Total Bridges
5,122
Public highway bridges in Montana
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
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
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
HI
Hawaii
6.47% top marginal rate
MT
Montana
6.70% top marginal rate
NY
New York
6.90% top marginal rate
KY
Kentucky
7.06% top marginal rate
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
PoorOver: BIG HOLE RIVER 041
22M N DILLON, Beaverhead, MT
Built 1940 Load: 2.7 t ADT: 155
SLEEPY HOLLOW LN
PoorOver: PRICKLY PEAR CREEK
3 M S MONTANA CITY, Jefferson, MT
Built 2010 Load: 2.7 t ADT: 100
CARBINE RD
PoorOver: PABLO CANAL 026
4M W PABLO, Lake, MT
Built 1986 Load: 2.7 t ADT: 100
BOY SCOUT RD
PoorOver: CLEARWATER RIVER 082
2M NW SEELEY LAKE, Missoula, MT
Built 1938 Load: 2.7 t ADT: 100
ASHLEY LAKE RD
PoorOver: PABLO FEEDER CANAL 045
5M NE ST IGNATIUS, Lake, MT
Built 1965 Load: 3.0 t ADT: 100
SHEEP CR RD
PoorOver: SHEEP CREEK 097
12M S CASCADE, Cascade, MT
Built 1950 Load: 3.6 t ADT: 68
All Bridges in Montana
S 7
FairOver: DRAINAGE-STOCKPASS
18M S WIBAUX, Wibaux, MT
Built 1942 Load: 25.4 t ADT: 624
S 7
FairOver: BEAVER CREEK
SOUTH EDGE OF WIBAUX, Wibaux, MT
Built 1949 Load: 25.4 t ADT: 1,661
S SHILOH RD
FairOver: CANYON CREEK
2M SW BILLINGS, Yellowstone, MT
Built 1959 Load: 25.4 t ADT: 3,878
IRR - S 313
FairOver: ROTTEN GRASS CREEK
SAINT XAVIER, Big Horn, MT
Built 1983 Load: 25.5 t ADT: 617
NO DATA ENTERED
FairOver: JERRY CREEK
JERRY CR, Deer Lodge, MT
Built 1965 Load: 25.6 t ADT: 50
FOREST ROAD
FairOver: HALLOWAT CREEK
8 MI WEST NORTH FORK RD, Flathead, MT
Built 1956 Load: 25.6 t ADT: 10
STEEP CREEK ROAD
FairOver: BIG CREEK
BIG CR, Lincoln, MT
Built 1963 Load: 25.6 t ADT: 40
PRIMROSE LN
FairOver: JEFFERSON RIVER
SILVER STAR, Madison, MT
Built 2003 Load: 25.6 t ADT: 108
DIVIDE CREEK ROAD
FairOver: TOM MINER CREEK
TOM MINER BASIN, Park, MT
Built 1976 Load: 25.6 t ADT: 50
NO DATA ENTERED
FairOver: MIDDLE FK BULL RIVER
NO DATA ENTERED, Sanders, MT
Built 1995 Load: 25.6 t ADT: 50
1-LANE ROAD
FairOver: LAKE FORK ROCK CREEK
NO DATA ENTERED, Carbon, MT
Built 1952 Load: 25.9 t ADT: 50
MOON CREEK RD
FairOver: COTTONWOOD CREEK 044
13M SW MILES CITY, Custer, MT
Built 1928 Load: 25.9 t ADT: 82
S 332
FairOver: FOSTER CREEK
31M SW MILES CITY, Custer, MT
Built 1952 Load: 25.9 t ADT: 86
FOREST ROAD
FairOver: GRAVES CREEK
GRAVES CREEK, Flathead, MT
Built 2002 Load: 25.9 t ADT: 75
NO DATA ENTERED
FairOver: MIDDLE FORK ROCK CR
AT JUNCTION TO MOOSE LAKE, Granite, MT
Built 1956 Load: 25.9 t ADT: 50
NFDR 3350
FairOver: DRY FORK BELT CREEK
0.1 MI SOUTH 120/3350 JCT, Judith Basin, MT
Built 1967 Load: 25.9 t ADT: 40
BANNER CREEK RD
FairOver: RUBY CREEK
TEN MILE, Lewis and Clark, MT
Built 1964 Load: 25.9 t ADT: 60
RD 7609
FairOver: FISHTRAP CREEK
FISHTRAP CREEK, Sanders, MT
Built 1957 Load: 25.9 t ADT: 50
BLUE SLIDE RD
FairOver: VERMILLION RIVER
3M E TROUT CREEK, Sanders, MT
Built 1972 Load: 25.9 t ADT: 222
1-LANE ROAD
FairOver: W.FORK STILLWATER RIVER
NO DATA ENTERED, Sweet Grass, MT
Built 1964 Load: 25.9 t ADT: 50
CREVICE MNT RD
FairOver: BEAR CREEK 080
JARDINE, Park, MT
Built 2009 Load: 26.0 t ADT: 100
ROAD 944
FairOver: MOOSE CREEK
NO DATA ENTERED, Beaverhead, MT
Built 1974 Load: 26.2 t ADT: 15
S 48
FairOver: WARM SPRINGS CREEK
WARM SPRINGS, Deer Lodge, MT
Built 1931 Load: 26.2 t ADT: 1,660
BIG HORN DR
FairOver: ASHLEY CREEK 006
8M W KALISPELL, Flathead, MT
Built 2002 Load: 26.2 t ADT: 100
RD 763
FairOver: FISHER RIVER
FISHER RIVER, Lincoln, MT
Built 1977 Load: 26.2 t ADT: 40
HARVEY RD
FairOver: MUSSELSHELL RIVER 024
3M SW MELSTONE, Musselshell, MT
Built 2013 Load: 26.2 t ADT: 100
COUNTY ROAD 548
FairOver: MUSSELSHELL RIVER 025
ROUNDUP, Musselshell, MT
Built 2013 Load: 26.2 t ADT: 100
NO DATA ENTERED
FairOver: BLODGETT CR
NO DATA ENTERED, Ravalli, MT
Built 1967 Load: 26.2 t ADT: 20
COUNTY ROAD 451
FairOver: USBR MAIN CANAL 091
7M SW SAVAGE, Richland, MT
Built 2001 Load: 26.2 t ADT: 17
NO DATA ENTERED
FairOver: GREEN GULCH
NO DATA ENTERED, Sanders, MT
Built 1962 Load: 26.2 t ADT: 50
RD 217
FairOver: W FK SWAMP CR
W FK SWAMP CR, Sanders, MT
Built 1965 Load: 26.2 t ADT: 50
BIG LAKE CR RD
FairOver: BIG HOLE RIVER 091
8M N JACKSON, Beaverhead, MT
Built 1976 Load: 26.3 t ADT: 100
BURMA RD
FairOver: BIG HOLE RIVER 073
1M SE GLEN, Beaverhead, MT
Built 2000 Load: 26.3 t ADT: 100
IRR - I 90
FairOver: LITTLE BIGHORN RIVER
0.6M S CROW AGENCY, Big Horn, MT
Built 1959 Load: 26.3 t ADT: 3,503
IRR - I 90
FairOver: SEP COUNTY ROAD
6.8M N LODGE GRASS, Big Horn, MT
Built 1980 Load: 26.3 t ADT: 2,055
IRR - I 90
FairOver: SEP COUNTY ROAD
6.8M N LODGE GRASS, Big Horn, MT
Built 1980 Load: 26.3 t ADT: 2,055
IRR - S 73
FairOver: LITTLE BIGHORN RIVER
LODGE GRASS, Big Horn, MT
Built 1980 Load: 26.3 t ADT: 641
CLEAR CR RD SE
FairOver: CLEAR CREEK 095
17M S LOHMAN, Blaine, MT
Built 1985 Load: 26.3 t ADT: 37
S MAIN ST
FairOver: ROCK CREEK 046
JOLIET, Carbon, MT
Built 1987 Load: 26.3 t ADT: 891
RIVERVIEW LN
FairOver: CLARKS FK YELLOWSTNE 007
2M S BELFRY, Carbon, MT
Built 1981 Load: 26.3 t ADT: 100
MILL COULEE RD
FairOver: MILL COULEE CANAL 064
8M SE FAIRFIELD, Cascade, MT
Built 1920 Load: 26.3 t ADT: 100
COUNTY ROAD 242
FairOver: OTTER CREEK 125
BLYTHE, Cascade, MT
Built 1950 Load: 26.3 t ADT: 9
US 89
FairOver: MILL COULEE CREEK
1M NE SUN RIVER, Cascade, MT
Built 1940 Load: 26.3 t ADT: 1,428
6TH ST SW
FairOver: SUN RIVER
GREAT FALLS-6TH ST SW, Cascade, MT
Built 1980 Load: 26.3 t ADT: 14,706
FRNTAGE ROAD 81020
FairOver: MILES CREEK 037
20M NE MILES CITY, Custer, MT
Built 1929 Load: 26.3 t ADT: 504
S 59
FairOver: YELLOWSTONE RIVER
MILES CITY, Custer, MT
Built 1957 Load: 26.3 t ADT: 3,086
S 59
FairOver: NORTH FORK SUNDAY CREEK
10M NW MILES CITY, Custer, MT
Built 1963 Load: 26.3 t ADT: 496
S 16
FairOver: LOWER 7 MILE CREEK
6M SW INTAKE, Dawson, MT
Built 1967 Load: 26.3 t ADT: 2,216
I 90
FairOver: CLARK FORK RIVER
2.5M N OPPORTUNITY, Deer Lodge, MT
Built 1978 Load: 26.3 t ADT: 5,053
FRONTAGE ROAD 146
FairOver: CLARK FORK RIVER 034
4M S WARM SPRINGS, Deer Lodge, MT
Built 1931 Load: 26.3 t ADT: 100
Showing 1,751-1,800 of 5,122 bridges
Related
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.