US Bridges

Irr:marine HWY RTE over Chenega Ramp

FairPosted for load

County 063, Alaska · Chenega Bay · Structure no. 0185

Built
1995
30 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Steel
Length
131 ft
2 main spans
Daily traffic
10
2018 count
Owner
Local
Other Local Agency

About this bridge

Irr:marine HWY RTE over Chenega Ramp is a steel box beam or girders - multiple carrying Irr:marine HWY RTE over Chenega Ramp in County 063, Alaska. It was built in 1995, so it is 30 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. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, roughly 1% of them trucks, projected to reach 15 by 2035. The structure is 131 ft (39.9 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesIrr:marine HWY RTE
CrossesChenega Ramp
LocationChenega Bay
RouteState Highway 400
CountyCounty 063
StateAlaska
Coordinates60.06413, -148.00838
Functional classRural Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 rating110.1 US tons
Inventory rating63.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel
DeckConcrete, precast panels
Main spans2
Design loadHS 25 or greater
Structure length131 ft (39.9 m)
Longest span59 ft (18 m)
Deck width36 ft (11 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2018)
Projected traffic15 by 2035
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a toll road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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:marine HWY RTE over Chenega Ramp built?

It was built in 1995, making it 30 years old in 2025.

What condition is Irr:marine HWY RTE over Chenega Ramp 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 2024.

How much traffic does Irr:marine HWY RTE over Chenega Ramp carry?

About 10 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Irr:marine HWY RTE over Chenega Ramp?

The structure is 131 ft (39.9 m) long with a longest span of 59 ft (18 m) and a deck 36 ft wide.

Who owns Irr:marine HWY RTE over Chenega Ramp?

It is owned by the Other Local Agency.