US Bridges

3015000-6.44 over Mod

Fair

Prince of Wales-Hyder Census Area, Alaska · Thorne Bay · Structure no. 100540000001098

Built
1981
44 years old, rebuilt 2004
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
5
2018 count
Owner
Federal
U.S. Forest Service

About this bridge

3015000-6.44 over Mod is a steel stringer/multi-beam or girder carrying 3015000-6.44 over Mod in Prince of Wales-Hyder Census Area, Alaska. It was built in 1981 and reconstructed in 2004, so it is 44 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 5 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 5 vehicles a day, projected to reach 5 by 2013. The structure is 70 ft (21.3 m) long and 18 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

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Carries3015000-6.44
CrossesMod
LocationThorne Bay
RouteFederal Lands Road 30150
CountyPrince of Wales-Hyder Census Area
StateAlaska
Coordinates55.78813, -132.66931
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadOther
Structure length70 ft (21.3 m)
Longest span69 ft (20.9 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2018)
Projected traffic5 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$180,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 3015000-6.44 over Mod built?

It was built in 1981, making it 44 years old in 2025. It was reconstructed in 2004.

What condition is 3015000-6.44 over Mod 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 2023.

How much traffic does 3015000-6.44 over Mod carry?

About 5 vehicles per day (2018 count).

How long is 3015000-6.44 over Mod?

The structure is 70 ft (21.3 m) long with a longest span of 69 ft (20.9 m) and a deck 18 ft wide.

Who owns 3015000-6.44 over Mod?

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