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

CHEVALLIER DR

Fair

Over: LITTLE PRICKLY PEAR 109

7M SW SIEBEN INT, Lewis and Clark, MT

Built 1905 Load: 4.5 t ADT: 37

MCDONALD LN

Fair

Over: LTL PRICKLY PEAR CRK 151

3M W CANYON CREEK, Lewis and Clark, MT

Built 1990 Load: 4.5 t ADT: 100

VUKONICH LN

Fair

Over: GRAVE CREEK 007

4M N FORTINE, Lincoln, MT

Built 1950 Load: 4.5 t ADT: 100

SUNDANCE BENCH RD

Fair

Over: MADISON RIVER 046

31M S ENNIS, Madison, MT

Built 1902 Load: 4.5 t ADT: 100

COUNTY ROAD 055

Fair

Over: DODSON NORTH CANAL 013

W DODSON, Phillips, MT

Built 1986 Load: 4.5 t ADT: 5

NNN RD

Fair

Over: MCGINNIS CREEK 004

13M N INGOMAR, Rosebud, MT

Built 1986 Load: 4.5 t ADT: 100

LEE CREEK RD

Fair

Over: HANGING WOMAN CREEK 074

2M S BIRNEY, Rosebud, MT

Built 1940 Load: 4.5 t ADT: 100

LEE CREEK RD

Fair

Over: HANGING WOMAN CREEK 075

5M S BIRNEY, Rosebud, MT

Built 1981 Load: 4.5 t ADT: 100

TWIN BRIDGES RD

Fair

Over: ANTELOPE CREEK 055

1M E ANTELOPE, Sheridan, MT

Built 2008 Load: 4.5 t ADT: 100

RIVER RD

Fair

Over: IRRIGATION DITCH 020

2M W HYSHAM, Treasure, MT

Built 1978 Load: 4.5 t ADT: 17

BRIDGE LN

Fair

Over: WARM SPRINGS CREEK 005

1M W ANACONDA, Deer Lodge, MT

Built 2001 Load: 4.5 t ADT: 100

ASHBOUGH TRAIL

Fair

Over: RED ROCK RIVER 086

KIDD, Beaverhead, MT

Built 1909 Load: 5.4 t ADT: 15

ANDERSON LN

Fair

Over: BEAVERHEAD RIVER 071

5M NE DILLON, Beaverhead, MT

Built 1930 Load: 5.4 t ADT: 53

ROOSEVELT PARKWAY

Fair

Over: KOOTENAI RIVER 070

E EDGE TROY, Lincoln, MT

Built 1912 Load: 5.4 t ADT: 100

COAL CAMP RD

Fair

Over: SHIELDS RIVER 015

8M NE WILSALL, Park, MT

Built 1975 Load: 5.4 t ADT: 100

INDIAN CREEK RD

Fair

Over: SHIELDS RIVER 027

2M S WILSALL, Park, MT

Built 1920 Load: 5.4 t ADT: 100

COTTONWOOD BENCH R

Fair

Over: COTTONWOOD CREEK 030

10M S WILSALL, Park, MT

Built 1908 Load: 5.4 t ADT: 100

PETROLIA BENCH RD

Fair

Over: MCDONALD CREEK 003

9M E WINNETT, Petroleum, MT

Built 1940 Load: 5.4 t ADT: 58

BRIDGE RD

Fair

Over: MUSSELSHELL RIVER 001

15M NW SUMATRA, Rosebud, MT

Built 1930 Load: 5.4 t ADT: 100

SAND CREEK RD

Fair

Over: CARTERSVILLE CANAL 030

9M NE ROSEBUD, Rosebud, MT

Built 1935 Load: 5.4 t ADT: 100

LAUREL AIRPORT RD

Fair

Over: BIG DITCH 044

3M NE LAUREL, Yellowstone, MT

Built 1950 Load: 5.4 t ADT: 876

MAIN ST

Fair

Over: MCDONALD CREEK 015

WINNETT-MAIN ST, Petroleum, MT

Built 1940 Load: 5.4 t ADT: 98

N 7TH AVE-FRTG RD

Fair

Over: RR - MRL

BOZEMAN-N SEVENTH AVE, Gallatin, MT

Built 1993 Load: 5.4 t ADT: 6,077

DEER CREEK TRLHD.

Fair

Over: GALLATIN RIVER

GALLATIN CANYON, Gallatin, MT

Built 1970 Load: 5.8 t ADT: 99

ROE LN

Fair

Over: RED ROCK 121

W RED ROCK, Beaverhead, MT

Built 1913 Load: 6.4 t ADT: 4

STEEL BRIDGE LN

Fair

Over: RED ROCK RIVER 084

4M NW LIMA, Beaverhead, MT

Built 1915 Load: 6.4 t ADT: 74

COUNTY ROAD 143

Fair

Over: UNNAMED CREEK 059

34M E DECKER, Big Horn, MT

Built 1950 Load: 6.4 t ADT: 100

BLUEWATER RD

Fair

Over: BLUEWATER CREEK 038

3M SE FROMBERG, Carbon, MT

Built 1915 Load: 6.4 t ADT: 100

WILLIAMS BR RD

Fair

Over: JEFFERSON RIVER 046

5M SW WILLOW CREEK, Gallatin, MT

Built 1898 Load: 6.4 t ADT: 85

HORSE CR RD

Fair

Over: SHIELDS RIVER 021

E WILSALL-HORSE CR RD, Park, MT

Built 1986 Load: 6.4 t ADT: 100

SPRING CREEK RD

Fair

Over: CABIN CREEK 011

13M NE MILDRED, Prairie, MT

Built 1933 Load: 6.4 t ADT: 100

PUMPHOUSE RD

Fair

Over: BIG HOLE RIVER 009

3M W DIVIDE, Silver Bow, MT

Built 1914 Load: 6.4 t ADT: 100

PIONEER ROAD

Fair

Over: COYOTE CREEK

4 MILES SOUTHWEST OF DENT, Fergus, MT

Built 1979 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

NORTH LAKE MCDONAL

Fair

Over: MCDONALD CREEK

11.3 miles northeast of U, Flathead, MT

Built 1965 Load: 7.3 t ADT: 1,451

UPPER RD

Fair

Over: TWO LEGGIN`S CANAL 005

8M NW HARDIN, Big Horn, MT

Built 1950 Load: 7.3 t ADT: 100

COUNTY ROAD 544

Fair

Over: LOWER SEVEN MILE CR 013

13M SE BLOOMFIELD, Dawson, MT

Built 1975 Load: 7.3 t ADT: 100

DRY CR SCHOOL RD

Fair

Over: E GALLATIN RIVER 032

3M E MANHATTAN, Gallatin, MT

Built 1924 Load: 7.3 t ADT: 100

ROAD 160 NORTH

Fair

Over: MILK RIVER 037

30M NW HAVRE, Hill, MT

Built 1938 Load: 7.3 t ADT: 100

AUGUSTA-CLEMONS RD

Fair

Over: ELK CREEK 029

2M SW AUGUSTA, Lewis and Clark, MT

Built 1915 Load: 7.3 t ADT: 100

HORSE CR RD

Fair

Over: FLATHEAD CREEK 020

WILSALL-HORSE CR RD, Park, MT

Built 1912 Load: 7.3 t ADT: 100

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

MT 37 FH 57

Fair

Over: SUTTON CREEK

13M S REXFORD, Lincoln, MT

Built 1974 Load: 7.3 t ADT: 324

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

Showing 51-100 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.