US Bridges

Irr:old Align Rich over Klutina River

Fair

County 066, Alaska · Mile Point 0.5 · Structure no. 0572

Built
1957
68 years old, rebuilt 1999
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
243 ft
2 main spans
Daily traffic
480
2020 count
Owner
State
State Highway Agency

About this bridge

Irr:old Align Rich over Klutina River is a steel continuous stringer/multi-beam or girder carrying Irr:old Align Rich over Klutina River in County 066, Alaska. It was built in 1957 and reconstructed in 1999, so it is 68 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 480 vehicles a day, roughly 10% of them trucks, projected to reach 580 by 2039. The structure is 243 ft (74.1 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesIrr:old Align Rich
CrossesKlutina River
LocationMile Point 0.5
RouteState Highway 71
CountyCounty 066
StateAlaska
Coordinates61.95194, -145.3075
Functional classRural Major 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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100.2 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length243 ft (74.1 m)
Longest span120 ft (36.6 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2020)
Projected traffic580 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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:old Align Rich over Klutina River built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1999.

What condition is Irr:old Align Rich over Klutina River 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 August 2023.

How much traffic does Irr:old Align Rich over Klutina River carry?

About 480 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Irr:old Align Rich over Klutina River?

The structure is 243 ft (74.1 m) long with a longest span of 120 ft (36.6 m) and a deck 26 ft wide.

Who owns Irr:old Align Rich over Klutina River?

It is owned by the State Highway Agency.