State profile · Near median Poor share

Montana bridge safety

According to the Federal Highway Administration's 2024 National Bridge Inventory, condition ratings, load ratings, and Poor-condition shares for every public highway bridge in Montana.

5,224
Public bridges
31.5%
Good condition
6.8%
Poor condition

Montana holds 5,224 public highway bridges (#36 of 52 by inventory) with a 6.81% Poor share (#20 of 52 by Poor share).

That is 6.8% of the state's inventory, against an average of 7.5% across the 54 states and territories with Poor-rated bridges on file, which places it 33 of 54 ordered from the lowest Poor share upward. A bridge is rated Poor when its weakest applicable component scores 4 or below on the inspecting agency's 0-9 scale, so the category is a maintenance and funding signal rather than a closure order or a live crossing-safety verdict.

Inventory: FHWA NBI 2024 · last ETL August 2026

Total Bridges

5,224

Public highway bridges in Montana

Good Condition

31.5%

1,646 bridges rated 7-9

-18.5pp vs 50% benchmark

Poor Condition

6.8%

356 bridges whose lowest applicable component is rated 0-4

-0.7pp vs national avg 7.5%

Montana vs national bridge condition

Montana - Good condition share 31.5%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Montana - Poor-condition share 22.7%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.

Montana in the national condition pattern

Each point is a state or territory in the FHWA NBI; the highlighted point is this profile.

Inventory size and Poor-condition share are different measures: Montana has 5,224 bridges and a 6.8% Poor-condition share in the 2024 NBI, rank #33 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold. Scatter plot of 54 data points. 0%10%20%30%40% 0k20k40k60k Public bridges in inventory (thousands) Poor-condition share (%) MT, Public bridges in inventory (thousands): 5.2k · Poor-condition share (%): 6.81%AL, Public bridges in inventory (thousands): 16.2k · Poor-condition share (%): 3.35%AK, Public bridges in inventory (thousands): 1.7k · Poor-condition share (%): 7.89%AZ, Public bridges in inventory (thousands): 8.6k · Poor-condition share (%): 1.15%AR, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 5.43%CA, Public bridges in inventory (thousands): 25.8k · Poor-condition share (%): 5.91%CO, Public bridges in inventory (thousands): 9k · Poor-condition share (%): 4.82%CT, Public bridges in inventory (thousands): 4.4k · Poor-condition share (%): 4.72%DE, Public bridges in inventory (thousands): 0.9k · Poor-condition share (%): 1.26%DC, Public bridges in inventory (thousands): 0.3k · Poor-condition share (%): 1.95%FL, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 2.79%GA, Public bridges in inventory (thousands): 15.1k · Poor-condition share (%): 1.59%GU, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 12.77%HI, Public bridges in inventory (thousands): 1.2k · Poor-condition share (%): 6.53%ID, Public bridges in inventory (thousands): 4.6k · Poor-condition share (%): 4.9%IL, Public bridges in inventory (thousands): 26.9k · Poor-condition share (%): 9.35%IN, Public bridges in inventory (thousands): 19.5k · Poor-condition share (%): 5.22%IA, Public bridges in inventory (thousands): 23.7k · Poor-condition share (%): 19.16%KS, Public bridges in inventory (thousands): 24.9k · Poor-condition share (%): 5.26%KY, Public bridges in inventory (thousands): 14.5k · Poor-condition share (%): 7.37%LA, Public bridges in inventory (thousands): 12.7k · Poor-condition share (%): 11.48%ME, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 15.41%MD, Public bridges in inventory (thousands): 5.5k · Poor-condition share (%): 4.56%MA, Public bridges in inventory (thousands): 5.3k · Poor-condition share (%): 8.88%MI, Public bridges in inventory (thousands): 11.4k · Poor-condition share (%): 11.27%MN, Public bridges in inventory (thousands): 13.5k · Poor-condition share (%): 4.44%MS, Public bridges in inventory (thousands): 16.7k · Poor-condition share (%): 6.03%MO, Public bridges in inventory (thousands): 24.6k · Poor-condition share (%): 8.95%NE, Public bridges in inventory (thousands): 15.4k · Poor-condition share (%): 7.9%NV, Public bridges in inventory (thousands): 2.1k · Poor-condition share (%): 1.14%NH, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 7.51%NJ, Public bridges in inventory (thousands): 6.8k · Poor-condition share (%): 6.01%NM, Public bridges in inventory (thousands): 4k · Poor-condition share (%): 4.51%NY, Public bridges in inventory (thousands): 17.6k · Poor-condition share (%): 9.43%NC, Public bridges in inventory (thousands): 19.2k · Poor-condition share (%): 6.76%ND, Public bridges in inventory (thousands): 4.3k · Poor-condition share (%): 10.98%OH, Public bridges in inventory (thousands): 26.7k · Poor-condition share (%): 4.74%OK, Public bridges in inventory (thousands): 22.9k · Poor-condition share (%): 7.7%OR, Public bridges in inventory (thousands): 8.3k · Poor-condition share (%): 4.61%PA, Public bridges in inventory (thousands): 23.3k · Poor-condition share (%): 12.58%PR, Public bridges in inventory (thousands): 2.4k · Poor-condition share (%): 13.92%RI, Public bridges in inventory (thousands): 0.8k · Poor-condition share (%): 15.2%SC, Public bridges in inventory (thousands): 9.5k · Poor-condition share (%): 6.17%SD, Public bridges in inventory (thousands): 5.9k · Poor-condition share (%): 16.36%TN, Public bridges in inventory (thousands): 20.4k · Poor-condition share (%): 4.41%TX, Public bridges in inventory (thousands): 56.7k · Poor-condition share (%): 1.23%UT, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 2.91%VT, Public bridges in inventory (thousands): 2.9k · Poor-condition share (%): 2.9%VI, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 29.17%VA, Public bridges in inventory (thousands): 14.1k · Poor-condition share (%): 3.39%WA, Public bridges in inventory (thousands): 8.5k · Poor-condition share (%): 5.45%WV, Public bridges in inventory (thousands): 7.3k · Poor-condition share (%): 18.64%WI, Public bridges in inventory (thousands): 14.4k · Poor-condition share (%): 6.52%WY, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 6.51%
Inventory size and Poor-condition share are different measures: Montana has 5,224 bridges and a 6.8% Poor-condition share in the 2024 NBI, rank #33 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold.

Montana vs all states by public bridge inventory

Where this state's FHWA NBI public-highway bridge count sits among every state and territory on PlainBridges

5,224 36th of 54 higher than 18 of 54 states

States and territories, banded by public bridge inventory size

Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source FHWA National Bridge Inventory · 2024

Read the rank neighborhood for Montana

The highlighted point is Montana: 5,224 bridges and 6.81% in Poor condition, rank #33 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below Montana on that same Poor-share ordering:

  • Hawaii: 1,195 bridges · 6.53% Poor
  • North Carolina: 19,210 bridges · 6.76% Poor
  • Montana: 5,224 bridges · 6.81% Poor
  • Kentucky: 14,548 bridges · 7.37% Poor
  • New Hampshire: 2,542 bridges · 7.51% Poor

The full national sortable table lives on the rankings page.

Material families in Montana

Exclusive FHWA material families across all 5,224 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.

Who maintains Montana’s inventory

State agency holds 46.3% of the 5,224 public highway bridges filed under Montana in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.

When Montana’s bridges were built

Pre-1950 construction accounts for 11.7% of the 5,224 bridges with a recorded original year in Montana. Era bands are orthogonal to the Poor-share ranking above.

Condition Distribution

Montana31.5%61.7%GoodFairPoor
Bridge inventory deck-condition mix - Montana (FHWA NBI)

Counties (56)

Beaverhead 226 Big Horn 135 Blaine 102 Broadwater 37 Carbon 80 Carter 41 Cascade 185 Chouteau 42 Custer 71 Daniels 33 Dawson 109 Deer Lodge 68 Fallon 37 Fergus 158 Flathead 204 Gallatin 210 Garfield 26 Glacier 71 Golden Valley 17 Granite 73 Hill 46 Jefferson 134 Judith Basin 48 Lake 117 Lewis and Clark 200 Liberty 11 Lincoln 190 Madison 97 McCone 44 Meagher 53 Mineral 152 Missoula 206 Musselshell 28 Park 124 Petroleum 26 Phillips 101 Pondera 96 Powder River 23 Powell 113 Prairie 46 Ravalli 148 Richland 97 Roosevelt 57 Rosebud 114 Sanders 120 Sheridan 66 Silver Bow 68 Stillwater 92 Sweet Grass 94 Teton 82 Toole 35 Treasure 26 Valley 104 Wheatland 26 Wibaux 25 Yellowstone 290

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.

HI

Hawaii

6.53% top marginal rate
Structure
Progressive
Burden @ $100K
$1,195

NC

North Carolina

6.76% top marginal rate
Structure
Progressive
Burden @ $100K
$19,210
Selected

MT

Montana

6.81% top marginal rate
Structure
Progressive
Burden @ $100K
$5,224

KY

Kentucky

7.37% top marginal rate
Structure
Progressive
Burden @ $100K
$14,548

NH

New Hampshire

7.51% top marginal rate
Structure
Progressive
Burden @ $100K
$2,542

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.

UPPER HIGHWOOD CR

Poor

Over: HIGHWOOD CREEK 076

4M SE HIGHWOOD, Chouteau, MT

Built 1969 Load: 0.0 t ADT: 100

ROAD 290 N

Poor

Over: CANADIAN COULEE 036

30M N INVERNESS, Hill, MT

Built 1980 Load: 0.0 t ADT: 100

BLACK COULEE RD

Poor

Over: BLACK COULEE 072

28M N DODSON, Phillips, MT

Built 1950 Load: 0.0 t ADT: 49

SLEEPY HOLLOW LN

Poor

Over: PRICKLY PEAR CREEK

3 M S MONTANA CITY, Jefferson, MT

Built 2010 Load: 2.7 t ADT: 100

HWY 91 N

Poor

Over: BIG HOLE RIVER 041

22M N DILLON, Beaverhead, MT

Built 1940 Load: 2.7 t ADT: 155

CARBINE RD

Poor

Over: PABLO CANAL 026

4M W PABLO, Lake, MT

Built 1986 Load: 2.7 t ADT: 100

All Bridges in Montana

BIG SHEEP CR RD

Fair

Over: BIG SHEEP CREEK 122

5.6M SW DELL, Beaverhead, MT

Built 1985 Load: 32.7 t ADT: 175

W BOEHS RD

Fair

Over: TWO LEGGIN`S CANAL 049

3M NW HARDIN, Big Horn, MT

Built 1996 Load: 32.7 t ADT: 100

COUNTY ROAD 103

Fair

Over: HANGING WOMAN CREEK 056

24M NE DECKER, Big Horn, MT

Built 1986 Load: 32.7 t ADT: 331

LOMBARD RD

Fair

Over: BROADWATER MISSOURI 018

1M SE TOSTON, Broadwater, MT

Built 1976 Load: 32.7 t ADT: 100

SIXMILE RD

Fair

Over: BROADWATER CANAL 016

2M N TOSTON, Broadwater, MT

Built 1976 Load: 32.7 t ADT: 100

GREAVES RD

Fair

Over: BROADWATER MISSOURI 017

1M N TOSTON, Broadwater, MT

Built 1976 Load: 32.7 t ADT: 100

FERRY ST

Fair

Over: BROADWATER MISSOURI 020

TOSTON, Broadwater, MT

Built 1980 Load: 32.7 t ADT: 100

BOYD COONEY DAM RD

Fair

Over: COONEY RES SPILLWAY 014

7M W BOYD, Carbon, MT

Built 1982 Load: 32.7 t ADT: 564

RED LODGE CR RD

Fair

Over: E RED LODGE CREEK 010

8M W ROBERTS, Carbon, MT

Built 1970 Load: 32.7 t ADT: 100

TWO MILE BRIDGE RD

Fair

Over: ROCK CREEK 024

2M N RED LODGE, Carbon, MT

Built 1982 Load: 32.7 t ADT: 100

JOLIET FROMBERG RD

Fair

Over: ELBOW CREEK 035

2M SE JOLIET, Carbon, MT

Built 1979 Load: 32.7 t ADT: 173

CARBON AVE

Fair

Over: ROCK CREEK 026

1M E ROBERTS, Carbon, MT

Built 1982 Load: 32.7 t ADT: 100

E PRYOR RD

Fair

Over: CLARKS FK YELLOWSTNE 056

E EDGAR, Carbon, MT

Built 1980 Load: 32.7 t ADT: 411

E BRIDGER RD

Fair

Over: CLARKS FK YELLOWSTNE 055

E BRIDGER, Carbon, MT

Built 1980 Load: 32.7 t ADT: 258

GOLDEN LN

Fair

Over: CLARKS FK YELLOWSTNE 008

6M SW BRIDGER, Carbon, MT

Built 1981 Load: 32.7 t ADT: 100

POWERLINE RD

Fair

Over: DRAINAGE 025

9M N GREAT FALLS, Cascade, MT

Built 1931 Load: 32.7 t ADT: 100

HUGHESVILLE RD

Fair

Over: DRY FORK BELT CREEK 077

E MONARCH, Cascade, MT

Built 1962 Load: 32.7 t ADT: 100

HUGHESVILLE RD

Fair

Over: DRY FORK BELT CREEK 078

2M E MONARCH, Cascade, MT

Built 1962 Load: 32.7 t ADT: 100

HUGHESVILLE RD

Fair

Over: DRY FORK BELT CREEK 080

4M E MONARCH, Cascade, MT

Built 1962 Load: 32.7 t ADT: 100

HUGHESVILLE RD

Fair

Over: DRY FORK BELT CREEK 103

7M E MONARCH, Cascade, MT

Built 1962 Load: 32.7 t ADT: 100

ADEL RD

Fair

Over: W FORK HOUND CREEK 120

19M SE CASCADE, Cascade, MT

Built 1950 Load: 32.7 t ADT: 100

FRENCH LN

Fair

Over: POPLAR RIVER OVERFLO 015

4M NW SCOBEY, Daniels, MT

Built 1978 Load: 32.7 t ADT: 99

ROAD 106

Fair

Over: KRUG CREEK 074

10M E GLENDIVE, Dawson, MT

Built 1951 Load: 32.7 t ADT: 100

COUNTY ROAD 317

Fair

Over: USBR MAIN CANAL 073

4M NE INTAKE, Dawson, MT

Built 2001 Load: 32.7 t ADT: 4

COUNTY ROAD 500

Fair

Over: S FORK LISK CREEK 070

4M N RICHEY, Dawson, MT

Built 1984 Load: 32.7 t ADT: 63

NORTH CABLE RD

Fair

Over: WARM SPRINGS CREEK 021

NW ANACONDA, Deer Lodge, MT

Built 1983 Load: 32.7 t ADT: 668

W RIVER RD

Fair

Over: CLARK FORK RIVER 014

6M N WARM SPRINGS, Deer Lodge, MT

Built 1981 Load: 32.7 t ADT: 100

DY TRAIL

Fair

Over: DOG CREEK 110

E WINIFRED, Fergus, MT

Built 1962 Load: 32.7 t ADT: 167

TOGNETTI RD

Fair

Over: ROSS FORK 038

5M NW MOORE, Fergus, MT

Built 1995 Load: 32.7 t ADT: 100

CRABTREE RD

Fair

Over: DRY WOLF CREEK 092

5M SE DENTON, Fergus, MT

Built 1962 Load: 32.7 t ADT: 100

MEADOW LAKE BLVD

Fair

Over: RR 120

COLUMBIA FALLS, Flathead, MT

Built 1988 Load: 32.7 t ADT: 2,754

SUNNYSIDE DR

Fair

Over: ASHLEY CREEK 100

1M SW KALISPELL, Flathead, MT

Built 1988 Load: 32.7 t ADT: 100

SMITH LAKE RD

Fair

Over: ASHLEY CREEK 007

10M W KALISPELL, Flathead, MT

Built 1988 Load: 32.7 t ADT: 100

CHURCH DR

Fair

Over: STILLWATER RIVER 089

5M NW KALISPELL, Flathead, MT

Built 1978 Load: 32.7 t ADT: 100

GOOD CREEK RD

Fair

Over: STILLWATER RIVER 176

1M S OLNEY, Flathead, MT

Built 1981 Load: 32.7 t ADT: 182

COUNTY ROAD 882

Fair

Over: GOOD CREEK 079

7M SW OLNEY, Flathead, MT

Built 1988 Load: 32.7 t ADT: 100

STAR MEADOW RD

Fair

Over: LOGAN CREEK 175

19M SW OLNEY, Flathead, MT

Built 1981 Load: 32.7 t ADT: 198

MARTIN CAMP RD

Fair

Over: STILLWATER RIVER 081

5M SE OLNEY, Flathead, MT

Built 1991 Load: 32.7 t ADT: 100

SIXTEEN MILE ROAD

Fair

Over: SIXTEEN MILE CREEK 070

MAUDLOW, Gallatin, MT

Built 1974 Load: 32.7 t ADT: 100

W CAMERON BR RD

Fair

Over: GALLATIN RIVER 048

1M SW BELGRADE, Gallatin, MT

Built 2007 Load: 32.7 t ADT: 100

COTTONWOOD RD

Fair

Over: S COTTONWOOD CREEK 123

3.5M SE GALLATIN GATEWAY, Gallatin, MT

Built 2014 Load: 32.7 t ADT: 100

COTTONWOOD ROAD

Fair

Over: S COTTONWOOD CREEK 124

3.6M SE GALLATIN GATEWAY, Gallatin, MT

Built 2014 Load: 32.7 t ADT: 100

CHAPMAN RD

Fair

Over: HYALITE CREEK 049

5M SW BOZEMAN, Gallatin, MT

Built 2014 Load: 32.7 t ADT: 100

JOHNSON ROAD

Fair

Over: HYALITE CREEK 125

6M SW BOZEMAN, Gallatin, MT

Built 2014 Load: 32.7 t ADT: 100

SULLIVAN BRIDGE RD

Fair

Over: MARIAS RIVER 030

14M SE CUTBANK, Glacier, MT

Built 1968 Load: 32.7 t ADT: 100

IRR - S 49

Fair

Over: TWO MEDICINE RIVER 001

3M N EAST GLACIER, Glacier, MT

Built 1966 Load: 32.7 t ADT: 1,926

LEGAL TENDER LN

Fair

Over: PRICKLY PEAR CREEK 070

CLANCY, Jefferson, MT

Built 1976 Load: 32.7 t ADT: 100

RAILROAD WAY

Fair

Over: PRICKLY PEAR CREEK 065

CLANCY, Jefferson, MT

Built 1976 Load: 32.7 t ADT: 100

MCCLELLAN CREEK RD

Fair

Over: MCCLELLAN CREEK 021

MONTANA CITY, Jefferson, MT

Built 1975 Load: 32.7 t ADT: 100

TEBAY LN

Fair

Over: JEFFERSON SLOUGH 014

3M W CARDWELL, Jefferson, MT

Built 1991 Load: 32.7 t ADT: 177

Showing 2,151-2,200 of 5,224 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.

What to do with this

Use Montana's inventory picture to drill to a county or a specific span.

  • Browse counties in Montana and open the highest-Poor shares first. County list
  • See where this state sits among peers on Poor-condition share. State rankings
  • Compare this state with another jurisdiction on the same measures. State compare

NBI condition ratings are inventory snapshots, not live crossing-safety verdicts.

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Montana Good/Fair/Poor shares and county rollups on this page are computed from the same NBI extract as the national boards; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.