US Bridges

Irr:miijuu Way over Hydaburg Creek

Fair

Prince of Wales-Hyder Census Area, Alaska · Mile Point 0.1 · Structure no. 0316

Built
1970
55 years old, rebuilt 1985
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
96
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Irr:miijuu Way over Hydaburg Creek is a steel stringer/multi-beam or girder carrying Irr:miijuu Way over Hydaburg Creek in Prince of Wales-Hyder Census Area, Alaska. It was built in 1970 and reconstructed in 1985, so it is 55 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 96 vehicles a day, roughly 7% of them trucks, projected to reach 150 by 2035. The structure is 50 ft (15.2 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesIrr:miijuu Way
CrossesHydaburg Creek
LocationMile Point 0.1
RouteState Highway NSPCY
StateAlaska
Coordinates55.206, -132.8261
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.8 US tons
Inventory rating34.7 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2018)
Projected traffic150 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
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:miijuu Way over Hydaburg Creek built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1985.

What condition is Irr:miijuu Way over Hydaburg 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 July 2023.

How much traffic does Irr:miijuu Way over Hydaburg Creek carry?

About 96 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is Irr:miijuu Way over Hydaburg Creek?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 31 ft wide.

Who owns Irr:miijuu Way over Hydaburg Creek?

It is owned by the City or Municipal Highway Agency.