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

I-25 NBL

Unknown

Over: Ormsby Road

Casper - Kaycee, Natrona, WY

Built 1971 ADT: 83

I-25 SBL

Unknown

Over: Ormsby Road

Casper - Kaycee, Natrona, WY

Built 1971 ADT: 83

Hereford Lane

Unknown

Over: I-25

Casper Marginal, Natrona, WY

Built 1960 ADT: 11,987

US 20/26 Conn. EBL

Unknown

Over: Na County Road 129

Casper, Natrona, WY

Built 1960 ADT: 105

US 20/26 Conn. WBL

Unknown

Over: Na County Road 129

Casper, Natrona, WY

Built 1960 ADT: 105

WYO 253

Unknown

Over: I-25

Casper Marginal, Natrona, WY

Built 1968 ADT: 4,702

US 20/26/87

Unknown

Over: I-25

Casper Marginal, Natrona, WY

Built 1968 ADT: 12,268

BNSF Railway

Unknown

Over: North Center Street

Center Street Casper, Natrona, WY

Built 1941 ADT: 7,099

Shepperson Road

Unknown

Over: I-25

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 1,464

I-25 SBL

Unknown

Over: Na CR 115 (Smokey Gap)

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 8

I-25 NBL

Unknown

Over: WYO 387

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 427

I-25 NBL

Unknown

Over: I-25 Service Road

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 5

I-25 SBL

Unknown

Over: I-25 Service Road

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 5

I-25 SBL

Unknown

Over: North McKinley Street

Casper Marginal, Natrona, WY

Built 1958 ADT: 1,829

I-25 SBL

Unknown

Over: North Center Street

Casper Marginal, Natrona, WY

Built 1958 ADT: 7,099

Unnamed Road

Unknown

Over: I-25

Casper - Kaycee, Natrona, WY

Built 1981 ADT: 1,515

I-25 NBL

Unknown

Over: WYO 259

Casper - Kaycee, Natrona, WY

Built 1976 ADT: 3,812

I-25 SBL

Unknown

Over: WYO 259

Casper - Kaycee, Natrona, WY

Built 1976 ADT: 1,106

BNSF Railway

Unknown

Over: North McKinley Street

McKinley Street Casper, Natrona, WY

Built 1945 ADT: 4,863

I-25 NBL

Unknown

Over: US 20 / 26 Connector

Casper Marginal, Natrona, WY

Built 1984 ADT: 1,672

I-25 SBL

Unknown

Over: US 20 / 26 Connector

Casper Marginal, Natrona, WY

Built 1984 ADT: 4,485

I-25 NBL

Unknown

Over: WYO 220

Casper Marginal, Natrona, WY

Built 1985 ADT: 14,551

I-25 SBL

Unknown

Over: WYO 220

Casper Marginal, Natrona, WY

Built 1985 ADT: 14,551

Ranch Road

Unknown

Over: I-25

Casper - Kaycee, Natrona, WY

Built 2002 ADT: 1,464

I-25 NBL

Unknown

Over: WYO 258 (Wyoming Blvd)

Casper Marginal, Natrona, WY

Built 2006 ADT: 12,576

I-25 SBL

Unknown

Over: WYO 258 (Wyoming Blvd)

Casper Marginal, Natrona, WY

Built 2007 ADT: 12,576

WYO 254

Unknown

Over: US 20 / 26 Connector

Casper, Natrona, WY

Built 2015 ADT: 5,629

I-25 NBL and SBL

Unknown

Over: Walsh Drive

Casper Marginal, Natrona, WY

Built 2022 ADT: 5,717

I-25 NBL

Unknown

Over: South Chugwater Hwy

Cheyenne - Chugwater, Platte, WY

Built 1969 ADT: 86

I-25 SBL

Unknown

Over: South Chugwater Hwy

Cheyenne - Chugwater, Platte, WY

Built 1969 ADT: 86

I-25 NBL

Unknown

Over: WYO 321

Chugwater Marginal, Platte, WY

Built 1968 ADT: 945

I-25 SBL

Unknown

Over: WYO 211

Chugwater Marginal, Platte, WY

Built 1968 ADT: 1,798

I-25 NBL

Unknown

Over: WYO 321

Chugwater - Wheatland, Platte, WY

Built 1969 ADT: 289

I-25 SBL

Unknown

Over: Pl CR 98 (TY Road)

Chugwater - Wheatland, Platte, WY

Built 1969 ADT: 131

E Hunton Creek Rd

Unknown

Over: I-25

Chugwater - Wheatland, Platte, WY

Built 1958 ADT: 3,173

I-25 NBL

Unknown

Over: N Antelope Creek Rd

Chugwater - Wheatland, Platte, WY

Built 1958 ADT: 131

I-25 SBL

Unknown

Over: N Antelope Creek Rd

Chugwater - Wheatland, Platte, WY

Built 1958 ADT: 131

I-25 NBL

Unknown

Over: Bordeaux Road

Chugwater - Wheatland, Platte, WY

Built 1970 ADT: 25

I-25 SBL

Unknown

Over: Bordeaux Road

Chugwater - Wheatland, Platte, WY

Built 1970 ADT: 206

I-25 NBL

Unknown

Over: I-25 East Service Road

Chugwater - Wheatland, Platte, WY

Built 1970 ADT: 328

I-25 SBL

Unknown

Over: WYO 34

Chugwater - Wheatland, Platte, WY

Built 1970 ADT: 914

Pl Cnty Rd 90

Unknown

Over: I-25

Wheatland - Glendo, Platte, WY

Built 1966 ADT: 3,390

I-25 NBL

Unknown

Over: Laramie River Road

Wheatland - Glendo, Platte, WY

Built 1966 ADT: 10

I-25 SBL

Unknown

Over: Laramie River Road

Wheatland - Glendo, Platte, WY

Built 1966 ADT: 131

I-25 NBL

Unknown

Over: East Johnson Road

Wheatland - Glendo, Platte, WY

Built 1966 ADT: 131

I-25 SBL

Unknown

Over: East Johnson Road

Wheatland - Glendo, Platte, WY

Built 1966 ADT: 131

I-25 NBL

Unknown

Over: US 26

Wheatland - Glendo, Platte, WY

Built 1966 ADT: 571

I-25 SBL Off Ramp

Unknown

Over: US 26

Dwyer Jct, Platte, WY

Built 1966 ADT: 511

I-25 NBL

Unknown

Over: Pl CR 117 (Pepper Road)

Wheatland - Glendo, Platte, WY

Built 1966 ADT: 75

I-25 SBL

Unknown

Over: Pl CR 114 (Fish Creek)

Wheatland - Glendo, Platte, WY

Built 1966 ADT: 57

Showing 351-400 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.