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

43500

Poor

Over: LOG

TONKA, Petersburg, AK

Built 2002 Load: 24.3 t ADT: 5

43506

Poor

Over: LOG

TONKA, Petersburg, AK

Built 2002 Load: 24.3 t ADT: 5

MARINE HWY ROUTE

Poor

Over: COLD BAY DOCK

COLD BAY, Aleutians East, AK

Built 1980 Load: 24.5 t ADT: 10

RICHARDSON HIGHWAY

Poor

Over: CASTNER CREEK

MILE POINT 219.9, Southeast Fairbanks, AK

Built 1958 Load: 24.5 t ADT: 280

COPPER RIVER HWY

Poor

Over: EYAK RIVER

MILE POINT 5.7, Chugach, AK

Built 1954 Load: 24.9 t ADT: 1,110

NO DATA ENTERED

Poor

Over: NO DATA ENTERED

TONKA, Petersburg, AK

Built 2004 Load: 24.9 t ADT: 5

MARINE HWY ROUTE

Poor

Over: SKAGWAY FERRY TERMINAL

SKAGWAY, Skagway, AK

Built 1980 Load: 25.1 t ADT: 947

ALASKA HIGHWAY

Poor

Over: JOHNSON RIVER

MILE POINT 156.1, Southeast Fairbanks, AK

Built 1944 Load: 25.3 t ADT: 180

LOGGING ROAD

Poor

Over: STREAM

SALT LAKE BAY, Hoonah-Angoon, AK

Built 2003 Load: 25.9 t

IRR:JAKOLOF BAY RD

Poor

Over: BARABARA CREEK

MILE POINT 4.4, Kenai Peninsula, AK

Built 1968 Load: 25.9 t ADT: 110

ROAD

Poor

Over: NO DATA ENTERED

SALT LAKE BAY, Hoonah-Angoon, AK

Built 2002 Load: 26.2 t

SOUTH TONGASS HWY

Poor

Over: HOADLEY CREEK

MILE POINT 0.2, Ketchikan Gateway, AK

Built 1957 Load: 26.5 t ADT: 11,900

ROAD

Poor

Over: STREAM

SALT LAKE BAY, Hoonah-Angoon, AK

Built 2002 Load: 26.6 t

ALASKA HIGHWAY

Poor

Over: GERSTLE RIVER

MILE POINT 168.3, Southeast Fairbanks, AK

Built 1944 Load: 26.6 t ADT: 180

RICHARDSON HIGHWAY

Poor

Over: UPPER MILLER CREEK

MILE POINT 217.9, Southeast Fairbanks, AK

Built 1958 Load: 26.7 t ADT: 280

8330000

Poor

Over: MOD

SHELTER, Ketchikan Gateway, AK

Built 1992 Load: 26.9 t

SOUTH TONGASS HWY

Poor

Over: WATER ST VIADUCT

MILE POINT 1.7, Ketchikan Gateway, AK

Built 1955 Load: 27.1 t ADT: 14,046

43500

Poor

Over: LOG

TONKA, Petersburg, AK

Built 2002 Load: 29.5 t ADT: 5

NORTH TONGASS HWY

Poor

Over: WARD CREEK

MILE POINT 4.6, Ketchikan Gateway, AK

Built 1975 Load: 29.8 t ADT: 5,250

IRR:NOME-TELLER RD

Poor

Over: SINUK RIVER

MILE POINT 26.0, Nome, AK

Built 1967 Load: 30.3 t ADT: 20

NO DATA ENTERED

Poor

Over: STREAM

SALT LAKE BAY, Hoonah-Angoon, AK

Built 2003 Load: 32.7 t

NO DATA ENTERED

Poor

Over: PERM

UPPER CARROLL, Ketchikan Gateway, AK

Built 1997 Load: 32.7 t ADT: 2

ROAD

Poor

Over: STREAM

SALT LAKE BAY, Hoonah-Angoon, AK

Built 2002 Load: 33.7 t

IRR BIA RTE 26

Poor

Over: UNNAMED STREAM

9.1KM FROM TOTEM WAY, Prince of Wales-Hyder, AK

Built 1980 Load: 34.6 t ADT: 20

GUSTAVUS AIRPORT R

Poor

Over: SALMON RIVER

MILE POINT 1.5, Hoonah-Angoon, AK

Built 1976 Load: 36.1 t ADT: 1,020

RICHARDSON HIGHWAY

Poor

Over: GULKANA RIVER

MILE POINT 129.8, Copper River, AK

Built 1974 Load: 36.3 t ADT: 880

43506

Poor

Over: LOG

TONKA, Petersburg, AK

Built 2002 Load: 36.6 t ADT: 5

REZANOF DRIVE

Poor

Over: SARGENT CREEK

MILE POINT 13.5, Kodiak Island, AK

Built 1980 Load: 40.5 t ADT: 2,790

TAYLOR HIGHWAY

Poor

Over: AMERICAN CREEK NO 1

MILE POINT 149.8, Southeast Fairbanks, AK

Built 1988 Load: 42.9 t ADT: 20

3015100-0.60

Poor

Over: LOG

THORNE BAY, Prince of Wales-Hyder, AK

Built 1995 Load: 59.9 t

43506

Poor

Over: LOG

TONKA, Petersburg, AK

Built 2002 Load: 65.8 t ADT: 5

NO DATA ENTERED

Poor

Over: NO DATA ENTERED

THOMAS BAY, Petersburg, AK

Built 2006 Load: 70.0 t

LOGGING ROAD

Poor

Over: CORNER CREEK TRIB

CORNER BAY, Sitka City and, AK

Built 1974 Load: 94.3 t

BRIDGE ROAD

Poor

Over: VASHRII KOO RIVER

1.6 KM NE OF AIRSTRIP, Yukon-Koyukuk, AK

Built 1990 Load: 99.9 t ADT: 100

IRR BIA RTE 1045

Structurally Deficient

Over: UNNAMED STREAM

0.2KM NW OF BARGE LANDING, Bethel, AK

Built 1980

NUC CIRCLE ROAD

Structurally Deficient

Over: CREEK

On Blair Lake Range. Con, Fairbanks North Star, AK

Built 1998 ADT: 10

TANANA BRIDGE ROAD

Structurally Deficient

Over: BOUNDRY SLOUGH

1.4 KM W-SW TANANA R BR, Fairbanks North Star, AK

Built 2012 ADT: 10

IRR BIA RTE 1026

Structurally Deficient

Over: UNNAMED CREEK

0.5 MI. N OF WINDY BAY RD, Kenai Peninsula, AK

Built 1997 ADT: 10

IRR BIA RTE 1026

Structurally Deficient

Over: UNNAMED CREED

0.8 MI N OF WINDY BAY RD., Kenai Peninsula, AK

Built 1997 ADT: 10

IRR BIA RTE 8PGH

Structurally Deficient

Over: UNNAMED CREEK

14.5 Mi SE of Port Graham, Kenai Peninsula, AK

Built 1997 ADT: 5

IRR BIA RTE 8PGH

Structurally Deficient

Over: UNNAMED CREEK

15.4 Mi SE of Port Graha, Kenai Peninsula, AK

Built 1997 ADT: 5

IRR BIA RTE 002

Structurally Deficient

Over: UNNAMED STREAM

NUIQSUT, North Slope, AK

Built 1980

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

IRR BIA RTE 1048

Structurally Deficient

Over: WINDY CREEK RIGHT

16.6 Mi SE of Port Graham, Kenai Peninsula, AK

Built 1997 Load: 7.3 t ADT: 2

STERLING L/OPHIR

Structurally Deficient

Over: TAKOTNA RIVER

MILE POINT 21.8, Yukon-Koyukuk, AK

Built 1941 Load: 11.5 t ADT: 45

LOGGING ROAD

Structurally Deficient

Over: FIRST CREEK

HOMESHORE, Haines, AK

Built 1985 Load: 16.2 t

Showing 851-900 of 909 bridges

Related

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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.