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

COUNTY ROAD 307

Fair

Over: BENNIE PEER CREEK 021

7M E SIDNEY, Richland, MT

Built 1997 Load: 34.5 t ADT: 100

SKYLARK RD

Fair

Over: CHERRY CREEK 093

3M N GLASGOW, Valley, MT

Built 2012 Load: 34.5 t ADT: 100

MAILBOX RD

Fair

Over: BBWA CANAL 087

7M NW SHEPHERD, Yellowstone, MT

Built 1967 Load: 34.5 t ADT: 100

CUSTER FRTG RD

Fair

Over: AUTOMATIC CREEK 036

10M SW CUSTER, Yellowstone, MT

Built 1951 Load: 34.5 t ADT: 118

IRR - US 2

Fair

Over: STILLWATER RIVER

1M NE KALISPELL, Flathead, MT

Built 1966 Load: 34.5 t ADT: 13,399

IRR - US 2

Fair

Over: RR

14M NW ESSEX, Flathead, MT

Built 1956 Load: 34.5 t ADT: 2,119

IRR - US 2

Fair

Over: MIDVALE CREEK

EAST GLACIER, Glacier, MT

Built 2001 Load: 34.5 t ADT: 1,836

US 2

Fair

Over: DODSON SOUTH CANAL

12M W SACO, Phillips, MT

Built 1966 Load: 34.5 t ADT: 1,294

US 2

Fair

Over: BEAR CREEK

9M E HINSDALE, Valley, MT

Built 1996 Load: 34.5 t ADT: 1,148

US 2

Fair

Over: CLOVER CREEK

5M E CULBERTSON, Roosevelt, MT

Built 1967 Load: 34.5 t ADT: 1,242

US 93

Fair

Over: SKALKAHO CREEK

2M S HAMILTON, Ravalli, MT

Built 1984 Load: 34.5 t ADT: 10,223

BUSINESS RTE 90

Fair

Over: YELLOWSTONE RIVER

NE LIVINGSTON, Park, MT

Built 2013 Load: 34.5 t ADT: 5,035

US 12

Fair

Over: FLAGSTAFF CREEK

2M E CHECKERBOARD, Meagher, MT

Built 2012 Load: 34.5 t ADT: 341

US 12

Fair

Over: HAYMAKER CREEK

N TWO DOT, Wheatland, MT

Built 1966 Load: 34.5 t ADT: 554

S 16-S CENTRAL AVE

Fair

Over: LONE TREE CREEK

SIDNEY-S CENTRAL AVE, Richland, MT

Built 1974 Load: 34.5 t ADT: 8,550

IRR - S 13

Fair

Over: TULE CREEK

11M NE WOLF POINT, Roosevelt, MT

Built 1991 Load: 34.5 t ADT: 366

US 191

Fair

Over: WARM SPRINGS CREEK

5M SW HILGER, Fergus, MT

Built 2011 Load: 34.5 t ADT: 841

US 191

Fair

Over: BIG TIMBER CREEK

2M N BIG TIMBER, Sweet Grass, MT

Built 1997 Load: 34.5 t ADT: 1,333

US 191 FH 45

Fair

Over: COUGAR CREEK

7M N WEST YELLOWSTONE, Gallatin, MT

Built 1964 Load: 34.5 t ADT: 3,257

US 191 FH 42

Fair

Over: SWAN CREEK

12M NE BIG SKY, Gallatin, MT

Built 2009 Load: 34.5 t ADT: 8,666

S 78

Fair

Over: WHITEBIRD CREEK

6M NE ABSAROKEE, Stillwater, MT

Built 2007 Load: 34.5 t ADT: 2,305

PENDROY RD

Fair

Over: FARMER`S COULEE

1M E PENDROY, Teton, MT

Built 1949 Load: 34.5 t ADT: 168

E VALLEY CENTER RD

Fair

Over: HYALITE CREEK

3M NW BOZEMAN, Gallatin, MT

Built 2011 Load: 34.5 t ADT: 6,077

WINIFRED HWY

Fair

Over: DOG CREEK

CHRISTINA, Fergus, MT

Built 1954 Load: 34.5 t ADT: 382

2ND AVE S-TAMPICO

Fair

Over: CHERRY CREEK

W EDGE OF GLASGOW, Valley, MT

Built 1989 Load: 34.5 t ADT: 478

S 248

Fair

Over: W FK POPLAR RV OVERFLOW

1M E RICHLAND, Daniels, MT

Built 1948 Load: 34.5 t ADT: 193

S 248

Fair

Over: MARTIN COULEE

1M E RICHLAND, Daniels, MT

Built 1948 Load: 34.5 t ADT: 193

RAMP TO MAIN ST

Fair

Over: INT S DEER LODGE-I 90

1M S DEER LODGE, Powell, MT

Built 1961 Load: 34.5 t ADT: 100

DRY CREEK RD

Fair

Over: REESE CREEK

4M N BELGRADE, Gallatin, MT

Built 1957 Load: 34.5 t ADT: 2,093

S 359

Fair

Over: SOUTH BOULDER RIVER

3M S JEFFERSON ISLAND, Madison, MT

Built 1958 Load: 34.5 t ADT: 1,402

S WAGNER ROAD

Fair

Over: MILK RIVER

1M S WAGNER, Phillips, MT

Built 2000 Load: 34.5 t ADT: 79

BELL CROSSING

Fair

Over: BITTERROOT RIVER OVERFLO

3M S STEVENSVILLE, Ravalli, MT

Built 1974 Load: 34.5 t ADT: 2,762

S 374-OUTLOOK HWY

Fair

Over: DRAINAGE

2M S OUTLOOK, Sheridan, MT

Built 1955 Load: 34.5 t ADT: 151

NYE RD-S 419

Fair

Over: WEST ROSEBUD CREEK

FISHTAIL, Stillwater, MT

Built 1991 Load: 34.5 t ADT: 1,055

S 566-TONGUE R RD

Fair

Over: TONGUE RIVER

31M SW ASHLAND, Rosebud, MT

Built 1980 Load: 34.5 t ADT: 44

CENTRAL AVE W

Fair

Over: GALT AVE-RR

GREAT FALLS-CENTRAL AVE W, Cascade, MT

Built 1967 Load: 34.5 t ADT: 7,062

CENTRAL AVE W

Fair

Over: GALT AVE-RR

GREAT FALLS-CENTRAL AVE W, Cascade, MT

Built 1967 Load: 34.5 t ADT: 7,062

AIRPORT RD

Fair

Over: LONE TREE CREEK

SIDNEY-AIRPORT RD, Richland, MT

Built 1999 Load: 34.5 t ADT: 1,031

I 15

Fair

Over: INT S MONTANA STREET

BUTTE, Silver Bow, MT

Built 1961 Load: 34.7 t ADT: 9,590

IRR - I 90

Fair

Over: LITTLE BIGHORN RIVER

0.6M S CROW AGENCY, Big Horn, MT

Built 1949 Load: 34.7 t ADT: 3,503

S 9TH ST-ISLAND DR

Fair

Over: YELLOWSTONE RIVER 070

LIVINGSTON-S 9TH ST, Park, MT

Built 2011 Load: 34.7 t ADT: 100

TAMPICO RD N

Fair

Over: MILK RIVER 094

N TAMPICO, Valley, MT

Built 2002 Load: 34.7 t ADT: 100

ROAD 169

Fair

Over: RACETRACK CR

1 MILE BEFORE CAMPGROUND, Deer Lodge, MT

Built 1981 Load: 35.0 t ADT: 50

NO DATA ENTERED

Fair

Over: MIDDLE FORK ROCK CR

BEFORE KAISER LAKE, Granite, MT

Built 1965 Load: 35.0 t ADT: 40

NO DATA ENTERED

Fair

Over: BEEFSTRAIGHT CR

NO DATA ENTERED, Silver Bow, MT

Built 1963 Load: 35.0 t ADT: 50

W.FK.MILL CREEK RD

Fair

Over: WEST FORK MILL CREEK

S. OF LIVINGSTON, Park, MT

Built 1971 Load: 35.0 t ADT: 50

6761

Fair

Over: FISHER RIVER

HOUGHTON CREEK, Lincoln, MT

Built 1986 Load: 35.0 t ADT: 20

NO DATA ENTERED

Fair

Over: EAST FK BULL RIVER

NO DATA ENTERED, Sanders, MT

Built 1963 Load: 35.0 t ADT: 30

NO DATA ENTERED

Fair

Over: NEZPERCE FK

NO DATA ENTERED, Ravalli, MT

Built 1972 Load: 35.3 t ADT: 10

NO DATA ENTERED

Fair

Over: WEST FORK ROCK CR

WEST FORK ROCK CR, Granite, MT

Built 1969 Load: 35.3 t ADT: 40

Showing 2,551-2,600 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.