US Bridges

3000000-55.37 over Perm

Good

Prince of Wales-Hyder Census Area, Alaska · Coffman · Structure no. 100540000001080

Built
1983
42 years old, rebuilt 1992
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
1 main span
Daily traffic
50
2006 count
Owner
Federal
U.S. Forest Service

About this bridge

3000000-55.37 over Perm is a steel stringer/multi-beam or girder carrying 3000000-55.37 over Perm in Prince of Wales-Hyder Census Area, Alaska. It was built in 1983 and reconstructed in 1992, so it is 42 years old, older than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, projected to reach 190 by 2013. The structure is 120 ft (36.6 m) long and 26 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Carries3000000-55.37
CrossesPerm
LocationCoffman
RouteState Highway COFFM
StateAlaska
Coordinates55.90816, -132.93146
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating51.8 US tons

Structure

MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadOther
Structure length120 ft (36.6 m)
Longest span118 ft (36.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2006)
Projected traffic190 by 2013
Trucks—
Lanes on structure2
Traffic directionTwo-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$280,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 3000000-55.37 over Perm built?

It was built in 1983, making it 42 years old in 2025. It was reconstructed in 1992.

What condition is 3000000-55.37 over Perm in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does 3000000-55.37 over Perm carry?

About 50 vehicles per day (2006 count).

How long is 3000000-55.37 over Perm?

The structure is 120 ft (36.6 m) long with a longest span of 118 ft (36.1 m) and a deck 26 ft wide.

Who owns 3000000-55.37 over Perm?

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