US Bridges

3000000-23.23 over Perm

Fair

Prince of Wales-Hyder Census Area, Alaska · Thorne Bay · Structure no. 100540000001073

Built
1985
40 years old
Condition
Fair
inspected September 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
50
2006 count
Owner
Federal
U.S. Forest Service

About this bridge

3000000-23.23 over Perm is a prestressed concrete stringer/multi-beam or girder carrying 3000000-23.23 over Perm in Prince of Wales-Hyder Census Area, Alaska. It was built in 1985, so it is 40 years old, older than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 50 vehicles a day, projected to reach 200 by 2013. The structure is 72 ft (21.9 m) long and 17 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
Carries3000000-23.23
CrossesPerm
LocationThorne Bay
RouteFederal Lands Road 30000
CountyPrince of Wales-Hyder Census Area
StateAlaska
Coordinates55.75496, -132.49179
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadOther
Structure length72 ft (21.9 m)
Longest span70 ft (21.3 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2006)
Projected traffic200 by 2013
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$184,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 3000000-23.23 over Perm built?

It was built in 1985, making it 40 years old in 2025.

What condition is 3000000-23.23 over Perm in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2021.

How much traffic does 3000000-23.23 over Perm carry?

About 50 vehicles per day (2006 count).

How long is 3000000-23.23 over Perm?

The structure is 72 ft (21.9 m) long with a longest span of 70 ft (21.3 m) and a deck 17 ft wide.

Who owns 3000000-23.23 over Perm?

It is owned by the U.S. Forest Service.