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

AUGUSTA-CLEMONS RD

Fair

Over: ELK CREEK 029

2M SW AUGUSTA, Lewis and Clark, MT

Built 1915 Load: 7.3 t ADT: 100

MT 37 FH 57

Fair

Over: SUTTON CREEK

13M S REXFORD, Lincoln, MT

Built 1974 Load: 7.3 t ADT: 324

HORSE CR RD

Fair

Over: FLATHEAD CREEK 020

WILSALL-HORSE CR RD, Park, MT

Built 1912 Load: 7.3 t ADT: 100

ROAD 201

Fair

Over: FOURCHETTE CREEK

SECT 6 T22N R31E, Phillips, MT

Built 1970 Load: 7.3 t ADT: 5

DUPUYER CREEK RD

Fair

Over: DUPUYER CREEK 067

8M SW DUPUYER, Pondera, MT

Built 1938 Load: 7.3 t ADT: 100

COUNTY ROAD 335

Fair

Over: USBR MAIN CANAL 001

8M SW SAVAGE, Richland, MT

Built 1907 Load: 7.3 t ADT: 100

COUNTY ROAD 430

Fair

Over: DUNLAP CREEK 059

3M NW SAVAGE, Richland, MT

Built 1951 Load: 7.3 t ADT: 100

COUNTY ROAD 105

Fair

Over: W BLACKTAIL CREEK 007

6M NE INGOMAR, Rosebud, MT

Built 1940 Load: 7.3 t ADT: 100

BEAVERTON RD

Fair

Over: BEAVER CREEK 104

6M SE SACO, Valley, MT

Built 1915 Load: 7.3 t ADT: 68

NO DATA ENTERED

Fair

Over: TROUT CREEK

NO DATA ENTERED, Mineral, MT

Built 1950 Load: 7.5 t ADT: 50

NO DATA ENTERED

Fair

Over: BLIND CANYON CREEK

NO DATA ENTERED, Missoula, MT

Built 1985 Load: 7.5 t ADT: 50

CUT THROAT DR

Fair

Over: COVE DITCH 015

LAKESIDE ESTATES, Yellowstone, MT

Built 1991 Load: 7.8 t ADT: 100

KELLY CANYON RD

Fair

Over: BRIDGER CREEK 047

6M NE BOZEMAN, Gallatin, MT

Built 1983 Load: 8.1 t ADT: 100

ARMELLS ROAD

Fair

Over: ARMELLS CREEK

11M NE HILGER, Fergus, MT

Built 2022 Load: 8.2 t ADT: 100

BURMA RD

Fair

Over: BIG HOLE RIVER 014

14M NW SHERIDAN, Madison, MT

Built 1987 Load: 8.2 t ADT: 100

CANYON CREEK RD

Fair

Over: BRACKETT CREEK 006

2M SW CLYDE PARK, Park, MT

Built 1975 Load: 8.2 t ADT: 100

MILK RIVER ROAD

Fair

Over: FRENCHMAN CREEK 126

12M NE SACO, Phillips, MT

Built 1950 Load: 8.2 t ADT: 22

BULLHEAD RD

Fair

Over: BIRCH CREEK 022

7M NW VALIER, Pondera, MT

Built 1950 Load: 8.2 t ADT: 100

COUNTY ROAD 119

Fair

Over: BR MAIN CANAL 038

5M NE FALLON, Prairie, MT

Built 1936 Load: 8.2 t ADT: 100

DUTCH HENRY RD

Fair

Over: BEAVER CREEK 073

11M N REDSTONE, Sheridan, MT

Built 1983 Load: 8.2 t ADT: 100

MYERS RD

Fair

Over: YELLOWSTONE RIVER

MYERS, Treasure, MT

Built 1968 Load: 8.7 t ADT: 95

4-H RD

Fair

Over: MUSSELSHELL RIVER 008

SE ROUNDUP, Musselshell, MT

Built 1970 Load: 9.0 t ADT: 528

CORINNE TRAIL

Fair

Over: HORSE PRAIRIE CREEK 043

3M E GRANT, Beaverhead, MT

Built 2022 Load: 9.1 t ADT: 100

COUNTY ROAD 111

Fair

Over: HORSE PRAIRIE CREEK 031

8M W GRANT, Beaverhead, MT

Built 1920 Load: 9.1 t ADT: 100

CEMETARY RD

Fair

Over: T AND Y CANAL 065

1M S MILES CITY, Custer, MT

Built 1978 Load: 9.1 t ADT: 551

MAPLE STREET

Fair

Over: WARM SPRINGS CREEK 011

ANACONDA-MAPLE ST, Deer Lodge, MT

Built 1960 Load: 9.1 t ADT: 100

TEIGEN LOOP

Fair

Over: MCDONALD CREEK 032

S TEIGEN, Petroleum, MT

Built 2012 Load: 9.1 t ADT: 100

DRY FORK RD

Fair

Over: NO NAME DITCH 052

4M E WILLIAMS, Pondera, MT

Built 1950 Load: 9.1 t ADT: 54

STOLTZ RD

Fair

Over: BIRCH CREEK 001

12M W VALIER, Pondera, MT

Built 1976 Load: 9.1 t ADT: 100

E LAKE RD

Fair

Over: PONDERA COULEE 029

15M W CONRAD, Pondera, MT

Built 1960 Load: 9.1 t ADT: 122

PUMPHOUSE RD

Fair

Over: IRRIGATION DITCH 006

1M NW HYSHAM, Treasure, MT

Built 1955 Load: 9.1 t ADT: 168

WILSON RD

Fair

Over: SARPY CREEK 012

22M S HYSHAM, Treasure, MT

Built 1970 Load: 9.1 t

RIVER RD

Fair

Over: SPRING CREEK 023

3M SE LAUREL, Yellowstone, MT

Built 1969 Load: 9.1 t ADT: 100

2ND AVENUE

Fair

Over: BIG SPRING CREEK 060

LEWISTOWN-2ND AVE, Fergus, MT

Built 1930 Load: 9.9 t ADT: 100

YANTIC RD

Fair

Over: RED ROCK COULEE 004

3M NE LOHMAN, Blaine, MT

Built 1933 Load: 10.0 t ADT: 40

COUNTY ROAD 323

Fair

Over: SNAKE CREEK 048

9M S ZURICH, Blaine, MT

Built 1911 Load: 10.0 t ADT: 100

COTTONWOOD CR RD

Fair

Over: N COTTONWOOD CREEK 037

17M NW ALZADA, Carter, MT

Built 1938 Load: 10.0 t ADT: 100

HOPP RD

Fair

Over: EAGLE CREEK 049

20M SE BIG SANDY, Chouteau, MT

Built 1971 Load: 10.0 t ADT: 100

SYCAMORE STREET

Fair

Over: WARM SPRINGS CREEK 009

ANACONDA-SYCAMORE ST, Deer Lodge, MT

Built 1960 Load: 10.0 t ADT: 448

POOR FARM LOOP

Fair

Over: BIG SPRING CREEK

1M NW Lewistown, Fergus, MT

Built 1908 Load: 10.0 t ADT: 100

72 BENCH RD

Fair

Over: WARM SPRINGS CREEK 078

5M N DANVERS, Fergus, MT

Built 1980 Load: 10.0 t ADT: 100

FOREST GROVE RD

Fair

Over: S FORK MCDONALD CR 070

4M SW GRASSRANGE, Fergus, MT

Built 1982 Load: 10.0 t ADT: 146

SINGLE PINE RD

Fair

Over: COTTONWOOD CREEK 028

7M SW LEWISTOWN, Fergus, MT

Built 1989 Load: 10.0 t ADT: 100

DURNAM ROAD

Fair

Over: GALLATIN RIVER

DURNAM BRIDGE, Gallatin, MT

Built 1970 Load: 10.0 t ADT: 99

LOWER COTTONWOOD R

Fair

Over: COTTONWOOD CREEK 028

5M NE CLYDE PARK, Park, MT

Built 1968 Load: 10.0 t ADT: 100

E LAKE RD

Fair

Over: LAKE FRANCIS CANAL 075

3M SE VALIER, Pondera, MT

Built 1960 Load: 10.0 t ADT: 122

KINGSTON MINE RD

Fair

Over: C CANAL 025

1M W VALIER, Pondera, MT

Built 1960 Load: 10.0 t ADT: 100

CAMP CREEK RD

Fair

Over: PUMPKIN CREEK 021

24M NW BROADUS, Powder River, MT

Built 1915 Load: 10.0 t ADT: 100

HINSDALE N RD

Fair

Over: BLUFF CREEK 044

27M W OPHEIM, Valley, MT

Built 1973 Load: 10.0 t ADT: 14

BENGOCHEA RD

Fair

Over: E FK PORCUPINE CREEK 112

20M N NASHUA, Valley, MT

Built 1960 Load: 10.0 t ADT: 100

Showing 751-800 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.