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

NORTH TONGASS HWY

Good

Over: FIRST WATERFALL CREEK

MILE POINT 13.9, Ketchikan Gateway, AK

Built 2019 Load: 55.1 t ADT: 330

NORTH TONGASS HWY

Good

Over: SECOND WATERFALL CREEK

MILE POINT 14.5, Ketchikan Gateway, AK

Built 2019 Load: 55.1 t ADT: 330

NO DATA ENTERED

Good

Over: NO DATA ENTERED

THORNE BAY, Prince of Wales-Hyder, AK

Built 2010 Load: 55.1 t ADT: 10

2050400-0.56

Good

Over: NO DATA ENTERED

STANEY, Prince of Wales-Hyder, AK

Built 2013 Load: 55.1 t ADT: 10

NO DATA ENTERED

Good

Over: NO DATA ENTERED

THORNE BAY, Prince of Wales-Hyder, AK

Built 2017 Load: 55.1 t ADT: 5

NO DATA ENTERED

Good

Over: NO DATA ENTERED

COFFMAN, Prince of Wales-Hyder, AK

Built 2016 Load: 55.1 t ADT: 50

PARKS HIGHWAY

Good

Over: LITTLE GOLDSTREAM CK

MILE POINT 279.1, Yukon-Koyukuk, AK

Built 2021 Load: 55.2 t ADT: 1,570

2000000-11.609

Good

Over: PERM

NAUKATI, Prince of Wales-Hyder, AK

Built 1986 Load: 55.4 t ADT: 50

3000000-84.181

Good

Over: STREAM

WHALE PASS, Prince of Wales-Hyder, AK

Built 2010 Load: 55.7 t ADT: 10

FDR 3270

Good

Over: STREAM - PERM

WRANGELL ISLAND, Wrangell City and, AK

Built 1982 Load: 55.7 t ADT: 10

SEWARD HIGHWAY

Good

Over: PTARMIGAN CREEK

MILE POINT 22.9, Kenai Peninsula, AK

Built 2012 Load: 55.8 t ADT: 1,700

SEWARD HIGHWAY

Good

Over: FALLS CREEK

MILE POINT 24.8, Kenai Peninsula, AK

Built 2012 Load: 55.8 t ADT: 1,700

DENALI HIGHWAY

Good

Over: ROCK CREEK

MILE POINT 24.8, Chugach, AK

Built 2021 Load: 55.9 t ADT: 40

RIVER ROAD

Good

Over: CHENA RIVER

B/T KENNEY RD & NAUTILUS, Fairbanks North Star, AK

Built 2020 Load: 56.1 t ADT: 50

FDR 6265

Good

Over: STREAM

WRANGELL ISLAND, Wrangell City and, AK

Built 1982 Load: 56.4 t ADT: 50

SHOTGUN COVE ROAD

Good

Over: SECOND SALMON RUN E FORK

MILE POINT 7.1, Chugach, AK

Built 2016 Load: 58.2 t ADT: 50

CHENA HOT SPR RD

Good

Over: JENNY M CREEK

MILE POINT 20.0, Fairbanks North Star, AK

Built 2019 Load: 58.7 t ADT: 1,850

SEWARD HIGHWAY

Good

Over: VIRGIN CREEK

MILE POINT 88.5, Anchorage, AK

Built 2019 Load: 58.8 t ADT: 4,276

3000000-60.02

Good

Over: PERM

COFFMAN, Prince of Wales-Hyder, AK

Built 1983 Load: 59.0 t ADT: 50

PARKS HIGHWAY

Good

Over: MIDDLE FORK CHULITNA RIV

MILE POINT 160.3, Matanuska-Susitna, AK

Built 2016 Load: 59.1 t ADT: 900

3000000-28.30

Good

Over: PERM

THORNE BAY, Prince of Wales-Hyder, AK

Built 1991 Load: 59.6 t ADT: 50

MISSION AVENUE

Good

Over: NINILCHIK RIVER

MILE POINT 0.2, Kenai Peninsula, AK

Built 2014 Load: 59.7 t ADT: 180

NO DATA ENTERED

Good

Over: SLIDE

SITKA, Sitka City and, AK

Built 2002 Load: 59.9 t ADT: 30

TERN LAKE ROAD

Good

Over: DAVE'S CREEK

NO DATA ENTERED, Kenai Peninsula, AK

Built 2009 Load: 60.9 t ADT: 10

NO DATA ENTERED

Good

Over: NO DATA ENTERED

MITKOF ISLAND, Petersburg, AK

Built 2005 Load: 60.9 t ADT: 50

ROAD

Good

Over: NO DATA ENTERED

SITKA, Sitka City and, AK

Built 2002 Load: 61.2 t ADT: 99

FDR 6542

Good

Over: STREAM - GLUELAM SLAB

ETOLIN ISLAND, Wrangell City and, AK

Built 2000 Load: 61.2 t

NO DATA ENTERED

Good

Over: NO DATA ENTERED

THOMAS BAY, Petersburg, AK

Built 2006 Load: 64.5 t

LOGGING ROAD

Good

Over: BEAVER POND

CORNER BAY, Sitka City and, AK

Built 2004 Load: 64.5 t

LOGGING ROAD

Good

Over: STREAM

CORNER BAY, Sitka City and, AK

Built 2004 Load: 64.5 t

LOGGING ROAD

Good

Over: STREAM

CORNER BAY, Sitka City and, AK

Built 2004 Load: 64.5 t

ELLIOTT HIGHWAY

Good

Over: HUTLINANA CREEK

MILE POINT 122.0, Yukon-Koyukuk, AK

Built 2004 Load: 65.2 t ADT: 56

NO DATA ENTERED

Good

Over: NO DATA ENTERED

HOONAH - LONG ISLAND, Hoonah-Angoon, AK

Built 2005 Load: 65.8 t ADT: 50

2100000-4.6

Good

Over: NO DATA ENTERED

12 MILE, Prince of Wales-Hyder, AK

Built 2005 Load: 65.8 t ADT: 10

2100000-0.21

Good

Over: TRIBUTARY TO 12-MILE CK

12 MILE, Prince of Wales-Hyder, AK

Built 2015 Load: 66.4 t ADT: 10

3000020-0.51

Good

Over: PERM

CONTROL LAKE, Prince of Wales-Hyder, AK

Built 1984 Load: 68.7 t ADT: 50

2100000-6.5

Good

Over: TRIBUTARY TO 12-MILE CK

12 MILE, Prince of Wales-Hyder, AK

Built 2015 Load: 69.0 t ADT: 10

3000000-24.82

Good

Over: NO DATA ENTERED

THORNE BAY, Prince of Wales-Hyder, AK

Built 2008 Load: 69.7 t ADT: 50

NORTH THORNE

Good

Over: MOD

THORNE BAY, Prince of Wales-Hyder, AK

Built 2010 Load: 69.7 t ADT: 5

8060000-3.286

Good

Over: NO DATA ENTERED

FIRE COVE, Ketchikan Gateway, AK

Built 2005 Load: 70.0 t

8430000

Good

Over: ELDERBERRY CREEK

SHOAL COVE, Ketchikan Gateway, AK

Built 2011 Load: 70.0 t ADT: 5

8430000

Good

Over: MONTY PYTHON CREEK

SHOAL COVE, Ketchikan Gateway, AK

Built 2011 Load: 70.0 t ADT: 5

8440000

Good

Over: RED BULL SLOUGH

SHOAL COVE, Ketchikan Gateway, AK

Built 2011 Load: 70.0 t ADT: 5

MARGARET

Good

Over: NO DATA ENTERED

MARGARET, Ketchikan Gateway, AK

Built 2010 Load: 70.0 t

NO DATA ENTERED

Good

Over: PERM

ZAREMBO ISLAND, Wrangell City and, AK

Built 2002 Load: 70.0 t ADT: 5

NO DATA ENTERED

Good

Over: NO DATA ENTERED

ETOLIN ISLAND, Wrangell City and, AK

Built 2010 Load: 70.0 t

NO DATA ENTERED

Good

Over: GAME CREEK TRIBUTARY

GAME CREEK, Hoonah-Angoon, AK

Built 2012 Load: 70.3 t ADT: 50

NO DATA ENTERED

Good

Over: NO DATA ENTERED

RATZ, Prince of Wales-Hyder, AK

Built 2012 Load: 70.3 t ADT: 50

NO DATA ENTERED

Good

Over: NO DATA ENTERED

RATZ, Prince of Wales-Hyder, AK

Built 2012 Load: 70.3 t ADT: 50

NO DATA ENTERED

Good

Over: NO DATA ENTERED

WHALE PASS, Prince of Wales-Hyder, AK

Built 2012 Load: 70.3 t ADT: 10

Showing 751-800 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.