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
I 90
UnknownOver: SEP S 295
3.7M E LIVINGSTON, Park, MT
Built 1962 ADT: 1,024
I 90
UnknownOver: INT MISSION CREEK
9.9M E LIVINGSTON, Park, MT
Built 1987 ADT: 100
I 90
UnknownOver: INT MISSION CREEK
9.9M E LIVINGSTON, Park, MT
Built 1987 ADT: 100
I 90
UnknownOver: SEP COUNTY ROAD
8.7M W SPRINGDALE, Park, MT
Built 1987 ADT: 100
I 90
UnknownOver: SEP COUNTY RD PEERSON RD
8.7M W SPRINGDALE, Park, MT
Built 1987 ADT: 100
I 90
UnknownOver: INT SPRINGDALE WEST
3.7M W SPRINGDALE, Park, MT
Built 1987 ADT: 70
I 90
UnknownOver: INT SPRINGDALE WEST
3.7M W SPRINGDALE, Park, MT
Built 1987 ADT: 70
FRONTAGE RD E 448
UnknownOver: COUNTY ROAD 008
10M E LIVINGSTON, Park, MT
Built 1987 ADT: 100
US 89
UnknownOver: INT EAST LIVINGSTON I 90
2M NE LIVNGSTON, Park, MT
Built 1962 ADT: 8,307
US 89
UnknownOver: INT MISSION I 90
5M NE LIVINGSTON, Park, MT
Built 1962 ADT: 5,692
WESTRIDGE RD
UnknownOver: INT BULLHEAD RD-I 15 008
9M SW SHELBY, Pondera, MT
Built 1976 ADT: 1,294
OVERPASS RD
UnknownOver: SEP I 15 009
1M N BRADY, Pondera, MT
Built 1964 ADT: 1,603
S 21
UnknownOver: INT MIDWAY I 15
3M SE CONRAD, Pondera, MT
Built 1972 ADT: 1,603
S 21
UnknownOver: INT CONRAD I 15
CONRAD, Pondera, MT
Built 1972 ADT: 1,461
S 44
UnknownOver: INT VALIER I 15
9M N CONRAD, Pondera, MT
Built 1972 ADT: 1,294
SOLLID RD
UnknownOver: SEP SOLLID ROAD-I 15
CONRAD, Pondera, MT
Built 1972 ADT: 1,461
S 365-BRADY RD
UnknownOver: INT BRADY-I 15
BRADY, Pondera, MT
Built 1964 ADT: 1,603
S 366-LEDGER RD
UnknownOver: INT LEDGER-I 15
6M N CONRAD, Pondera, MT
Built 1972 ADT: 1,490
I 90
UnknownOver: INT JENS
8M E DRUMMOND, Powell, MT
Built 1959 ADT: 100
I 90
UnknownOver: INT JENS
8M E DRUMMOND, Powell, MT
Built 1959 ADT: 100
I 90 EB
UnknownOver: INT GOLD CREEK
GOLD CREEK, Powell, MT
Built 1959 ADT: 237
I 90 WB
UnknownOver: INT GOLD CREEK
GOLD CREEK, Powell, MT
Built 1959 ADT: 237
I 90
UnknownOver: INT PHOSPHATE
3.7M W GARRISON, Powell, MT
Built 1973 ADT: 100
I 90
UnknownOver: INT PHOSPHATE
3.7M W GARRISON, Powell, MT
Built 1973 ADT: 100
I 90
UnknownOver: SEP GARRISON FRONTAGE RD
2.5M W GARRISON, Powell, MT
Built 1973 ADT: 100
I 90
UnknownOver: SEP GARRISON FRONTAGE RD
2.5M W GARRISON, Powell, MT
Built 1973 ADT: 100
I 90
UnknownOver: INT W GARRISON-RR
GARRISON, Powell, MT
Built 1979 ADT: 766
I 90
UnknownOver: INT W GARRISISON-RR
GARRISON, Powell, MT
Built 1979 ADT: 1,671
I 90
UnknownOver: INT E GARRISON-RR
1.2M S GARRISON, Powell, MT
Built 1979 ADT: 1,377
I 90
UnknownOver: INT E GARRISON-RR
1.2M S GARRISON, Powell, MT
Built 1979 ADT: 1,377
I 90
UnknownOver: JR GRADE SEP
6.2M N DEER LODGE, Powell, MT
Built 1961 ADT: 100
I 90
UnknownOver: JR GRADE SEP
6.2M N DEER LODGE, Powell, MT
Built 1961 ADT: 100
I 90
UnknownOver: INT N DEER LODGE
1.2M N DEER LODGE, Powell, MT
Built 1961 ADT: 100
I 90
UnknownOver: INT N DEER LODGE
1.2M N DEER LODGE, Powell, MT
Built 1974 ADT: 100
I 90
UnknownOver: SEP MILWAUKEE AVENUE
DEER LODGE, Powell, MT
Built 1961 ADT: 100
I 90
UnknownOver: SEP MILWAUKEE AVENUE
DEER LODGE, Powell, MT
Built 1974 ADT: 100
I 90
UnknownOver: SEP EASTSIDE ROAD
0.6M S DEER LODGE, Powell, MT
Built 1961 ADT: 35
I 90
UnknownOver: SEP EASTSIDE ROAD
0.6M S DEER LODGE, Powell, MT
Built 1974 ADT: 35
I 90
UnknownOver: SEP SAGER LANE
5M S DEER LODGE, Powell, MT
Built 1975 ADT: 100
I 90
UnknownOver: SEP SAGER LANE
5M S DEER LODGE, Powell, MT
Built 1975 ADT: 100
RACE TRACK RD
UnknownOver: INT RACETRACK-I 90 001
8M S DEER LODGE, Powell, MT
Built 1978 ADT: 5,286
BECK HILL RD
UnknownOver: INT BECKHILL I 90 008
4M SE GARRISON, Powell, MT
Built 1978 ADT: 5,165
US 12
UnknownOver: LITTLE BLACKFOOT RIV-RR
5M E GARRISON, Powell, MT
Built 2009 ADT: 100
RAMP TO MAIN ST
UnknownOver: INT S DEER LODGE-I 90
1M S DEER LODGE, Powell, MT
Built 1961 ADT: 5,286
I 94
UnknownOver: SEP MONTANA ROAD
11M SW TERRY, Prairie, MT
Built 1971 ADT: 100
I 94
UnknownOver: SEP MONTANA ROAD
11M SW TERRY, Prairie, MT
Built 1971 ADT: 100
I 94
UnknownOver: INT POWDER RIVER
7M SW TERRY, Prairie, MT
Built 1971 ADT: 100
I 94
UnknownOver: INT POWDER RIVER
7M SW TERRY, Prairie, MT
Built 1971 ADT: 100
CONNS COULEE RD
UnknownOver: SEP JENS I 94 002
2M SW TERRY, Prairie, MT
Built 1971 ADT: 2,110
FALLON TOWER RD
UnknownOver: SEP I 94 003
2M NE FALLON, Prairie, MT
Built 1977 ADT: 2,191
Showing 401-450 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.