON CR, Beaverhead, MT

Built 1952 Load: 18.8 t ADT: 50

FISH CR RD

Poor

Over: S FK FISH CREEK

FISH CR LOLO CR, Mineral, MT

Built 1965 Load: 18.8 t ADT: 50

EKEGREN RD

Poor

Over: THIRTY MILE CREEK 097

3M E HARLEM, Blaine, MT

Built 1938 Load: 19.0 t ADT: 100

S 529-CLEAR CR RD

Poor

Over: MILK RIVER

1M W CHINOOK, Blaine, MT

Built 1967 Load: 19.1 t ADT: 254

FDR 267

Poor

Over: JEFFERSON CREEK

0.1 MI EAST US89/267 JCT, Cascade, MT

Built 1957 Load: 19.1 t ADT: 50

Showing 4,851-4,900 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.