US Bridges

Marine HWY Route over Ketchikan Berth I

Fair

Ketchikan Gateway Borough, Alaska · Mile Point 0.2 · Structure no. 0800

Built
1988
37 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Steel
Length
168 ft
1 main span
Daily traffic
164
2018 count
Owner
State
State Highway Agency

About this bridge

Marine HWY Route over Ketchikan Berth I is a steel box beam or girders - multiple carrying Marine HWY Route over Ketchikan Berth I in Ketchikan Gateway Borough, Alaska. It was built in 1988, so it is 37 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 164 vehicles a day, roughly 8% of them trucks, projected to reach 250 by 2035. The structure is 168 ft (51.2 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesMarine HWY Route
CrossesKetchikan Berth I
LocationMile Point 0.2
RouteState Highway 902
CountyKetchikan Gateway Borough
StateAlaska
Coordinates55.35385, -131.69444
Functional classUrban 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
Deck7 GoodSome minor problems.
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 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating51.7 US tons
Inventory rating31 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel
DeckOpen grating
Main spans1
Design loadHS 20
Structure length168 ft (51.2 m)
Longest span140 ft (42.7 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic164 (2018)
Projected traffic250 by 2035
Trucks8%
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 SystemYes

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 Marine HWY Route over Ketchikan Berth I built?

It was built in 1988, making it 37 years old in 2025.

What condition is Marine HWY Route over Ketchikan Berth 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 Marine HWY Route over Ketchikan Berth I carry?

About 164 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is Marine HWY Route over Ketchikan Berth I?

The structure is 168 ft (51.2 m) long with a longest span of 140 ft (42.7 m) and a deck 16 ft wide.

Who owns Marine HWY Route over Ketchikan Berth I?

It is owned by the State Highway Agency.