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

BURMA RD

Good

Over: BIG HOLE RIVER OVER 062

1M SE GLEN, Madison, MT

Built 2000 Load: 25.4 t ADT: 100

LOISELLE LN

Good

Over: FRENCHTOWN IRR CANAL 099

3M S FRENCHTOWN, Missoula, MT

Built 1960 Load: 25.4 t ADT: 201

HUSON RD

Good

Over: INT HUSON-I 90 012

HUSON, Missoula, MT

Built 1971 Load: 25.4 t ADT: 386

WELTER DIVIDE RD

Good

Over: BOX ELDER CREEK 010

13M NE TEIGEN, Petroleum, MT

Built 1994 Load: 25.4 t ADT: 100

SKYVIEW RD S

Good

Over: DRY FK MARIAS RIVER 069

6M SE DUPUYER, Pondera, MT

Built 1987 Load: 25.4 t ADT: 100

COUNTY ROAD 129

Good

Over: USBR MAIN CANAL 067

6M SW FAIRVIEW, Richland, MT

Built 2015 Load: 25.4 t ADT: 81

COUNTY ROAD 128

Good

Over: USBR MAIN CANAL 089

4M N SIDNEY, Richland, MT

Built 1997 Load: 25.4 t ADT: 100

ACORN FLATS RD

Good

Over: BIG PORCUPINE CR 005

13M NE INGOMAR, Rosebud, MT

Built 2007 Load: 25.4 t ADT: 100

MCVEY-MCALPINE RD

Good

Over: INT MCVEY CO ROAD 006

3M SE SWEETGRASS, Toole, MT

Built 1977 Load: 25.4 t ADT: 22

SHERROD LN

Good

Over: FLY CREEK 142

2M SW POMPEY`S PILLAR, Yellowstone, MT

Built 1973 Load: 25.4 t ADT: 100

BITTERROOT DR

Good

Over: FIVE MILE CREEK 119

N BILLINGS HEIGHTS, Yellowstone, MT

Built 1999 Load: 25.4 t ADT: 1,563

STRAUCH RD

Good

Over: BBWA CANAL 063

1M E LAUREL, Yellowstone, MT

Built 2014 Load: 25.4 t ADT: 100

US 89

Good

Over: GREENFIELDS SOUTH CANAL

3M SE FAIRFIELD, Teton, MT

Built 1983 Load: 25.4 t ADT: 1,787

S 13

Good

Over: EAST FORK POPLAR RIVER

4M N SCOBEY, Daniels, MT

Built 1957 Load: 25.4 t ADT: 224

S 13

Good

Over: EAST FORK POPLAR RIVER

8M N SCOBEY, Daniels, MT

Built 1957 Load: 25.4 t ADT: 42

S 3

Good

Over: BIG COULEE CREEK

1M S LAVINA, Golden Valley, MT

Built 1959 Load: 25.4 t ADT: 2,052

NYE RD-S 419

Good

Over: W ROSEBUD CREEK OVERFLOW

FISHTAIL, Stillwater, MT

Built 1991 Load: 25.4 t ADT: 1,544

SS-11A

Good

Over: SWAN RIVER 111

LINDBERGH LAKE ROAD, Missoula, MT

Built 1978 Load: 25.5 t ADT: 100

NO DATA ENTERED

Good

Over: MOOSE CREEK

NO DATA ENTERED, Ravalli, MT

Built 2007 Load: 25.6 t ADT: 40

NO DATA ENTERED

Good

Over: NFSR 5758 AND NFSR 725

NO DATA ENTERED, Ravalli, MT

Built 2008 Load: 25.6 t ADT: 25

NFSR 233

Good

Over: M FK BEAVER CREEK

BEAVER CREEK NO. 4, Lewis and Clark, MT

Built 1978 Load: 25.6 t ADT: 26

BIG SHEEP CR RD

Good

Over: BIG SHEEP CREEK 015

3M S DELL, Beaverhead, MT

Built 2016 Load: 25.6 t ADT: 175

NO DATA ENTERED

Good

Over: BENDER CR.

NO DATA ENTERED, Beaverhead, MT

Built 2002 Load: 25.9 t ADT: 10

NO DATA ENTERED

Good

Over: FISH CR

PAST PIGION CREEK CG, Silver Bow, MT

Built 1986 Load: 25.9 t ADT: 40

FOREST ROAD

Good

Over: TRAIL CREEK

TRAIL CREEK, Flathead, MT

Built 1981 Load: 25.9 t ADT: 10

FOREST ROAD

Good

Over: CREEK

NORTH FORK LOST CREEK, Lake, MT

Built 2005 Load: 25.9 t ADT: 30

NFSR 330

Good

Over: COPPER CREEK

COPPER CREEK, Lewis and Clark, MT

Built 2008 Load: 25.9 t ADT: 169

NFSR #251

Good

Over: DRY WOLF CREEK

15 MI. SW OF STANFORD, Judith Basin, MT

Built 1994 Load: 25.9 t ADT: 40

NO DATA ENTERED

Good

Over: WEST FORK DRY CREEK

W FK DRY CR, Sanders, MT

Built 1992 Load: 25.9 t ADT: 40

I 15

Good

Over: LITTLE PRICKLY PEAR CR

9M S WOLF CREEK, Lewis and Clark, MT

Built 1965 Load: 25.9 t ADT: 2,383

NFSR 8840

Good

Over: N.F. HIGHWOOD

NO DATA ENTERED, Chouteau, MT

Built 2001 Load: 26.2 t ADT: 40

NFSR 8840

Good

Over: N.F. HIGHWOOD CREEK

NO DATA ENTERED, Chouteau, MT

Built 2001 Load: 26.2 t ADT: 40

ROAD 4209

Good

Over: NORTH CREEK

NORTH CREEK, Missoula, MT

Built 2008 Load: 26.2 t ADT: 40

BREWER RD

Good

Over: TIMBER CREEK 017

2M E POWDERVILLE, Powder River, MT

Built 1996 Load: 26.2 t ADT: 100

N 55

Good

Over: PIPESTONE CREEK

1M W WHITEHALL, Jefferson, MT

Built 2018 Load: 26.3 t ADT: 2,874

US 287

Good

Over: MUD SPRING GULCH

5M NW THREE FORKS, Broadwater, MT

Built 2013 Load: 26.3 t ADT: 6,238

W ENNIS ST

Good

Over: MOORES CREEK

W ENNIS ST - ENNIS, Madison, MT

Built 2017 Load: 26.3 t ADT: 100

S 8TH RD

Good

Over: HUNTLEY MAIN CANAL

4M NE HUNTLEY, Yellowstone, MT

Built 2020 Load: 26.3 t ADT: 164

SHIELDS RIVER ROAD

Good

Over: IRRIGATION CANAL

5M SE CLYDE PARK, Park, MT

Built 2019 Load: 26.3 t ADT: 100

MISSION DAM ROAD

Good

Over: MISSION CREEK

2M E ST IGNATIUS, Lake, MT

Built 2021 Load: 26.3 t ADT: 100

I 15

Good

Over: INT JACKSON-HWY 278

3.7M S DILLON, Beaverhead, MT

Built 1982 Load: 26.3 t ADT: 2,826

I 15

Good

Over: INT TRASK-LOWLAND RD

8M N BUTTE, Jefferson, MT

Built 1976 Load: 26.3 t ADT: 1,556

I 90

Good

Over: INT WARM SPRINGS

WARM SPRINGS, Deer Lodge, MT

Built 1978 Load: 26.3 t ADT: 5,740

I 90

Good

Over: INT WARM SPRINGS

WARM SPRINGS, Deer Lodge, MT

Built 1978 Load: 26.3 t ADT: 5,053

I 90

Good

Over: CLARK FORK RIVER

2.5M N OPPORTUNITY, Deer Lodge, MT

Built 1978 Load: 26.3 t ADT: 5,053

I 90

Good

Over: INT WEST BIG TIMBER

1.2M W BIG TIMBER, Sweet Grass, MT

Built 1981 Load: 26.3 t ADT: 6,078

RAMP TO W I 90

Good

Over: SHILOH INTERCHANGE

BILLINGS, Yellowstone, MT

Built 2001 Load: 26.3 t ADT: 2,039

BLACK BRIDGE RD

Good

Over: LITTLE BIGHORN RIVER 024

3M SW WYOLA, Big Horn, MT

Built 1998 Load: 26.3 t ADT: 100

COUNTY ROAD 007

Good

Over: MILK RIVER 014

1M N LOHMAN, Blaine, MT

Built 1997 Load: 26.3 t ADT: 125

ISMAY RD

Good

Over: O`FALLON CREEK 002

20M NW EKALAKA, Carter, MT

Built 1994 Load: 26.3 t ADT: 100

Showing 3,601-3,650 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.