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

W PRYOR RD

Poor

Over: ELBOW CREEK 037

3M W EDGAR, Carbon, MT

Built 1964 Load: 4.5 t ADT: 100

COUNTY ROAD 224

Poor

Over: COAL CREEK 010

16M N PEERLESS, Daniels, MT

Built 1960 Load: 4.5 t ADT: 100

COUNTY ROAD 530

Poor

Over: S FK BURNS CREEK 092

12M NW INTAKE, Dawson, MT

Built 1975 Load: 4.5 t ADT: 100

MT EVANS WAY

Poor

Over: WARM SPRINGS CREEK 016

WARM SPRINGS, Deer Lodge, MT

Built 1912 Load: 4.5 t ADT: 100

6TH AVE S

Poor

Over: BIG SPRING CREEK 133

LEWISTOWN-6TH AVE S, Fergus, MT

Built 1962 Load: 4.5 t ADT: 434

W BROADWAY STREET

Poor

Over: BIG SPRING CREEK 062

LEWISTOWN-W BROADWAY ST, Fergus, MT

Built 1940 Load: 4.5 t ADT: 100

THIRD AVENUE S

Poor

Over: LITTLE CASINO CREEK 138

LEWISTOWN-3RD AVE S, Fergus, MT

Built 2006 Load: 4.5 t ADT: 100

VALLEY RD

Poor

Over: CROW CREEK 066

10M SW RONAN, Lake, MT

Built 1965 Load: 4.5 t ADT: 100

MOUNTAIN VIEW RD

Poor

Over: PABLO FEEDER CANAL 004

6M SE POLSON, Lake, MT

Built 1982 Load: 4.5 t ADT: 100

PISHKUN ROAD

Poor

Over: Sun River

19 miles NW of Augusta, Lewis and Clark, MT

Built 1916 Load: 4.5 t ADT: 40

COUNTY ROAD 128

Poor

Over: MUSSELSHELL RIVER 022

2M NE MARTINSDALE, Meagher, MT

Built 1986 Load: 4.5 t ADT: 100

SUNSET HILL RD

Poor

Over: BLACKFOOT RIVER 088

3M S CLEARWATER JCT, Missoula, MT

Built 1907 Load: 4.5 t ADT: 100

SWINGLEY RD

Poor

Over: W BOULDER RIVER 038

18M E LIVINGSTON, Park, MT

Built 1938 Load: 4.5 t ADT: 52

STRATER RD

Poor

Over: DODSON SOUTH CANAL 116

6M E MALTA, Phillips, MT

Built 1938 Load: 4.5 t ADT: 33

CB ROUTE RD

Poor

Over: BUFFALO RAPIDS CANAL042

5M NE FALLON, Prairie, MT

Built 1939 Load: 4.5 t ADT: 80

WENDEL KINCHELOE R

Poor

Over: RATTLESNAKE CREEK 002

20M NW SUMATRA, Rosebud, MT

Built 1950 Load: 4.5 t ADT: 100

UPPER DEER CR RD

Poor

Over: UPPER DEER CREEK 028

6M SE BIG TIMBER, Sweet Grass, MT

Built 1975 Load: 4.5 t ADT: 100

ROCK CR DAM RD

Poor

Over: ROCK CREEK 098

6M N HINSDALE, Valley, MT

Built 1955 Load: 4.5 t ADT: 100

FOX FARM RD

Poor

Over: ESPEIL COULEE 008

9M E GLASGOW, Valley, MT

Built 1930 Load: 4.5 t ADT: 100

COUNTY ROAD 226

Poor

Over: COAL CREEK 038

13M N RICHLAND, Daniels, MT

Built 1971 Load: 5.4 t ADT: 100

OLD TOWN RD

Poor

Over: JEFFERSON RIVER 063

2M N THREE FORKS, Gallatin, MT

Built 1894 Load: 5.4 t ADT: 100

BIRCH RD

Poor

Over: ROSS FORK CREEK 018

2M NW SIPPLE, Judith Basin, MT

Built 1925 Load: 5.4 t ADT: 15

HOMESTEAD DR

Poor

Over: PINKHAM CREEK 140

9M SW EUREKA, Lincoln, MT

Built 1914 Load: 5.4 t ADT: 100

SILVER SPRING RD

Poor

Over: RUBY RIVER 023

3M S SHERIDAN, Madison, MT

Built 1927 Load: 5.4 t ADT: 131

OLD CAT CREEK RD

Poor

Over: BOX ELDER CREEK 008

5M NE WINNETT, Petroleum, MT

Built 1930 Load: 5.4 t ADT: 100

FRONTAGE RD

Poor

Over: SARPY CREEK 003

4M E HYSHAM, Treasure, MT

Built 1925 Load: 5.4 t ADT: 28

RIVER RD

Poor

Over: IRRIGATION DITCH 005

3M W HYSHAM, Treasure, MT

Built 1979 Load: 5.4 t ADT: 17

BROWNS BRIDGE RD

Poor

Over: BIG HOLE RIVER 123

6.2M S MELROSE, Beaverhead, MT

Built 1915 Load: 6.4 t ADT: 100

COUNTY RD 244

Poor

Over: BEAVER CREEK 132

28M SE MALTA, Phillips, MT

Built 1915 Load: 6.4 t ADT: 100

IRR BIA RTE 13

Poor

Over: SOUTH FORK MILK RIVER

31KM NORTH BLACKFEET SCHL, Glacier, MT

Built 1979 Load: 6.5 t ADT: 60

TRULY CUTOFF RD

Poor

Over: SMITH RIVER 033

7M SE ULM, Cascade, MT

Built 1908 Load: 6.8 t ADT: 100

BIG SWAMP CR RD /

Poor

Over: BIG HOLE RIVER 089

5M NW JACKSON, Beaverhead, MT

Built 1925 Load: 7.3 t ADT: 100

RYAN CANYON RD

Poor

Over: BEAVERHEAD RIVER 023

1.2M S BARRETTS INT, Beaverhead, MT

Built 1908 Load: 7.3 t ADT: 14

HWY 287 BYPASS

Poor

Over: MISSOURI RIVER 019

TOSTON, Broadwater, MT

Built 1920 Load: 7.3 t ADT: 175

MAIDEN ROCK RD

Poor

Over: BRIDGER CREEK 106

3M E BOZEMAN, Gallatin, MT

Built 1940 Load: 7.3 t ADT: 100

PAULSON RD

Poor

Over: PABLO A CANAL 034

5M S POLSON, Lake, MT

Built 1960 Load: 7.3 t ADT: 100

WILLOW RD

Poor

Over: LITTLE BLACKFOOT R 042

E ELLISTON, Powell, MT

Built 1991 Load: 7.3 t ADT: 100

MICHEL CREEK RD

Poor

Over: CAMAS CREEK 002

6M N PERMA, Sanders, MT

Built 1978 Load: 7.3 t ADT: 100

LOVERS LANE

Poor

Over: ELK CREEK 041

S AUGUSTA, Lewis and Clark, MT

Built 1914 Load: 7.8 t ADT: 100

REDROCK RD

Poor

Over: FORT BELKNAP CANAL 008

3M NW CHINOOK, Blaine, MT

Built 1933 Load: 8.2 t ADT: 211

ALKALI RD

Poor

Over: ALKALI CREEK 001

7M SW MALTA, Phillips, MT

Built 1920 Load: 8.2 t ADT: 100

MCLEOD MAIN ST

Poor

Over: WEST BOULDER RIVER 025

MCLEOD, Sweet Grass, MT

Built 1912 Load: 8.2 t ADT: 100

FDR #9202

Poor

Over: MOOSE CREEK

MOOSE CREEK CAMPGROUND D7, Meagher, MT

Built 1959 Load: 8.4 t ADT: 50

RANDALL RD

Poor

Over: TWO LEGGIN`S CANAL 015

3M SW HARDIN, Big Horn, MT

Built 1940 Load: 9.1 t ADT: 100

WELCH RD

Poor

Over: TWO MEDICINE CANAL 016

12M SW CUT BANK, Glacier, MT

Built 1960 Load: 9.1 t ADT: 100

POTTER CREEK RD

Poor

Over: POTTER CREEK 005

1M N WILSALL, Park, MT

Built 1915 Load: 9.1 t ADT: 100

CHOKECHERRY LN

Poor

Over: LITTLE BLACKFOOT R 027

4M SW AVON, Powell, MT

Built 1914 Load: 9.1 t ADT: 19

1ST AVE

Poor

Over: SIXTEENMILE CREEK 029

RINGLING, Meagher, MT

Built 1976 Load: 9.3 t ADT: 100

HUGHES LN

Poor

Over: FLATWILLOW CREEK 016

16M S WINNETT, Petroleum, MT

Built 1950 Load: 10.0 t ADT: 100

PUGSLEY RD

Poor

Over: MARIAS RIVER 006

18M SW CHESTER, Liberty, MT

Built 1951 Load: 10.9 t ADT: 100

Showing 4,801-4,850 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.