US Bridges

Ferry Shuttle RTE over Gravina Airport F.T. I

Fair

Ketchikan Gateway Borough, Alaska · Ketchikan Airport · Structure no. 0176

Built
1998
27 years old
Condition
Fair
inspected May 2023
Type
Orthotropic
Steel
Length
162 ft
1 main span
Daily traffic
348
2018 count
Owner
County
County Highway Agency

About this bridge

Ferry Shuttle RTE over Gravina Airport F.T. I is a steel orthotropic carrying Ferry Shuttle RTE over Gravina Airport F.T. I in Ketchikan Gateway Borough, Alaska. It was built in 1998, so it is 27 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 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 348 vehicles a day, roughly 6% of them trucks, projected to reach 850 by 2035. The structure is 162 ft (49.4 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesFerry Shuttle RTE
CrossesGravina Airport F.T. I
LocationKetchikan Airport
RouteState Highway 922
CountyKetchikan Gateway Borough
StateAlaska
Coordinates55.35658, -131.70736
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.8 US tons
Inventory rating36 US tons

Structure

Structure typeOrthotropic
MaterialSteel
DeckOpen grating
Main spans1 (+1 approach)
Design loadHS 20
Structure length162 ft (49.4 m)
Longest span142 ft (43.3 m)
Deck width20 ft (6.2 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic348 (2018)
Projected traffic850 by 2035
Trucks6%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Ferry Shuttle RTE over Gravina Airport F.T. I built?

It was built in 1998, making it 27 years old in 2025.

What condition is Ferry Shuttle RTE over Gravina Airport F.T. I 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 May 2023.

How much traffic does Ferry Shuttle RTE over Gravina Airport F.T. I carry?

About 348 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is Ferry Shuttle RTE over Gravina Airport F.T. I?

The structure is 162 ft (49.4 m) long with a longest span of 142 ft (43.3 m) and a deck 20 ft wide.

Who owns Ferry Shuttle RTE over Gravina Airport F.T. I?

It is owned by the County Highway Agency.