US Bridges

Dalton Highway over Marx Creek

Fair

North Slope Borough, Alaska · Mile Point 253.8 · Structure no. 4050

Built
1972
53 years old
Condition
Fair
inspected July 2024
Type
Culvert
Steel
Length
24 ft
3 main spans
Daily traffic
130
2020 count
Owner
State
State Highway Agency

About this bridge

Dalton Highway over Marx Creek is a steel culvert carrying Dalton Highway over Marx Creek in North Slope Borough, 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 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 130 vehicles a day, roughly 75% of them trucks, projected to reach 190 by 2039. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesDalton Highway
CrossesMarx Creek
LocationMile Point 253.8
RouteState Highway 65
StateAlaska
Coordinates68.22311, -149.40733
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
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 length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2020)
Projected traffic190 by 2039
Trucks75%
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 Marx Creek built?

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

What condition is Dalton Highway over Marx 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 Dalton Highway over Marx Creek carry?

About 130 vehicles per day (2020 count), of which roughly 75% are trucks.

How long is Dalton Highway over Marx Creek?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m).

Who owns Dalton Highway over Marx Creek?

It is owned by the State Highway Agency.