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
SWAN RIVER RD
FairOver: SWAN RIVER 008
1M W FERNDALE, Flathead, MT
Built 1998 Load: 31.8 t ADT: 100
SPRING CREEK DR
FairOver: SPRING CREEK 095
1M NE KALISPELL, Flathead, MT
Built 1994 Load: 31.8 t ADT: 1,725
US 93
FairOver: ASHLEY CREEK
S OF KALISPELL, Flathead, MT
Built 2001 Load: 31.8 t ADT: 17,385
US 287
FairOver: GRAYLING CREEK
10M NW WEST YELLOWSTONE, Gallatin, MT
Built 1964 Load: 31.8 t ADT: 1,059
DRY CREEK RD
FairOver: E GALLATIN RIVER OVERFLO
4M N BELGRADE, Gallatin, MT
Built 1957 Load: 31.8 t ADT: 2,093
US 12
FairOver: TWIN COULEE
1M E LAVINA, Golden Valley, MT
Built 1935 Load: 31.8 t ADT: 459
COUNTY ROAD 061
FairOver: LITTLE PRICKLY PEAR 111
1M N SIEBEN INT, Lewis and Clark, MT
Built 1962 Load: 31.8 t ADT: 13
S 21
FairOver: DRY CREEK 122
12M W SIMMS, Lewis and Clark, MT
Built 1935 Load: 31.8 t ADT: 258
NO DATA ENTERED
FairOver: COAL CR
COAL CR, Madison, MT
Built 1950 Load: 31.8 t ADT: 40
S 287
FairOver: WATER GULCH
4M NW VIRGINIA CITY, Madison, MT
Built 1942 Load: 31.8 t ADT: 1,151
S 528
FairOver: SAND CREEK 022
5M SW WOLF POINT, McCone, MT
Built 1974 Load: 31.8 t ADT: 76
S 13
FairOver: S FORK BUFFALO CREEK
8M NE CIRCLE, McCone, MT
Built 1988 Load: 31.8 t ADT: 787
I 90 EB
FairOver: ST. REGIS RIVER
5.6M E DE BORGIA, Mineral, MT
Built 1980 Load: 31.8 t ADT: 3,676
MORMON PK RD
FairOver: LOLO CR
MORMON PK, Missoula, MT
Built 1958 Load: 31.8 t ADT: 50
PLACID LAKE RD S
FairOver: OWL CREEK 086
4M S SEELEY LAKE, Missoula, MT
Built 1973 Load: 31.8 t ADT: 100
GLACIER CREEK RD
FairOver: SWAN RIVER 058
W CONDON, Missoula, MT
Built 2003 Load: 31.8 t ADT: 100
US 12-E BROADWAY S
FairOver: RATTLESNAKE CREEK
MISSOULA-E BROADWAY ST, Missoula, MT
Built 1964 Load: 31.8 t ADT: 23,299
N RESERVE ST
FairOver: CLARK FORK R FLOOD PLAIN
MISSOULA-N RESERVE ST, Missoula, MT
Built 1977 Load: 31.8 t ADT: 36,321
DAISY DEAN RD
FairOver: SHIELDS RIVER 019
2M NE WILSALL, Park, MT
Built 1984 Load: 31.8 t ADT: 100
FIDDLE CREEK RD
FairOver: SHIELDS RIVER 035
6M SE CLYDE PARK, Park, MT
Built 2001 Load: 31.8 t ADT: 100
CONTENT RD
FairOver: SAGE CREEK 054
39M S MALTA, Phillips, MT
Built 1986 Load: 31.8 t ADT: 100
IRR - US 2
FairOver: DODSON SOUTH CANAL
2M W DODSON, Phillips, MT
Built 1972 Load: 31.8 t ADT: 1,190
IRR - US 2
FairOver: MILK RIVER
2M W DODSON, Phillips, MT
Built 1972 Load: 31.8 t ADT: 1,190
S 21
FairOver: IRRIGATION CANAL
1M S CONRAD, Pondera, MT
Built 1988 Load: 31.8 t ADT: 702
US 212
FairOver: LITTLE POWDER RIVER
7M SE BROADUS, Powder River, MT
Built 1976 Load: 31.8 t ADT: 2,463
N.FK BLACKFT RD
FairOver: N FK BLACKFOOT RIV
NO DATA ENTERED, Powell, MT
Built 1960 Load: 31.8 t ADT: 40
S 253
FairOver: CEDAR CREEK
9M NW TERRY, Prairie, MT
Built 1935 Load: 31.8 t ADT: 402
US 93 FH 19
FairOver: BITTERROOT RIVER
4M SE DARBY, Ravalli, MT
Built 1986 Load: 31.8 t ADT: 1,069
5TH ST SW
FairOver: USBR MAIN CANAL 082
SIDNEY-5TH ST, Richland, MT
Built 1999 Load: 31.8 t ADT: 860
IRRCOUNTY ROAD 208
FairOver: POPLAR RIVER 039
17M N POPLAR, Roosevelt, MT
Built 1964 Load: 31.8 t ADT: 100
S 59
FairOver: DRY HOUSE CREEK
25 M NW MILES CITY, Rosebud, MT
Built 2007 Load: 31.8 t ADT: 1,250
MARTEN CREEK RD
FairOver: TROUT CREEK 054
1M W TROUT CREEK, Sanders, MT
Built 2010 Load: 31.8 t ADT: 170
S 78
FairOver: SHANE CREEK
3M S COLUMBUS, Stillwater, MT
Built 2007 Load: 31.8 t ADT: 2,305
IRR - S 24
FairOver: WEST FK PORCUPINE CREEK
18M S OPHEIM, Valley, MT
Built 1940 Load: 31.8 t ADT: 290
IRR - S 24
FairOver: ALKALI CREEK
10M S OPHEIM, Valley, MT
Built 1935 Load: 31.8 t ADT: 199
SHANNON RD
FairOver: CANYON CREEK DITCH 061
3M NE LAUREL, Yellowstone, MT
Built 1984 Load: 31.8 t ADT: 1,800
DANFORD RD
FairOver: CANYON CREEK DITCH 108
5M SW BILLINGS, Yellowstone, MT
Built 1938 Load: 31.8 t ADT: 1,146
TREWIN SCHOOL RD
FairOver: BIG DITCH 066
5M W LAUREL, Yellowstone, MT
Built 1985 Load: 31.8 t ADT: 100
SHEPHERD ACTON RD
FairOver: BBWA CANAL 086
4M W SHEPHERD, Yellowstone, MT
Built 1984 Load: 31.8 t ADT: 100
S BILLINGS BLVD
FairOver: YELLOWSTONE RIVER
1M S BILLINGS, Yellowstone, MT
Built 1972 Load: 31.8 t ADT: 9,171
BUNDY RD
FairOver: YELLOWSTONE RIVER
3M NW POMPEY`S PILLAR, Yellowstone, MT
Built 2001 Load: 31.8 t ADT: 86
S 278
FairOver: DRAINAGE
JACKSON, Beaverhead, MT
Built 1970 Load: 31.9 t ADT: 389
5TH LN
FairOver: GREENFIELD S CANAL 045
5M E FAIRFIELD, Cascade, MT
Built 2003 Load: 31.9 t ADT: 100
FOREST ROAD
FairOver: GRIFFIN CREEK
MUSKRAT ROAD, Flathead, MT
Built 1970 Load: 32.1 t ADT: 30
ENYART LN
FairOver: COTTONWOOD CREEK 026
6M NE CLYDE PARK, Park, MT
Built 1970 Load: 32.1 t ADT: 100
N.FK BLACKFT RD
FairOver: LAKE CR
COPPER BLACKFOOT, Powell, MT
Built 1964 Load: 32.1 t ADT: 40
FOX FARM RD
FairOver: DRAINAGE 009
10M E GLASGOW, Valley, MT
Built 1930 Load: 32.1 t ADT: 100
IRR BIA RTE 91
FairOver: BIG HORN RIVER
2.4 KM WEST OF ST. XAVIER, Big Horn, MT
Built 1970 Load: 32.4 t ADT: 360
PEOPLE CR RD
FairOver: PEOPLE`S CREEK 106
5M SW CLEVELAND, Blaine, MT
Built 1971 Load: 32.4 t ADT: 47
MORMON AVE
FairOver: RUSSELL CREEK 035
EKALAKA-MORMON AVE, Carter, MT
Built 1940 Load: 32.4 t ADT: 477
Showing 2,351-2,400 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.