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

NO DATA ENTERED

Poor

Over: BOULDER CR

BOULDER CREEK, Granite, MT

Built 1949 Load: 19.1 t ADT: 50

NFSR #487

Poor

Over: S FK JUDITH RIVER

18 MI SW OF UTICA, Judith Basin, MT

Built 1958 Load: 19.1 t ADT: 65

NFSR #487

Poor

Over: S FK JUDITH RIVER

19 MI. SW OF UTICA, Judith Basin, MT

Built 1958 Load: 19.1 t ADT: 65

IRR - US 191

Poor

Over: WILD HORSE CREEK

20M SW MALTA, Phillips, MT

Built 1940 Load: 19.1 t ADT: 375

CRAIG FRONTAGE RD

Poor

Over: MISSOURI RIVER 054

2M NE WOLF CREEK, Lewis and Clark, MT

Built 1933 Load: 20.0 t ADT: 390

SHIELDS RIVER RD E

Poor

Over: SHIELDS RIVER OVERFL 022

8M NE LIVINGSTON, Park, MT

Built 1938 Load: 20.0 t ADT: 100

OLD US 10

Poor

Over: BIG DITCH 051

4M W LAUREL, Yellowstone, MT

Built 1932 Load: 20.0 t ADT: 2,474

NFSR 487

Poor

Over: S FK JUDITH RIVER

18.6 MI. SW FROM UTICA, Cascade, MT

Built 1958 Load: 20.1 t ADT: 65

NFSR #487

Poor

Over: S FK JUDITH RIVER

19 MI SW OF UTICA, Judith Basin, MT

Built 1958 Load: 20.1 t ADT: 65

NFSR #487

Poor

Over: S FK JUDITH RIVER

19 MI. SW OF UTICA, Judith Basin, MT

Built 1958 Load: 20.1 t ADT: 65

NFSR 495

Poor

Over: TELEGRAPH CREEK

TELEGRAPH-TELEGRAPH, Lewis and Clark, MT

Built 1950 Load: 20.1 t ADT: 30

384 SPAR LAKE RD.

Poor

Over: SPAR CR

2.1 MI PAST CAMPGROUND, Lincoln, MT

Built 1955 Load: 20.1 t ADT: 10

STEVES FORK RD

Poor

Over: STEVES FORK CREEK 003

15M NW JORDAN, Garfield, MT

Built 1980 Load: 20.4 t ADT: 100

MCCLELLEAN CK ROAD

Poor

Over: MCCLELLAN CREEK

MCCLELLAN, Jefferson, MT

Built 1959 Load: 20.4 t ADT: 40

CPGD ACCESS

Poor

Over: TEN MILE CREEK

MOOSE CR CAMP GD., Lewis and Clark, MT

Built 1957 Load: 20.4 t ADT: 20

NO DATA ENTERED

Poor

Over: W FK MADISON RIVER

W FK MADISON RIVER, Madison, MT

Built 1947 Load: 20.4 t ADT: 50

S MAIN AVE

Poor

Over: MISSION CREEK 052

ST IGNATIUS-S MAIN ST, Lake, MT

Built 1929 Load: 20.5 t ADT: 2,220

TEMPLED HILLS RD.

Poor

Over: MILL CREEK

S. OF LIVINGSTON, Park, MT

Built 1952 Load: 20.7 t ADT: 50

BOINTER RD

Poor

Over: SWEET GRASS CREEK 044

9M SE BIG TIMBER, Sweet Grass, MT

Built 1970 Load: 20.8 t ADT: 100

OLD HWY 87

Poor

Over: TWO LEGGIN'S CANAL 0

1M W HARDIN, Big Horn, MT

Built 1931 Load: 20.9 t ADT: 561

FRONTAGE ROAD 205

Poor

Over: SNELL CREEK 073

17M SW MILES CITY, Custer, MT

Built 1928 Load: 20.9 t ADT: 100

S 200

Poor

Over: DRAINAGE

14M W BROCKWAY, McCone, MT

Built 1939 Load: 20.9 t ADT: 1,012

ROAD 317

Poor

Over: DRAG CREEK

SECT 11 T18N R29E, Petroleum, MT

Built 1963 Load: 20.9 t ADT: 2

STAGE RD

Poor

Over: SPRING COULEE 024

20M S DODSON, Phillips, MT

Built 1965 Load: 20.9 t ADT: 100

MILWAUKEE RD

Poor

Over: YELLOWSTONE RIVER 030

4M SW TERRY, Prairie, MT

Built 1907 Load: 20.9 t ADT: 54

FDR 606

Poor

Over: BIRCH CR

BIRCH CR, Beaverhead, MT

Built 1954 Load: 21.1 t ADT: 40

NO DATA ENTERED

Poor

Over: N F LOSTHORSE CR

NO DATA ENTERED, Ravalli, MT

Built 1953 Load: 21.1 t ADT: 40

US 191

Poor

Over: FISH CREEK

14M S HARLOWTON, Wheatland, MT

Built 1942 Load: 21.4 t ADT: 657

NO DATA ENTERED

Poor

Over: WILLOW CR

WILLOW CR, Beaverhead, MT

Built 1954 Load: 21.7 t ADT: 20

NO DATA ENTERED

Poor

Over: ROCK CREEK

NO DATA ENTERED, Carbon, MT

Built 1954 Load: 21.7 t ADT: 50

BIG CREEK ROAD

Poor

Over: BIG CREEK

S. OF LIVINGSTON, Park, MT

Built 1961 Load: 21.7 t ADT: 50

RED ROCK RD

Poor

Over: LIMEKILN CANYON 022

7M NW DELL, Beaverhead, MT

Built 1931 Load: 21.8 t ADT: 119

EAGLE PASS TRAIL

Poor

Over: PABLO FEEDER CANAL 104

9M NE ST IGNATIUS, Lake, MT

Built 1977 Load: 21.8 t ADT: 100

DALTON MNT RD

Poor

Over: BLACKFOOT RIVER 095

3M W LINCOLN, Lewis and Clark, MT

Built 1956 Load: 21.8 t ADT: 111

S 223

Poor

Over: MARIAS RIVER

18M SE CHESTER, Liberty, MT

Built 1966 Load: 21.8 t ADT: 268

US 2

Poor

Over: BIG CHERRY CREEK

3M SW LIBBY, Lincoln, MT

Built 1976 Load: 21.8 t ADT: 5,592

OLD HWY 10 E

Poor

Over: ST REGIS RIVER 059

ST REGIS, Mineral, MT

Built 1937 Load: 21.8 t ADT: 119

IRR - US 191

Poor

Over: WILD HORSE CREEK

20M SW MALTA, Phillips, MT

Built 1941 Load: 21.8 t ADT: 375

COUNTY ROAD 001

Poor

Over: HARDSCRABBLE CREEK 041

35M NW SIDNEY, Richland, MT

Built 1945 Load: 21.8 t ADT: 100

FRONTAGE ROAD 018

Poor

Over: IRRIGATION DITCH 001

1M E HYSHAM, Treasure, MT

Built 1933 Load: 21.8 t ADT: 279

WHALE CREEK ROAD

Poor

Over: WHALE CREEK

1 MI SW NINKO CABIN, Flathead, MT

Built 1954 Load: 22.4 t ADT: 10

FDR 624

Poor

Over: RUBY CR

RUBY CR, Beaverhead, MT

Built 1952 Load: 22.7 t ADT: 20

STIBAL LN

Poor

Over: RED ROCK RIVER 053

9M NE MONIDA, Beaverhead, MT

Built 1975 Load: 22.7 t ADT: 100

MT HWY 91

Poor

Over: RR

3M SW DILLON, Beaverhead, MT

Built 1936 Load: 22.7 t ADT: 582

FOREST ROAD

Poor

Over: GRAVES CREEK

GRAVES CREEK AREA, Flathead, MT

Built 1970 Load: 22.7 t ADT: 10

MT 55

Poor

Over: FISH CREEK

9M SW WHITEHALL, Jefferson, MT

Built 1953 Load: 22.7 t ADT: 1,799

S FRONTAGE RD W

Poor

Over: CLARK FORK 053

2M W ALBERTON, Mineral, MT

Built 1916 Load: 22.7 t ADT: 171

S 474

Poor

Over: RR

4M SE FRENCHTOWN, Missoula, MT

Built 1959 Load: 22.7 t ADT: 1,371

IRR - S 358

Poor

Over: TWO MEDICINE RIVER

12M S CUT BANK, Pondera, MT

Built 1968 Load: 22.7 t ADT: 242

OLD HWY 2

Poor

Over: BEAVER CREEK 115

5M W HINSDALE, Valley, MT

Built 1931 Load: 22.7 t ADT: 100

Showing 4,901-4,950 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.