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

FOYS BEND LN

Fair

Over: ASHLEY CREEK 003

2M SE KALISPELL, Flathead, MT

Built 2001 Load: 16.5 t ADT: 100

RUBY ROAD

Fair

Over: MIDDLE FK RUBY RIVE

M FK RUBY RIVER, Madison, MT

Built 1947 Load: 16.5 t ADT: 50

FDR 204

Fair

Over: MOOSE CREEK

1.3 MI NE RD 119/204 JCT, Meagher, MT

Built 1956 Load: 16.5 t ADT: 50

OLIES RD

Fair

Over: WOLF CREEK 088

6M E DENTON, Fergus, MT

Built 1983 Load: 16.8 t ADT: 100

NO DATA ENTERED

Fair

Over: ST REGIS RIVER

NO DATA ENTERED, Mineral, MT

Built 1940 Load: 16.8 t ADT: 50

NO DATA ENTERED

Fair

Over: VERMILION RIVER

NO DATA ENTERED, Sanders, MT

Built 1956 Load: 16.8 t ADT: 50

FDR 182

Fair

Over: MINER CR

MINER CR, Beaverhead, MT

Built 1947 Load: 17.2 t ADT: 50

PARADISE VALLEY RD

Fair

Over: SIX MILE CREEK 028

4M SE CHINOOK, Blaine, MT

Built 1975 Load: 17.2 t ADT: 100

S 323

Fair

Over: BOX ELDER CREEK

17M SE EKALAKA, Carter, MT

Built 1957 Load: 17.2 t ADT: 314

E HIGHWOOD RD

Fair

Over: BELT CREEK 002

8M N BELT, Cascade, MT

Built 1935 Load: 17.2 t ADT: 100

CENTRAL AVE

Fair

Over: BELT CREEK 084

ARMINGTON, Cascade, MT

Built 1938 Load: 17.2 t ADT: 284

15TH ST N-US 87

Fair

Over: MISSOURI R-RIVERS TRAIL

GREAT FALLS-15TH ST N, Cascade, MT

Built 1962 Load: 17.2 t ADT: 13,743

ROAD 261

Fair

Over: IRRIGATION CANAL 041

13M SW GLENDIVE, Dawson, MT

Built 1920 Load: 17.2 t ADT: 21

COUNTY ROAD 526

Fair

Over: N FK BURNS CREEK 062

13M N INTAKE, Dawson, MT

Built 1930 Load: 17.2 t ADT: 100

COUNTY ROAD 532

Fair

Over: COTTONWOOD CREEK 018

10M E CIRCLE, Dawson, MT

Built 1938 Load: 17.2 t ADT: 100

S 569

Fair

Over: MILL CREEK 040

4M SE ANACONDA, Deer Lodge, MT

Built 1950 Load: 17.2 t ADT: 562

ERLE LN

Fair

Over: DOG CREEK 102

SUFFOLK, Fergus, MT

Built 1981 Load: 17.2 t ADT: 100

GOING-TO-THE-SUN R

Fair

Over: AVALANCHE CREEK

17 miles northeast of U.S, Flathead, MT

Built 1935 Load: 17.2 t ADT: 1,230

OLD US 2 E

Fair

Over: ABBOT CREEK 063

MARTIN CITY, Flathead, MT

Built 1931 Load: 17.2 t ADT: 100

IRR - US 2

Fair

Over: BEAR CREEK

5M SE ESSEX, Flathead, MT

Built 1966 Load: 17.2 t ADT: 1,929

IRR - US 2

Fair

Over: BEAR CREEK

4M SW SUMMIT, Flathead, MT

Built 1966 Load: 17.2 t ADT: 1,929

I 90

Fair

Over: JEFFERSON RIVER OVERFLOW

THREE FORKS, Gallatin, MT

Built 1969 Load: 17.2 t ADT: 8,465

SIXTEEN MILE ROAD

Fair

Over: SIXTEEN MILE CREEK 071

2M E MAUDLOW, Gallatin, MT

Built 1954 Load: 17.2 t ADT: 100

PINE BUTTE RD

Fair

Over: HIGHLINE CANAL 116

6M S BELGRADE, Gallatin, MT

Built 1987 Load: 17.2 t ADT: 100

LITTLE BEAR RD

Fair

Over: BIG BEAR CREEK 118

4M S GALLATIN GATEWAY, Gallatin, MT

Built 1987 Load: 17.2 t ADT: 100

S 543

Fair

Over: VAIL CREEK

2M N JORDAN, Garfield, MT

Built 1976 Load: 17.2 t ADT: 77

TEBAY LN

Fair

Over: JEF RIV OVERFLOW 013

3M W CARDWELL, Jefferson, MT

Built 2003 Load: 17.2 t ADT: 177

S 200

Fair

Over: DEARBORN RIVER

25M SW SIMMS, Lewis and Clark, MT

Built 1949 Load: 17.2 t ADT: 1,382

DEEP CREEK ROAD

Fair

Over: DEEP CR

DEEP CR, Lincoln, MT

Built 1958 Load: 17.2 t ADT: 50

SINCLAIR CREEK RD

Fair

Over: SINCLAIR CREEK 127

2M NE EUREKA, Lincoln, MT

Built 1977 Load: 17.2 t ADT: 100

US 2

Fair

Over: KOOTENAI RIVER-RR

2M NW TROY, Lincoln, MT

Built 1942 Load: 17.2 t ADT: 2,402

S BOULDER RD

Fair

Over: UPR S BOULDER RIVER 055

4M S JEFFERSON ISLAND, Madison, MT

Built 2003 Load: 17.2 t ADT: 100

S 200

Fair

Over: TIMBER CREEK

19M W BROCKWAY, McCone, MT

Built 1939 Load: 17.2 t ADT: 1,012

DEAN CREEK RD

Fair

Over: MUSSELSHELL RIVER 004

15M SW ROUNDUP, Musselshell, MT

Built 1988 Load: 17.2 t ADT: 100

FORKS RD

Fair

Over: STINKY CREEK 109

10M NW SACO, Phillips, MT

Built 1988 Load: 17.2 t ADT: 100

S 243

Fair

Over: WHITEWATER CREEK

10 M NW SACO, Phillips, MT

Built 1976 Load: 17.2 t ADT: 39

WILLIAMS RD

Fair

Over: NO NAME DITCH 053

WILLIAMS, Pondera, MT

Built 1960 Load: 17.2 t ADT: 54

HILLSIDE RD

Fair

Over: NO NAME DITCH 049

1M W CONRAD, Pondera, MT

Built 1960 Load: 17.2 t ADT: 100

PRIMROSE RD N

Fair

Over: PONDERA COULEE 018

4M NE CONRAD, Pondera, MT

Built 1979 Load: 17.2 t ADT: 100

KOHRS ST

Fair

Over: COTTONWOOD CREEK 065

DEER LODGE-KOHRS ST, Powell, MT

Built 2003 Load: 17.2 t ADT: 100

OLD HWY 10 E

Fair

Over: RR 046

1M W FALLON, Prairie, MT

Built 1934 Load: 17.2 t ADT: 504

FRONTAGE ROAD 114

Fair

Over: YELLOWSTONE RIVER 015

1M NE FALLON, Prairie, MT

Built 1945 Load: 17.2 t ADT: 100

GRANTSDALE RD

Fair

Over: SKALKAHO CR OVERFLOW 040

GRANTSDALE, Ravalli, MT

Built 1935 Load: 17.2 t ADT: 471

IRR - S 344

Fair

Over: SHEEP CREEK

1M W FROID, Roosevelt, MT

Built 1956 Load: 17.2 t ADT: 196

US 12

Fair

Over: DRAINAGE

25M NW FORSYTH, Rosebud, MT

Built 1940 Load: 17.2 t ADT: 144

TROUT CREEK RD

Fair

Over: TROUT CREEK 025

2M W TROUT CREEK, Sanders, MT

Built 1982 Load: 17.2 t ADT: 100

S REDSTONE RD

Fair

Over: WOLF CREEK 040

12M S REDSTONE, Sheridan, MT

Built 1950 Load: 17.2 t ADT: 64

E BOULDER RD

Fair

Over: E BOULDER RIVER 034

6M S MCLEOD, Sweet Grass, MT

Built 1971 Load: 17.2 t ADT: 100

7TH LN NE

Fair

Over: DRAINAGE 128

12M NW POWER, Teton, MT

Built 1978 Load: 17.2 t ADT: 27

1-LANE ROAD

Fair

Over: WEST FORK ROCK CREEK

11 MILES W. OF RED LODGE, Carbon, MT

Built 1956 Load: 17.5 t ADT: 50

Showing 951-1,000 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.