State profile · Below national median SD

Wyoming bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Wyoming — drawn straight from the FHWA National Bridge Inventory.

3,181
Public bridges
26.2%
Good condition
5.4%
Poor condition
5.4%
Structurally deficient

Total Bridges

3,181

Public highway bridges in Wyoming

Good Condition

26.2%

833 bridges rated 7-9

-23.8pp vs 50% benchmark

Poor Condition

5.4%

172 bridges rated 0-4

Structurally Deficient

5.4%

172 bridges flagged for repair priority

-1.6pp vs national avg 7.0%

Wyoming vs national bridge condition

Wyoming — Good condition share 26.2%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Wyoming — Structurally deficient share 18.0%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Bridge inventory deck-condition mix — Wyoming (FHWA NBI)

Wyoming26.186733731530964%50.330084878968876%GoodFairPoorStructurally Deficient
Bridge inventory deck-condition mix — Wyoming (FHWA NBI)

Counties (23)

Albany 124 Big Horn 93 Campbell 158 Carbon 207 Converse 147 Crook 176 Fremont 177 Goshen 108 Hot Springs 40 Johnson 204 Laramie 261 Lincoln 131 Natrona 138 Niobrara 34 Park 187 Platte 163 Sheridan 171 Sublette 109 Sweetwater 196 Teton 119 Uinta 134 Washakie 61 Weston 43

Wyoming vs nearby ranks

Adjacent states on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Wyoming on the same metric.

18

Indiana

4.94% top marginal rate
Structure
Progressive
Burden @ $100K
$18,630

20

Kansas

5.25% top marginal rate
Structure
Progressive
Burden @ $100K
$23,867
Selected

56

Wyoming

5.41% top marginal rate
Structure
Progressive
Burden @ $100K
$3,181

16

Idaho

5.51% top marginal rate
Structure
Progressive
Burden @ $100K
$1,742

28

Mississippi

5.92% top marginal rate
Structure
Progressive
Burden @ $100K
$16,823

Bridges Needing Most Attention in Wyoming

Six lowest-condition bridges in Wyoming, ranked by composite NBI rating. Each is inspected at least every 24 months.

FIREHOLE LAKE DRIV

Structurally Deficient

Over: THERMAL AREA DRAINAGE

10 +/- MI. SOUTH OF MADIS, Teton, WY

Built 1935 Load: 3.6 t ADT: 1,500

Sb Cnty Rd 175

Structurally Deficient

Over: New Fork River

T30N R110W S22, Sublette, WY

Built 1940 Load: 4.3 t ADT: 11

Cb Cnty Rd 680

Poor

Over: Encampment River

4 Miles N. Of Encampment, Carbon, WY

Built 1915 Load: 4.9 t ADT: 70

BLM Road 4116

Structurally Deficient

Over: Big Sandy River

35 Miles Se Of Boulder, Sublette, WY

Built 1982 Load: 5.4 t ADT: 49

NO DATA ENTERED

Poor

Over: NO DATA ENTERED

NO DATA ENTERED, Lincoln, WY

Built 2013 Load: 5.5 t ADT: 50

Sh Cnty Rd 110

Structurally Deficient

Over: Tongue River

7 Mi Nw Of Sheridan, Sheridan, WY

Built 1903 Load: 5.5 t ADT: 179

All Bridges in Wyoming

US 89

Fair

Over: Etna Irrigation Canal

Afton-Alpine Jct, Lincoln, WY

Built 1994 Load: 32.7 t ADT: 6,794

US 189

Fair

Over: Willow Creek

Kemmerer - Labarge Road, Lincoln, WY

Built 2003 Load: 32.7 t ADT: 627

US 30

Fair

Over: Wildlife Crossing

Sage Junction - Kemmerer, Lincoln, WY

Built 2008 Load: 32.7 t ADT: 1,406

US 30

Fair

Over: Wildlife Crossing

Sage Junction - Kemmerer, Lincoln, WY

Built 2008 Load: 32.7 t ADT: 1,406

US 30

Fair

Over: Wildlife Crossing

Sage Junction - Kemmerer, Lincoln, WY

Built 2008 Load: 32.7 t ADT: 1,406

US 30

Fair

Over: Wildlife Crossing

Sage Junction - Kemmerer, Lincoln, WY

Built 2008 Load: 32.7 t ADT: 1,406

I-25 Service Road

Fair

Over: Horse Creek

Bar Nunn North, Natrona, WY

Built 1950 Load: 32.7 t ADT: 85

WYO 387

Fair

Over: Bothwell Draw

Jct I-25 - Reno Jct, Natrona, WY

Built 1952 Load: 32.7 t ADT: 427

WYO 220

Fair

Over: Horse Creek

Muddy Gap Jct-WYO 487 Jct, Natrona, WY

Built 1970 Load: 32.7 t ADT: 2,285

WYO 220

Fair

Over: Cottonwood Creek

WYO 487 Jct - Casper, Natrona, WY

Built 1965 Load: 32.7 t ADT: 3,604

WYO 220

Fair

Over: BNSF Railway

Casper, Natrona, WY

Built 1969 Load: 32.7 t ADT: 14,551

US 20

Fair

Over: South Fork Powder River

Casper - Shoshoni, Natrona, WY

Built 1973 Load: 32.7 t ADT: 2,446

Na Cnty Rd 125

Fair

Over: Middle Fork Casper Creek

19 Miles N.W. Of Casper, Natrona, WY

Built 1973 Load: 32.7 t ADT: 124

Na Cnty Rd 106

Fair

Over: South Fork Powder River

3 Miles N. Of Powder Rive, Natrona, WY

Built 1979 Load: 32.7 t ADT: 20

WYO 220

Fair

Over: Unnamed Draw

Muddy Gap-Casper, Natrona, WY

Built 1970 Load: 32.7 t ADT: 3,604

WYO 220

Fair

Over: Garden Creek

Casper, Natrona, WY

Built 2001 Load: 32.7 t ADT: 26,189

Na Cnty Rd 403

Fair

Over: Stinking Creek

23 Mi Sw Of Casper, Natrona, WY

Built 2007 Load: 32.7 t ADT: 2

Ni Cnty Rd 11

Fair

Over: Black Creek

12 Mi Sw Of Mule Crk Jct, Niobrara, WY

Built 1981 Load: 32.7 t ADT: 33

US 20

Fair

Over: C and NW Railroad

Lusk-Vantassel Road, Niobrara, WY

Built 1984 Load: 32.7 t ADT: 525

US 18

Fair

Over: Mule Creek

Lusk-Newcastle, Niobrara, WY

Built 1988 Load: 32.7 t ADT: 2,115

US 85

Fair

Over: Robbers Roost Creek

Mule Creek Jct-Newcastle, Niobrara, WY

Built 1992 Load: 32.7 t ADT: 1,079

WYO 270

Fair

Over: Provost Draw

Lance Creek East Section, Niobrara, WY

Built 2004 Load: 32.7 t ADT: 208

WYO 120

Fair

Over: Spring Creek

Thermopolis - Cody, Park, WY

Built 1970 Load: 32.7 t ADT: 2,015

WYO 120

Fair

Over: Cottonwood Creek

Thermopolis - Cody, Park, WY

Built 1962 Load: 32.7 t ADT: 1,925

WYO 120

Fair

Over: Little Dry Creek

Thermopolis - Cody, Park, WY

Built 1962 Load: 32.7 t ADT: 1,925

WYO 295

Fair

Over: Roan Wash

Jct WYO 32 - Powell, Park, WY

Built 1966 Load: 32.7 t ADT: 1,151

WYO 296

Fair

Over: Clarks Fork River

Jct US 212 - Jct WYO 120, Park, WY

Built 1972 Load: 32.7 t ADT: 832

Pa Cnty Rd 8VC

Fair

Over: Bennett Creek

1.5 Mi. S.W. Of Clark, Park, WY

Built 1967 Load: 32.7 t ADT: 206

Skyline Drive

Fair

Over: Cody Canal

Skyline Drive Cody, Park, WY

Built 1970 Load: 32.7 t ADT: 1,161

Pa Cnty Rd R12B

Fair

Over: Garland Canal

1.5 Mi. N.E. Of Ralston, Park, WY

Built 1982 Load: 32.7 t ADT: 160

Pa Cnty Rd 6WX

Fair

Over: Deer Creek

1 Mile W. Of Valley, Park, WY

Built 1973 Load: 32.7 t ADT: 177

Pa Cnty Rd R22A

Fair

Over: Alkali Creek

8 Mi. W.Nw. Of Ralston, Park, WY

Built 1974 Load: 32.7 t ADT: 617

Pa Cnty Rd R19B

Fair

Over: Alkali Creek

T55N R100W S18, Park, WY

Built 1974 Load: 32.7 t ADT: 41

Pa Cnty Rd L7B

Fair

Over: Bitter Creek

3 Miles N.E. Of Powell, Park, WY

Built 1966 Load: 32.7 t ADT: 128

Pa Cnty Rd R1A

Fair

Over: Shoshone River

4 Mi. S.E. Of Garland, Park, WY

Built 1965 Load: 32.7 t ADT: 117

Pa Cnty Rd R2N

Fair

Over: Deaver Canal

3 Miles W. Of Deaver, Park, WY

Built 1960 Load: 32.7 t ADT: 128

Pa Cnty Rd 1XG

Fair

Over: Frannie Canal

1 Mile West Of Frannie, Park, WY

Built 1960 Load: 32.7 t ADT: 33

Pa Cnty Rd 5WT

Fair

Over: Greybull River

12 Miles Sw Of Meteetse, Park, WY

Built 1969 Load: 32.7 t ADT: 74

Pa Cnty Rd 3NG

Fair

Over: Greybull River

9 Mi. Ne Of Meetetse, Park, WY

Built 1964 Load: 32.7 t ADT: 128

Pa Cnty Rd 3LE

Fair

Over: Cottonwood Creek

23 Mi. S.E. Of Cody, Park, WY

Built 1967 Load: 32.7 t ADT: 106

Pa Cnty Rd L10C

Fair

Over: Frannie Canal

2.5 Mi. N.E. Of Ralston, Park, WY

Built 1975 Load: 32.7 t ADT: 128

Pa Cnty Rd L7B

Fair

Over: Frannie Canal

3.5 Miles N.W. Of Powell, Park, WY

Built 1968 Load: 32.7 t ADT: 128

Pa Cnty Rd L6

Fair

Over: Frannie Canal

4 Miles N.W. Of Powell, Park, WY

Built 1972 Load: 32.7 t ADT: 128

Pa Cnty Rd L5

Fair

Over: Frannie Canal

5 Miles N.N.W. Of Powell, Park, WY

Built 1972 Load: 32.7 t ADT: 128

US 14

Fair

Over: Sulphur Creek

Cody-Yellowstone Road, Park, WY

Built 1955 Load: 32.7 t ADT: 18,720

Pa Cnty Rd R11H

Fair

Over: Deer Creek

3 Miles W. Of Willwood, Park, WY

Built 1970 Load: 32.7 t ADT: 128

WYO 120

Fair

Over: Heart Mountain Canal

T53W R102N S24, Park, WY

Built 1989 Load: 32.7 t ADT: 2,047

WYO 120

Fair

Over: Cottonwood Creek

Cody-Montana State Line, Park, WY

Built 1989 Load: 32.7 t ADT: 1,324

WYO 120

Fair

Over: Dry Creek

Meeteetse-Cody, Park, WY

Built 1960 Load: 32.7 t ADT: 1,925

Pa Cnty Rd 6QS

Fair

Over: Cody Canal

9 Miles S.W. Of Cody, Park, WY

Built 1995 Load: 32.7 t ADT: 90

Showing 1,451-1,500 of 3,181 bridges

Related

All states → | National rankings → | Understanding conditions → | SD bridges explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.

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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

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.