US Bridges

3030000-12.71 over Perm

Good

Prince of Wales-Hyder Census Area, Alaska · Coffman · Structure no. 100540000001112

Built
1986
39 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
96 ft
1 main span
Daily traffic
50
2006 count
Owner
Federal
U.S. Forest Service

About this bridge

3030000-12.71 over Perm is a prestressed concrete stringer/multi-beam or girder carrying 3030000-12.71 over Perm in Prince of Wales-Hyder Census Area, Alaska. It was built in 1986, so it is 39 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 8 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 200 by 2013. The structure is 96 ft (29.3 m) long and 30 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Carries3030000-12.71
CrossesPerm
LocationCoffman
RouteState Highway COFFM
StateAlaska
Coordinates55.98248, -132.88418
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating52.1 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadOther
Structure length96 ft (29.3 m)
Longest span94 ft (28.5 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2006)
Projected traffic200 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$232,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 3030000-12.71 over Perm built?

It was built in 1986, making it 39 years old in 2025.

What condition is 3030000-12.71 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 3030000-12.71 over Perm carry?

About 50 vehicles per day (2006 count).

How long is 3030000-12.71 over Perm?

The structure is 96 ft (29.3 m) long with a longest span of 94 ft (28.5 m) and a deck 30 ft wide.

Who owns 3030000-12.71 over Perm?

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