US Bridges

Dalton Highway over Dan Creek

Fair

North Slope Borough, Alaska · Mile Point 331.0 · Structure no. 1521

Built
1982
43 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
41 ft
1 main span
Daily traffic
130
2020 count
Owner
State
State Highway Agency

About this bridge

Dalton Highway over Dan Creek is a wood or timber stringer/multi-beam or girder carrying Dalton Highway over Dan Creek in North Slope Borough, Alaska. It was built in 1982, so it is 43 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 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 130 vehicles a day, roughly 75% of them trucks, projected to reach 190 by 2039. The structure is 41 ft (12.5 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesDalton Highway
CrossesDan Creek
LocationMile Point 331.0
RouteState Highway 65
StateAlaska
Coordinates69.0989, -148.83333
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.5 US tons
Inventory rating50 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span38 ft (11.7 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.5 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 Dan Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is Dalton Highway over Dan 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 Dan Creek carry?

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

How long is Dalton Highway over Dan Creek?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.7 m) and a deck 29 ft wide.

Who owns Dalton Highway over Dan Creek?

It is owned by the State Highway Agency.