US Bridges

Dalton Highway over Lost Creek

Good

Yukon-Koyukuk Census Area, Alaska · Mile Point 5.6 · Structure no. 4093

Built
1972
53 years old
Condition
Good
inspected July 2024
Type
Culvert
Steel
Length
22 ft
3 main spans
Daily traffic
180
2020 count
Owner
State
State Highway Agency

About this bridge

Dalton Highway over Lost Creek is a steel culvert carrying Dalton Highway over Lost Creek in Yukon-Koyukuk Census Area, Alaska. It was built in 1972, so it is 53 years old, older than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 180 vehicles a day, roughly 53% of them trucks, projected to reach 210 by 2039. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesDalton Highway
CrossesLost Creek
LocationMile Point 5.6
RouteState Highway 0
StateAlaska
Coordinates65.517, -148.80371
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadH 20
Structure length22 ft (6.7 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2020)
Projected traffic210 by 2039
Trucks53%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free 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 Dalton Highway over Lost Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Dalton Highway over Lost Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Dalton Highway over Lost Creek carry?

About 180 vehicles per day (2020 count), of which roughly 53% are trucks.

How long is Dalton Highway over Lost Creek?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.8 m).

Who owns Dalton Highway over Lost Creek?

It is owned by the State Highway Agency.