US Bridges

Williamsport/Pile over Chinkelyes Creek

Fair

Kenai Peninsula Borough, Alaska · Mile Point 3.5 · Structure no. 0484

Built
2002
23 years old
Condition
Fair
inspected July 2024
Type
Truss - Thru
Steel
Length
140 ft
1 main span
Daily traffic
20
2018 count
Owner
State
State Highway Agency

About this bridge

Williamsport/Pile over Chinkelyes Creek is a steel truss - thru carrying Williamsport/Pile over Chinkelyes Creek in Kenai Peninsula Borough, Alaska. It was built in 2002, so it is 23 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 20 vehicles a day, roughly 24% of them trucks, projected to reach 30 by 2035. The structure is 140 ft (42.7 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesWilliamsport/Pile
CrossesChinkelyes Creek
LocationMile Point 3.5
RouteState Highway NSP00
CountyKenai Peninsula Borough
StateAlaska
Coordinates59.70381, -153.71204
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.8 US tons
Inventory rating31.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length140 ft (42.7 m)
Longest span140 ft (42.7 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2018)
Projected traffic30 by 2035
Trucks24%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 Williamsport/Pile over Chinkelyes Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is Williamsport/Pile over Chinkelyes 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 July 2024.

How much traffic does Williamsport/Pile over Chinkelyes Creek carry?

About 20 vehicles per day (2018 count), of which roughly 24% are trucks.

How long is Williamsport/Pile over Chinkelyes Creek?

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

Who owns Williamsport/Pile over Chinkelyes Creek?

It is owned by the State Highway Agency.