US Bridges

2100000-6.5 over Tributary to 12-MILE Ck

Good

Prince of Wales-Hyder Census Area, Alaska · 12 Mile · Structure no. 100551000020462

Built
2015
10 years old
Condition
Good
inspected May 2024
Type
Slab
Wood or Timber
Length
30 ft
1 main span
Daily traffic
10
2018 count
Owner
Federal
U.S. Forest Service

About this bridge

2100000-6.5 over Tributary to 12-MILE Ck is a wood or timber slab carrying 2100000-6.5 over Tributary to 12-MILE Ck in Prince of Wales-Hyder Census Area, Alaska. It was built in 2015, so it is 10 years old, younger 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 10 vehicles a day, projected to reach 15 by 2045. The structure is 30 ft (9.1 m) long and 16 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Carries2100000-6.5
CrossesTributary to 12-MILE Ck
Location12 Mile
RouteFederal Lands Road 21000
StateAlaska
Coordinates55.34246, -132.72302
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 protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating98.9 US tons
Inventory rating76.1 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHL 93
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2018)
Projected traffic15 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 2100000-6.5 over Tributary to 12-MILE Ck built?

It was built in 2015, making it 10 years old in 2025.

What condition is 2100000-6.5 over Tributary to 12-MILE Ck 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 May 2024.

How much traffic does 2100000-6.5 over Tributary to 12-MILE Ck carry?

About 10 vehicles per day (2018 count).

How long is 2100000-6.5 over Tributary to 12-MILE Ck?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 16 ft wide.

Who owns 2100000-6.5 over Tributary to 12-MILE Ck?

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