US Bridges

IRR BIA RTE 461 over Unnamed Creek

Fair

Prince of Wales-Hyder Census Area, Alaska · 18.6 Miles East of Hydabu · Structure no. E09211T0461-200

Built
1997
28 years old
Condition
Fair
inspected June 2023
Type
Girder and Floorbeam System
Steel
Length
32 ft
1 main span
Daily traffic
10
2021 count
Owner
Tribal
Indian Tribal Government

About this bridge

IRR BIA RTE 461 over Unnamed Creek is a steel girder and floorbeam system carrying IRR BIA RTE 461 over Unnamed Creek in Prince of Wales-Hyder Census Area, Alaska. It was built in 1997, so it is 28 years old, younger 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 12 by 2041. The structure is 32 ft (9.8 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesIRR BIA RTE 461
CrossesUnnamed Creek
Location18.6 Miles East of Hydabu
RouteFederal Lands Road 461
CountyPrince of Wales-Hyder Census Area
StateAlaska
Coordinates55.26012, -132.48922
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2021)
Projected traffic12 by 2041
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerIndian Tribal Government
Maintained byIndian Tribal Government
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE 461 over Unnamed Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is IRR BIA RTE 461 over Unnamed Creek 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 June 2023.

How much traffic does IRR BIA RTE 461 over Unnamed Creek carry?

About 10 vehicles per day (2021 count).

How long is IRR BIA RTE 461 over Unnamed Creek?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 16 ft wide.

Who owns IRR BIA RTE 461 over Unnamed Creek?

It is owned by the Indian Tribal Government.