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
443 RAMP-I 90
FairOver: SHILOH INTERCHANGE
BILLINGS, Yellowstone, MT
Built 2001 Load: 24.5 t ADT: 5,463
HESPER RD
FairOver: CANYON CREEK 114
7M NE LAUREL, Yellowstone, MT
Built 1972 Load: 24.5 t ADT: 519
21 MILE RD
FairOver: N FK CROOKED CREEK 079
20M N BILLINGS, Yellowstone, MT
Built 1965 Load: 24.5 t ADT: 68
CUSTER FRTG RD
FairOver: ROUGH COULEE 033
6M NE POMPEY`S PILLAR, Yellowstone, MT
Built 1940 Load: 24.5 t ADT: 146
CUSTER FRTG RD
FairOver: SPRING CREEK 035
8M NE POMPEY`S PILLAR, Yellowstone, MT
Built 1940 Load: 24.5 t ADT: 146
RAZOR CREEK RD
FairOver: RAZOR CREEK 164
3M N SHEPHERD, Yellowstone, MT
Built 1977 Load: 24.5 t ADT: 100
BUFFALO CREEK RD
FairOver: BUFFALO CREEK 132
5M NW CUSTER, Yellowstone, MT
Built 2012 Load: 24.5 t ADT: 100
KING AVE W
FairOver: CANYON CREEK
5M W BILLINGS, Yellowstone, MT
Built 1966 Load: 24.5 t ADT: 780
WEASEL CK ROAD
FairOver: CROW CREEK
JENKINS GULCH, Broadwater, MT
Built 1983 Load: 24.6 t ADT: 20
NO DATA ENTERED
FairOver: COPPER CR
AFTER COPPER CREEK CG, Granite, MT
Built 1956 Load: 24.6 t ADT: 50
FDR 119
FairOver: SHEEP CREEK
3.8 MI WEST US89/119 JCT, Meagher, MT
Built 1956 Load: 24.6 t ADT: 50
NFSR
FairOver: CONDON CREEK
CONCON, Missoula, MT
Built 2010 Load: 24.6 t ADT: 50
SAWPIT
FairOver: NINEMILE CR
SAWPIT, Missoula, MT
Built 1970 Load: 24.6 t ADT: 50
STAHL CREEK ROAD
FairOver: STAHL CR
STAHL CR, Lincoln, MT
Built 1966 Load: 24.9 t ADT: 50
S.FK.STAHL CR RD
FairOver: STAHL CR
STAHL CR, Lincoln, MT
Built 1966 Load: 24.9 t ADT: 50
5900 JUNGLE CR.RD.
FairOver: WEST FORK YAAK RIVER
JUST PAST JCT WITH 338, Lincoln, MT
Built 1980 Load: 24.9 t ADT: 10
RD 450
FairOver: WINDFALL CR
VERDE WINDFALL, Mineral, MT
Built 1967 Load: 24.9 t ADT: 50
NO DATA ENTERED
FairOver: BLIND CANYON
NO DATA ENTERED, Missoula, MT
Built 1991 Load: 24.9 t ADT: 50
MILLEGAN RD
FairOver: MISSOURI RIVER
ULM, Cascade, MT
Built 1983 Load: 25.0 t ADT: 549
Lower Ray Cr Road
FairOver: Eastside Canal
5 mi NE of Townsend MT, Broadwater, MT
Built 1974 Load: 25.2 t ADT: 5
NO DATA ENTERED
FairOver: BIG LAKE
BIG LAKE CR, Beaverhead, MT
Built 1971 Load: 25.3 t ADT: 40
SARPY BASIN RD
FairOver: SARPY CREEK 033
24M E HARDIN, Big Horn, MT
Built 1981 Load: 25.3 t ADT: 100
NO DATA ENTERED
FairOver: MILLER CR
NO DATA ENTERED, Sanders, MT
Built 1956 Load: 25.3 t ADT: 20
NO DATA ENTERED
FairOver: N FK E FK BULL RIVER
NO DATA ENTERED, Sanders, MT
Built 1960 Load: 25.3 t ADT: 50
VALLEY CREEK RD
FairOver: VALLEY CREEK 008
2M NW PARK CITY, Stillwater, MT
Built 2010 Load: 25.3 t ADT: 100
I 15
FairOver: BEAVERHEAD RIVER
8M N CLARK CANYON DAM, Beaverhead, MT
Built 1981 Load: 25.4 t ADT: 2,210
STODDARD DR
FairOver: EAST BENCH CANAL 002
8M NE DILLON, Beaverhead, MT
Built 1962 Load: 25.4 t ADT: 100
MT HWY 91
FairOver: POINDEXTER SLOUGH
3M SW DILLON, Beaverhead, MT
Built 1936 Load: 25.4 t ADT: 582
I 90
FairOver: RR
14.9M W HARDIN, Big Horn, MT
Built 1972 Load: 25.4 t ADT: 3,688
I 90
FairOver: RR
14.9M W HARDIN, Big Horn, MT
Built 1972 Load: 25.4 t ADT: 3,688
IRR - I 90
FairOver: LITTLE BIGHORN RIVER
2.5M S CROW AGENCY, Big Horn, MT
Built 1976 Load: 25.4 t ADT: 2,439
IRR - I 90
FairOver: SEP LOCAL ROAD
3.7M S LODGE GRASS, Big Horn, MT
Built 1985 Load: 25.4 t ADT: 1,978
IRR - I 90
FairOver: SEP LOCAL ROAD
3.7M S LODGE GRASS, Big Horn, MT
Built 1985 Load: 25.4 t ADT: 1,978
WARMAN LOOP
FairOver: BIGHORN CANAL 018
3M NE FORT SMITH, Big Horn, MT
Built 1930 Load: 25.4 t ADT: 100
NEW HOPE RD
FairOver: SNAKE CREEK 042
9M W HARLEM, Blaine, MT
Built 1933 Load: 25.4 t ADT: 100
US 2
FairOver: DRAINAGE
CHINOOK, Blaine, MT
Built 1942 Load: 25.4 t ADT: 2,818
TURNER RD
FairOver: S FORK WAYNE CREEK
7M NE HARLEM, Blaine, MT
Built 1947 Load: 25.4 t ADT: 61
TURNER RD
FairOver: W SAVOY CREEK
13M NE HARLEM, Blaine, MT
Built 1947 Load: 25.4 t ADT: 61
S 72
FairOver: CLARKS FORK YELLOWSTONE
4M NE BELFRY, Carbon, MT
Built 2011 Load: 25.4 t ADT: 1,722
LITTLE MISSOURI RD
FairOver: LITTLE MISSOURI RIV 009
15M SW CAPITOL, Carter, MT
Built 1989 Load: 25.4 t ADT: 42
US 89
FairOver: MILL COULEE CANAL
5M N FORT SHAW, Cascade, MT
Built 1940 Load: 25.4 t ADT: 1,747
S 80
FairOver: FLAT CREEK
3M SE GERALDINE, Chouteau, MT
Built 1949 Load: 25.4 t ADT: 234
S 80
FairOver: BUTTE CREEK
6M SE SQUARE BUTTE, Chouteau, MT
Built 1950 Load: 25.4 t ADT: 157
PLEASANT VIEW RD
FairOver: CLEAR CREEK 026
17M W GLENDIVE, Dawson, MT
Built 1976 Load: 25.4 t ADT: 50
S 200S-TOWNE ST
FairOver: YELLOWSTONE RIVER
GLENDIVE-TOWNE ST, Dawson, MT
Built 1958 Load: 25.4 t ADT: 8,640
US 94
FairOver: UPPER SEVEN MILE CREEK
1M SW GLENDIVE, Dawson, MT
Built 1959 Load: 25.4 t ADT: 2,450
US 94
FairOver: UPPER SEVEN MILE CREEK
1M SW GLENDIVE, Dawson, MT
Built 1959 Load: 25.4 t ADT: 1,225
MARSH RD
FairOver: DRAINAGE
1M S GLENDIVE, Dawson, MT
Built 1964 Load: 25.4 t ADT: 434
FRONTAGE ROAD 146
FairOver: WILLOW CREEK 033
4M S WARM SPRINGS, Deer Lodge, MT
Built 1931 Load: 25.4 t ADT: 100
S 1
FairOver: WARM SPRINGS CREEK
1M W ANACONDA, Deer Lodge, MT
Built 1990 Load: 25.4 t ADT: 4,724
Showing 1,651-1,700 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.