State profile · Above national median SD

Alaska bridge safety

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

909
Public bridges
42.0%
Good condition
10.1%
Poor condition
10.1%
Structurally deficient

Total Bridges

909

Public highway bridges in Alaska

Good Condition

42.0%

382 bridges rated 7-9

-8.0pp vs 50% benchmark

Poor Condition

10.1%

92 bridges rated 0-4

Structurally Deficient

10.1%

92 bridges flagged for repair priority

3.1pp vs national avg 7.0%

Alaska vs national bridge condition

Alaska — Good condition share 42.0%
National avg

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

Alaska — Structurally deficient share 33.7%
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 — Alaska (FHWA NBI)

Alaska42.02420242024203%46.864686468646866%10.121012101210122%10.121012101210122%GoodFairPoorStructurally Deficient
Bridge inventory deck-condition mix — Alaska (FHWA NBI)

Counties (30)

Aleutians East 3 Aleutians West 1 Anchorage 35 Bethel 9 Bristol Bay 1 Chugach 18 Copper River 23 Denali 11 Dillingham 0 Fairbanks North Star 42 Haines 13 Hoonah-Angoon 115 Juneau City and 17 Kenai Peninsula 45 Ketchikan Gateway 56 Kodiak Island 8 Kusilvak 0 Lake and Peninsula 1 Matanuska-Susitna 26 Nome 18 North Slope 2 Northwest Arctic 3 Petersburg 115 Prince of Wales-Hyder 185 Sitka City and 32 Skagway 3 Southeast Fairbanks 32 Wrangell City and 55 Yakutat City and 6 Yukon-Koyukuk 34

Alaska 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 Alaska on the same metric.

29

Missouri

8.53% top marginal rate
Structure
Progressive
Burden @ $100K
$24,654

26

Michigan

8.92% top marginal rate
Structure
Progressive
Burden @ $100K
$1,188
Selected

02

Alaska

10.12% top marginal rate
Structure
Progressive
Burden @ $100K
$909

42

Pennsylvania

10.50% top marginal rate
Structure
Progressive
Burden @ $100K
$14,867

38

North Dakota

10.84% top marginal rate
Structure
Progressive
Burden @ $100K
$4,242

Bridges Needing Most Attention in Alaska

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

SECTION LINE RD

Poor

Over: LITTLE CHENA RIVER

MILE POINT 10.2, Fairbanks North Star, AK

Built 1980 Load: 1.6 t ADT: 20

NO DATA ENTERED

Structurally Deficient

Over: PALMER CREEK

PALMER CREEK ROAD, Kenai Peninsula, AK

Built 1957 Load: 2.7 t ADT: 10

IRR BIA RTE 26

Structurally Deficient

Over: UNNAMED STREAM

10.7KM PAST TOTEM WAY, Prince of Wales-Hyder, AK

Built 1980 Load: 2.7 t ADT: 20

FDR 6540

Structurally Deficient

Over: STREAM - HAMILTON 60R36

ETOLIN ISLAND, Wrangell City and, AK

Built 1982 Load: 2.7 t

IRR BIA RTE 8PGH

Structurally Deficient

Over: UNNAMED CREEK

14.2 Mi SE of Port Graham, Kenai Peninsula, AK

Built 1997 Load: 3.6 t ADT: 5

IRR BIA RTE 461

Structurally Deficient

Over: UNNAMED CREEK

5.6 MILES EAST OF HYDABUR, Prince of Wales-Hyder, AK

Built 1980 Load: 3.6 t ADT: 10

All Bridges in Alaska

NABESNA ROAD

Fair

Over: JACK CREEK

MILE POINT 35.2, Copper River, AK

Built 1969 Load: 50.0 t ADT: 80

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

TONKA, Petersburg, AK

Built 2006 Load: 50.5 t ADT: 5

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

TONKA, Petersburg, AK

Built 2004 Load: 50.9 t ADT: 5

ALASKA HIGHWAY

Fair

Over: LITTLE GERSTLE RIVER

MILE POINT 164.1, Southeast Fairbanks, AK

Built 1999 Load: 51.3 t ADT: 180

43500

Fair

Over: LOG

TONKA, Petersburg, AK

Built 2002 Load: 52.2 t ADT: 5

FDR 6270

Fair

Over: STREAM

WRANGELL ISLAND, Wrangell City and, AK

Built 1982 Load: 52.5 t ADT: 10

FDR 6299

Fair

Over: STREAM - PERM

WRANGELL ISLAND, Wrangell City and, AK

Built 1982 Load: 52.5 t ADT: 10

FDR 6590

Fair

Over: STREAM - PERM

ZAREMBO ISLAND, Wrangell City and, AK

Built 1985 Load: 53.5 t ADT: 5

FDR6585

Fair

Over: STREAM - LOG

ZAREMBO ISLAND, Wrangell City and, AK

Built 1986 Load: 54.8 t

FDR 6590

Fair

Over: STREAM - PERM

ZAREMBO ISLAND, Wrangell City and, AK

Built 1983 Load: 54.8 t ADT: 5

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

TONKA, Petersburg, AK

Built 2006 Load: 55.4 t ADT: 5

EDGERTON/MCCARTHY

Fair

Over: KUSKULANA RIVER

MILE POINT 50.6, Copper River, AK

Built 1910 Load: 55.9 t ADT: 70

LOGGING ROAD

Fair

Over: STREAM

MITKOF ISLAND, Petersburg, AK

Built 1980 Load: 56.1 t ADT: 50

3000000-23.95

Fair

Over: PERM

THORNE BAY, Prince of Wales-Hyder, AK

Built 1985 Load: 56.4 t ADT: 50

IRR:MARINE HWY RTE

Fair

Over: CHENEGA RAMP

CHENEGA BAY, Chugach, AK

Built 1995 Load: 57.5 t ADT: 10

1500000-35.667

Fair

Over: PERM

EL CAP, Prince of Wales-Hyder, AK

Built 1982 Load: 58.6 t ADT: 10

ROAD

Fair

Over: STREAM

TONKA, Petersburg, AK

Built 2004 Load: 59.9 t ADT: 5

LOGGING ROAD

Fair

Over: STREAM

TONKA, Petersburg, AK

Built 1976 Load: 60.6 t ADT: 5

8400600-0.59

Fair

Over: MOD

UPPER CARROLL, Ketchikan Gateway, AK

Built 2007 Load: 60.9 t ADT: 2

LOGGING ROAD

Fair

Over: BEAVER POND OUTLET

CORNER BAY, Sitka City and, AK

Built 2004 Load: 64.5 t

SHERIDAN GLCR ROAD

Fair

Over: SHERIDAN CREEK

NO DATA ENTERED, Chugach, AK

Built 2006 Load: 65.1 t ADT: 10

HALIBUT POINT ROAD

Fair

Over: CASCADE CREEK

MILE POINT 2.0, Sitka City and, AK

Built 1937 Load: 65.3 t ADT: 4,790

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

KUPREANOF ISLAND, PORTAGE, Petersburg, AK

Built 2006 Load: 66.1 t

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

SUEMEZ, Prince of Wales-Hyder, AK

Built 2008 Load: 68.4 t

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

ZAREMBO ISLAND, Wrangell City and, AK

Built 2016 Load: 69.0 t ADT: 5

MARGARET

Fair

Over: NO DATA ENTERED

MARGARET, Ketchikan Gateway, AK

Built 2010 Load: 70.0 t

ROAD

Fair

Over: STREAM

TONKA, Petersburg, AK

Built 2004 Load: 71.6 t ADT: 5

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

THOMAS BAY, Petersburg, AK

Built 2006 Load: 74.2 t

IRR BIA ROUTE 008

Fair

Over: UNNAMED STREAM

S OF KLAWOCK LAKE, 3.9 MI, Prince of Wales-Hyder, AK

Built 1990 Load: 89.8 t ADT: 1

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

TONKA, Petersburg, AK

Built 2004 Load: 92.7 t ADT: 5

8400600-0.70

Fair

Over: MOD

UPPER CARROLL, Ketchikan Gateway, AK

Built 2007 Load: 97.2 t ADT: 2

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

KOSCIUSKO, Prince of Wales-Hyder, AK

Built 2007 Load: 97.2 t

2052000

Fair

Over: NO DATA ENTERED

STANEY, Prince of Wales-Hyder, AK

Built 2006 Load: 97.2 t ADT: 10

CHIPPEWA AVE

Fair

Over: CLEAR CREEK

0.5 KM W OF BADGER RD, Fairbanks North Star, AK

Built 2000 Load: 99.9 t ADT: 25

IRR BIA RTE 461

Fair

Over: UNNAMED CREEK

12.05 MILES EAST OF HYDAB, Prince of Wales-Hyder, AK

Built 1982 Load: 99.9 t ADT: 45

8552

Good

Over: STREAM

EXCURSION INLET, Haines, AK

Built 2017

ROAD

Good

Over: STREAM

FRESHWATER, Hoonah-Angoon, AK

Built 1997

IRR BIA RTE 6014

Good

Over: VERY SMALL SLOUGH

0.1KM WEST OF WASHETERIA, Bethel, AK

Built 2014 Load: 1.6 t ADT: 200

IRR BIA RTE 6068

Good

Over: SWAMPY SLOUGH

IN FRONT OF SCHOOL, Bethel, AK

Built 2014 Load: 1.6 t ADT: 400

IRR BIA RTE 6023

Good

Over: UNNAMED TIDAL SLOUGH

0.2KM EAST OF BARGE LNDG, Bethel, AK

Built 2005 Load: 4.5 t ADT: 200

IRR BIA RTE 6040

Good

Over: UNNAMED TIDAL SLOUGH

0.3KM WEST OF SCHOOL, Bethel, AK

Built 2005 Load: 4.5 t ADT: 200

IRR BIA RTE 6076

Good

Over: TIDAL SLOUGH

SOUTH OF TRIBAL COUNCIL, Bethel, AK

Built 2005 Load: 4.5 t ADT: 100

ROAD

Good

Over: TRIB TO NEKA RIVER

EIGHT FATHOM BIGHT, Hoonah-Angoon, AK

Built 1986 Load: 13.6 t

ROAD

Good

Over: NEKA RIVER

EIGHT FATHOM BIGHT, Hoonah-Angoon, AK

Built 1986 Load: 13.6 t

ROAD

Good

Over: NEKA RIVER

EIGHT FATHOM BIGHT, Hoonah-Angoon, AK

Built 1986 Load: 13.6 t

LOGGING ROAD

Good

Over: STREAM

GAME CREEK, Hoonah-Angoon, AK

Built 1985 Load: 13.9 t ADT: 50

LOGGING ROAD

Good

Over: CREEK

FRESHWATER, Hoonah-Angoon, AK

Built 1985 Load: 13.9 t ADT: 10

MANCHU TRAIL

Good

Over: FRENCH CREEK

APPROXIMATELY 350' FROM I, Fairbanks North Star, AK

Built 1960 Load: 15.4 t ADT: 1

LOGGING ROAD

Good

Over: HOMESHORE CREEK

HOMESHORE, Haines, AK

Built 1985 Load: 16.2 t

LOGGING ROAD

Good

Over: LOWER SWANSON CREEK

HOMESHORE, Haines, AK

Built 1988 Load: 16.2 t

Showing 401-450 of 909 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.