US Bridges

Chiniak Highway over Salonie Creek No. 1

Fair

Kodiak Island Borough, Alaska · Mile Point 0.7 · Structure no. 0992

Built
1980
45 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
114 ft
3 main spans
Daily traffic
600
2020 count
Owner
State
State Highway Agency

About this bridge

Chiniak Highway over Salonie Creek No. 1 is a prestressed concrete tee beam carrying Chiniak Highway over Salonie Creek No. 1 in Kodiak Island Borough, Alaska. It was built in 1980, so it is 45 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 600 vehicles a day, roughly 15% of them trucks, projected to reach 1,200 by 2039. The structure is 114 ft (34.7 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesChiniak Highway
CrossesSalonie Creek No. 1
LocationMile Point 0.7
RouteState Highway 391
CountyKodiak Island Borough
StateAlaska
Coordinates57.69631, -152.56066
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating96.8 US tons
Inventory rating44.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length114 ft (34.7 m)
Longest span38 ft (11.6 m)
Deck width31 ft (9.4 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2020)
Projected traffic1,200 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 Salonie Creek No. 1 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Chiniak Highway over Salonie Creek No. 1 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 Salonie Creek No. 1 carry?

About 600 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Chiniak Highway over Salonie Creek No. 1?

The structure is 114 ft (34.7 m) long with a longest span of 38 ft (11.6 m) and a deck 31 ft wide.

Who owns Chiniak Highway over Salonie Creek No. 1?

It is owned by the State Highway Agency.