State profile · Near national median SD

Montana bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Montana — drawn straight from the FHWA National Bridge Inventory.

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

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 rated 0-4

Structurally Deficient

6.7%

343 bridges flagged for repair priority

-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 — Structurally deficient share 22.3%
National avg

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

Condition Distribution

Bridge inventory deck-condition mix — Montana (FHWA NBI)

Montana28.25068332682546%52.08902772354549%GoodFairPoorStructurally Deficient
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 on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Montana on the same metric.

37

North Carolina

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

15

Hawaii

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

30

Montana

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

36

New York

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

21

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 composite NBI rating. Each is inspected at least every 24 months.

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

Structurally Deficient

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

Structurally Deficient

Over: SHEEP CREEK 097

12M S CASCADE, Cascade, MT

Built 1950 Load: 3.6 t ADT: 68

All Bridges in Montana

9TH LN NW

Fair

Over: SPRING VALLEY CANAL 047

13M NW FAIRFIELD, Teton, MT

Built 1975 Load: 23.6 t ADT: 100

4TH LN NE

Fair

Over: GREENFIELD CANAL 044

5M NE FAIRFIELD, Teton, MT

Built 1982 Load: 23.6 t ADT: 100

S 565

Fair

Over: GREENFIELD SOUTH CANAL

7M N SIMMS, Teton, MT

Built 1969 Load: 23.6 t ADT: 449

I 15

Fair

Over: RR

1M N SUNBURST, Toole, MT

Built 1977 Load: 23.6 t ADT: 862

IRR - US 2

Fair

Over: INDIAN SERVICE CANAL

FRAZER, Valley, MT

Built 1960 Load: 23.6 t ADT: 1,438

IRR - S 24

Fair

Over: DRAINAGE

15M S OPHEIM, Valley, MT

Built 1939 Load: 23.6 t ADT: 290

TAMPICO RD

Fair

Over: CHERRY CREEK OVERFLOW

1M W GLASGOW, Valley, MT

Built 1960 Load: 23.6 t ADT: 478

US 191

Fair

Over: DRAINAGE

12M S HARLOWTON, Wheatland, MT

Built 1942 Load: 23.6 t ADT: 702

I 94

Fair

Over: HUNTLEY CANAL

2.5M W POMPEYS PILLAR, Yellowstone, MT

Built 1968 Load: 23.6 t ADT: 2,577

FLY CREEK RD

Fair

Over: FLY CREEK 139

4M SW POMPAY`S PILLAR, Yellowstone, MT

Built 1960 Load: 23.6 t ADT: 100

DUCK CREEK RD

Fair

Over: DUCK CREEK 022

SW BILLINGS, Yellowstone, MT

Built 1967 Load: 23.6 t ADT: 100

US 87

Fair

Over: YELLOWSTONE RIVER

BILLINGS-DICK JOHNSTON BR, Yellowstone, MT

Built 1993 Load: 23.6 t ADT: 23,275

FOREST ROAD

Fair

Over: SKYLAND CREEK

SKYLAND CREEK AREA, Flathead, MT

Built 1963 Load: 23.7 t ADT: 20

GUT CREEK RD

Fair

Over: PINKHAM CR

PINKHAM CR, Lincoln, MT

Built 1968 Load: 23.7 t ADT: 50

FROZEN LAKE ROAD

Fair

Over: WEASEL CR

WEASEL CR, Lincoln, MT

Built 1957 Load: 23.7 t ADT: 50

331 RABBIT OBRIEN

Fair

Over: OBRIEN CR

BETWEEN JCTS W/4445 LOOP, Lincoln, MT

Built 1980 Load: 23.7 t ADT: 40

W FK CLEARWATER RD

Fair

Over: CLEARWATER RIVER

W FK CLEARWATER RIV, Missoula, MT

Built 1951 Load: 23.7 t ADT: 40

HOMER DAVIS RD

Fair

Over: TWELVE MILE CREEK 041

4M SW SHEPHERD, Yellowstone, MT

Built 1999 Load: 23.7 t ADT: 100

VAN HOUTEN ROAD

Fair

Over: PIONEER CR

PIONEER CR, Beaverhead, MT

Built 1981 Load: 24.0 t ADT: 25

RED MDW CR ROAD

Fair

Over: CHAIN CREEK

2 MI E RED MDW LAKE, Flathead, MT

Built 1966 Load: 24.0 t ADT: 10

FOREST ROAD

Fair

Over: RED MEADOW CREEK

9 MI W OF NORTH FORK RD, Flathead, MT

Built 1966 Load: 24.0 t ADT: 20

RD 763

Fair

Over: FISHER RIV & RR OVERPASS

FISHER RIVER AT JENNINGS, Lincoln, MT

Built 1968 Load: 24.0 t ADT: 50

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

NO DATA ENTERED, Powell, MT

Built 2010 Load: 24.0 t ADT: 40

NO DATA ENTERED

Fair

Over: LITTLE WEST FORK CR

NO DATA ENTERED, Ravalli, MT

Built 1968 Load: 24.0 t ADT: 5

VICTOR CROSSING W

Fair

Over: BITTERROOT RIVER 021

1M E VICTOR, Ravalli, MT

Built 2000 Load: 24.0 t ADT: 100

Canton Lane

Fair

Over: Eastside Canal

3 mi NE of Townsend MT, Broadwater, MT

Built 1974 Load: 24.3 t ADT: 5

CROW CREEK ROAD

Fair

Over: CROW CREEK

CROW CREEK 1, Broadwater, MT

Built 1967 Load: 24.3 t ADT: 50

CENTENNIAL AVE

Fair

Over: RR 015

W SIDE BUTTE, Silver Bow, MT

Built 1955 Load: 24.3 t ADT: 2,189

N LOCATE RD

Fair

Over: LOCATE CREEK 045

3M N LOCATE, Custer, MT

Built 1901 Load: 24.4 t ADT: 23

S 1 FH 17

Fair

Over: WARM SPRINGS CREEK

7M W ANACONDA, Deer Lodge, MT

Built 1930 Load: 24.4 t ADT: 2,043

STORY MILL RD

Fair

Over: BRIDGER CREEK 088

2M N BOZEMAN, Gallatin, MT

Built 1978 Load: 24.4 t ADT: 100

ROAD 100 S

Fair

Over: BIG SANDY CREEK 019

10M N BOX ELDER, Hill, MT

Built 1963 Load: 24.4 t ADT: 29

NELSON RD

Fair

Over: BEAVER CREEK 121

NELSON, Lewis and Clark, MT

Built 1975 Load: 24.4 t ADT: 233

LAKE CREEK RD

Fair

Over: FORTINE CREEK 141

7M S TREGO, Lincoln, MT

Built 1969 Load: 24.4 t ADT: 726

S 467-UNION RD

Fair

Over: HELL CREEK

2M S CIRCLE, McCone, MT

Built 1962 Load: 24.4 t ADT: 126

OLD CLYDE PARK RD

Fair

Over: FERRY CREEK 037

2M NE LIVINGSTON, Park, MT

Built 1938 Load: 24.4 t ADT: 673

POPLAR RIVER RD

Fair

Over: POPLAR RIVER 013

NE EDGE POPLAR, Roosevelt, MT

Built 1957 Load: 24.4 t ADT: 659

ROSEBUD CREEK RD

Fair

Over: ROSEBUD CREEK 047

10M SE COLSTRIP, Rosebud, MT

Built 1983 Load: 24.4 t ADT: 38

SAND CREEK RD

Fair

Over: SAND CREEK 031

9M NE ROSEBUD, Rosebud, MT

Built 1925 Load: 24.4 t ADT: 100

OLD US 10

Fair

Over: COVE DITCH 015

7M SE COLUMBUS, Stillwater, MT

Built 1928 Load: 24.4 t ADT: 1,607

OLD US 10

Fair

Over: ALLEN CREEK 016

7M W PARK CITY, Stillwater, MT

Built 1928 Load: 24.4 t ADT: 1,607

SWEETWATER RD

Fair

Over: EAST BENCH CANAL 060

3M E DILLON, Beaverhead, MT

Built 1962 Load: 24.5 t ADT: 100

IRR BIA RTE 91

Fair

Over: ROTTEN GRASS CREEK

0.8 KM SW OF ST. XAVIER, Big Horn, MT

Built 1970 Load: 24.5 t ADT: 350

IRR BIA RTE 205

Fair

Over: LITTLE BIG HORN RIVER

0.4KM NW OF JCT 205 & 418, Big Horn, MT

Built 1993 Load: 24.5 t ADT: 80

IRR - S 313

Fair

Over: BIGHORN RIVER

7M SW HARDIN, Big Horn, MT

Built 1958 Load: 24.5 t ADT: 1,049

IRR BIA RTE 8

Fair

Over: PEOPLES CREEK

22.5 KM SW OF DODSON, Blaine, MT

Built 1976 Load: 24.5 t ADT: 200

BAGAN RD

Fair

Over: BATTLE CREEK 060

3M E CHINOOK, Blaine, MT

Built 1940 Load: 24.5 t ADT: 83

KLINDWORTH RD

Fair

Over: WOODY ISLAND COULEE 136

5M N HOGELAND, Blaine, MT

Built 2001 Load: 24.5 t ADT: 100

CENTRAL AVE W

Fair

Over: DRAINAGE 117

HARLEM, Blaine, MT

Built 1939 Load: 24.5 t ADT: 581

US 2

Fair

Over: DRAINAGE

1M E CHINOOK, Blaine, MT

Built 1940 Load: 24.5 t ADT: 2,254

Showing 1,501-1,550 of 5,122 bridges

Related

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

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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

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.