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

IRR BIA RTE 1026

Fair

Over: UNNAMED CREEK

6.5 MI SE OF PORT GRAHAM, Kenai Peninsula, AK

Built 1996 Load: 21.8 t ADT: 10

GRANT STREET

Fair

Over: GRANT STREET VIADUCT

MILE POINT 0.1, Ketchikan Gateway, AK

Built 1970 Load: 21.8 t ADT: 1,016

UNNAMED ROAD

Fair

Over: UNNAMED CREEK

19.6 MI E OF HYDABURG HWY, Prince of Wales-Hyder, AK

Built 1992 Load: 21.8 t ADT: 10

RICHARDSON HIGHWAY

Fair

Over: TRIMS CREEK

MILE POINT 221.6, Southeast Fairbanks, AK

Built 1954 Load: 21.8 t ADT: 280

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

TONKA, Petersburg, AK

Built 2006 Load: 22.0 t ADT: 5

NO DATA ENTERED

Fair

Over: NO DATA ENTERED

SHAHEEN, Prince of Wales-Hyder, AK

Built 2004 Load: 22.0 t

HAINES HIGHWAY

Fair

Over: CHILKAT RIVER

MILE POINT 23.2, Haines, AK

Built 1958 Load: 22.4 t ADT: 340

RICHARDSON HIGHWAY

Fair

Over: MCCALLUM CREEK

MILE POINT 205.2, Southeast Fairbanks, AK

Built 1954 Load: 22.4 t ADT: 280

IRR BIA RTE 27

Fair

Over: GUNNUK CREEK TRIBUTARY

10KM FROM START OF FS6040, Prince of Wales-Hyder, AK

Built 1980 Load: 22.6 t ADT: 5

IRR BIA RTE 1082

Fair

Over: WINDY CREEK LEFT

9.5 Mi SE OF PORT GRAHAM, Kenai Peninsula, AK

Built 1997 Load: 22.7 t ADT: 10

IRR BIA RTE 461

Fair

Over: UNNAMED CREEK

17.8 MILES EAST OF HYDABU, Prince of Wales-Hyder, AK

Built 1995 Load: 22.7 t ADT: 10

LUTAK SPUR

Fair

Over: CHILKOOT RIVER

MILE POINT 4.8, Haines, AK

Built 1979 Load: 22.9 t ADT: 90

RICHARDSON HIGHWAY

Fair

Over: GUNNY SACK CREEK

MILE POINT 229.7, Southeast Fairbanks, AK

Built 1954 Load: 23.0 t ADT: 240

NO DATA ENTERED

Fair

Over: MOD

GRAVINA, Ketchikan Gateway, AK

Built 1990 Load: 23.7 t ADT: 10

LOGGING ROAD

Fair

Over: STREAM

KUPREANOF ISLAND AT KAKE, Petersburg, AK

Built 1978 Load: 23.7 t ADT: 10

LOGGING ROAD

Fair

Over: NO DATA ENTERED

KUIU ISLAND, Petersburg, AK

Built 1979 Load: 23.7 t

RICHARDSON HIGHWAY

Fair

Over: LOWER MILLER CREEK

MILE POINT 219.5, Southeast Fairbanks, AK

Built 1958 Load: 23.8 t ADT: 280

IRR:STEESE HIGHWAY

Fair

Over: BIRCH CREEK

MILE POINT 141.3, Yukon-Koyukuk, AK

Built 1957 Load: 24.1 t ADT: 110

GLENN HWY SPUR

Fair

Over: LITTLE NELCHINA RIVER

MP 137.6 AK STATE DIV PKS, Copper River, AK

Built 1952 Load: 24.4 t ADT: 765

FROSTY ROAD

Fair

Over: THIRD CREEK

FROSTY ROAD SW COLD BAY, Aleutians East, AK

Built 1991 Load: 24.5 t ADT: 1

CALHOUN AVENUE

Fair

Over: CALHOUN VIADUCT

MILE POINT 0.2, Juneau City and, AK

Built 1934 Load: 24.5 t ADT: 2,816

DENALI HIGHWAY

Fair

Over: CLEARWATER CREEK

MILE POINT 55.9, Matanuska-Susitna, AK

Built 1957 Load: 24.5 t ADT: 50

IRR:LOST RIVER RD

Fair

Over: LOST RIVER

MILE POINT 5.9, Yakutat City and, AK

Built 1985 Load: 24.5 t ADT: 100

DENALI PARK ROAD

Fair

Over: SANCTUARY RIVER

22.96 MILES WEST OF AK RO, Yukon-Koyukuk, AK

Built 1956 Load: 24.5 t ADT: 1,300

DENALI PARK ROAD

Fair

Over: IGLOO CREEK

34.26 MILES WEST OF AK RO, Yukon-Koyukuk, AK

Built 1966 Load: 24.5 t ADT: 1,300

DENALI PARK ROAD

Fair

Over: IGLOO CREEK

37.18 MILES WEST OF AK R, Yukon-Koyukuk, AK

Built 1956 Load: 24.5 t ADT: 1,300

BACK LOOP RD

Fair

Over: LAKE CREEK

MILE POINT 3.3, Juneau City and, AK

Built 1968 Load: 24.9 t ADT: 2,770

STERLING HIGHWAY

Fair

Over: COOPER CREEK

MILE POINT 13.7, Kenai Peninsula, AK

Built 1955 Load: 24.9 t ADT: 3,150

BIG LAKE ROAD

Fair

Over: FISH CREEK

MILE POINT 5.0, Matanuska-Susitna, AK

Built 1973 Load: 24.9 t ADT: 1,610

NORTH DOUGLAS HWY

Fair

Over: FISH CREEK

MILE POINT 7.3, Juneau City and, AK

Built 1950 Load: 25.1 t ADT: 740

IRR:NOME-TAYLOR RD

Fair

Over: NOME RIVER

MILE POINT13.2, Nome, AK

Built 1973 Load: 25.1 t ADT: 160

IRR BIA RTE 461

Fair

Over: UNNAMED CREEK

18.6 MILES EAST OF HYDABU, Prince of Wales-Hyder, AK

Built 1997 Load: 25.4 t ADT: 10

PARKS HIGHWAY

Fair

Over: KASHWITNA RIVER

MILE POINT 48.3, Matanuska-Susitna, AK

Built 1962 Load: 25.5 t ADT: 2,640

PARKS HIGHWAY

Fair

Over: HURRICANE GULCH

MILE POINT 139.7, Matanuska-Susitna, AK

Built 1971 Load: 25.5 t ADT: 940

DENALI HIGHWAY

Fair

Over: TANGLE RIVER

MILE POINT 21.4, Copper River, AK

Built 1954 Load: 26.1 t ADT: 140

IRR BIA RTE 27

Fair

Over: JENNY CREEK

2KM NORTH OF T IN FS6040, Prince of Wales-Hyder, AK

Built 1980 Load: 26.2 t ADT: 5

EIEL PIPELINE ROAD

Fair

Over: FRENCH CREEK

1 mile behind locked gate, Fairbanks North Star, AK

Built 1990 Load: 26.3 t ADT: 10

INTL AIRPORT RD

Fair

Over: INTL AIRPORT RD OVERHEAD

MILE POINT 1.9, Anchorage, AK

Built 1973 Load: 26.5 t ADT: 12,800

BASIN ROAD

Fair

Over: GOLD CREEK

MILE POINT 0.6, Juneau City and, AK

Built 1938 Load: 26.6 t ADT: 280

STERLING HIGHWAY

Fair

Over: KASILOF RIVER

MILE POINT 71.2, Kenai Peninsula, AK

Built 1966 Load: 26.6 t ADT: 5,770

PARKS HIGHWAY

Fair

Over: HONOLULU CREEK

MILE POINT 143.8, Matanuska-Susitna, AK

Built 1971 Load: 26.9 t ADT: 940

IRR:MARINE HWY RTE

Fair

Over: METLAKATLA FERRY TERM

METLAKATLA, Prince of Wales-Hyder, AK

Built 1973 Load: 27.1 t ADT: 100

IRR BIA RTE 1017

Fair

Over: UNNAMED CREEK

0.36 MI NORTH OF BIG SALT, Prince of Wales-Hyder, AK

Built 2020 Load: 27.2 t ADT: 30

IRR BIA ROUTE 008

Fair

Over: UNNAMED STREAM

S OF KLAWOCK LAKE, 4.2 MI, Prince of Wales-Hyder, AK

Built 1990 Load: 27.2 t ADT: 1

IRR BIA RTE 461

Fair

Over: UNNAMED CREEK

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

Built 1982 Load: 27.2 t ADT: 10

DENALI PARK ROAD

Fair

Over: TEKLANIKA RIVER

31.43 MILES WEST OF AK RO, Yukon-Koyukuk, AK

Built 1955 Load: 27.2 t ADT: 1,300

IRR BIA RTE 15

Fair

Over: UNNAMED STREAM

26.0KM SOUTHEAST OF KAKE, Prince of Wales-Hyder, AK

Built 1980 Load: 27.8 t ADT: 1

NORTH TONGASS HWY

Fair

Over: CARLANNA CREEK

MILE POINT 0.3, Ketchikan Gateway, AK

Built 1973 Load: 27.9 t ADT: 9,210

MARINE HWY ROUTE

Fair

Over: KETCHIKAN BERTH I

MILE POINT 0.2, Ketchikan Gateway, AK

Built 1988 Load: 28.1 t ADT: 164

PARKS HIGHWAY

Fair

Over: JACK RIVER

MILE POINT 174.1, Denali, AK

Built 1965 Load: 28.2 t ADT: 900

Showing 151-200 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.