US Bridges

Chiniak Highway over Felton Creek

Fair

Kodiak Island Borough, Alaska · Mile Point 9.6 · Structure no. 0386

Built
1974
51 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
63 ft
2 main spans
Daily traffic
470
2020 count
Owner
State
State Highway Agency

About this bridge

Chiniak Highway over Felton Creek is a prestressed concrete tee beam carrying Chiniak Highway over Felton Creek in Kodiak Island Borough, Alaska. It was built in 1974, so it is 51 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 470 vehicles a day, roughly 15% of them trucks, projected to reach 1,300 by 2039. The structure is 63 ft (19.2 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesChiniak Highway
CrossesFelton Creek
LocationMile Point 9.6
RouteState Highway 391
StateAlaska
Coordinates57.63902, -152.50934
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
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating92.8 US tons
Inventory rating42.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span31 ft (9.4 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic470 (2020)
Projected traffic1,300 by 2039
Trucks15%
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

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 Chiniak Highway over Felton Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is Chiniak Highway over Felton 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 September 2024.

How much traffic does Chiniak Highway over Felton Creek carry?

About 470 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Chiniak Highway over Felton Creek?

The structure is 63 ft (19.2 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.

Who owns Chiniak Highway over Felton Creek?

It is owned by the State Highway Agency.