US Bridges

2030790-0.03 over Mod

Fair

Prince of Wales-Hyder Census Area, Alaska · Thorne Bay · Structure no. 100540000001021

Built
1979
46 years old, rebuilt 1992
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
10
2006 count
Owner
Federal
U.S. Forest Service

About this bridge

2030790-0.03 over Mod is a steel stringer/multi-beam or girder carrying 2030790-0.03 over Mod in Prince of Wales-Hyder Census Area, Alaska. It was built in 1979 and reconstructed in 1992, so it is 46 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 10 vehicles a day, projected to reach 5 by 2013. The structure is 50 ft (15.2 m) long and 18 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
Carries2030790-0.03
CrossesMod
LocationThorne Bay
RouteFederal Lands Road 20307
CountyPrince of Wales-Hyder Census Area
StateAlaska
Coordinates55.39009, -132.34407
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
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 alignment6: Equal to present minimum 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 length50 ft (15.2 m)
Longest span49 ft (14.8 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2006)
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$140,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 2030790-0.03 over Mod built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 1992.

What condition is 2030790-0.03 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 July 2024.

How much traffic does 2030790-0.03 over Mod carry?

About 10 vehicles per day (2006 count).

How long is 2030790-0.03 over Mod?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.8 m) and a deck 18 ft wide.

Who owns 2030790-0.03 over Mod?

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