US Bridges

Dalton Highway over Douglas Creek

Fair

Yukon-Koyukuk Census Area, Alaska · Mile Point 141.7 · Structure no. 4047

Built
1972
53 years old
Condition
Fair
inspected July 2024
Type
Culvert
Steel
Length
27 ft
2 main spans
Daily traffic
140
2020 count
Owner
State
State Highway Agency

About this bridge

Dalton Highway over Douglas Creek is a steel culvert carrying Dalton Highway over Douglas 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 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 140 vehicles a day, roughly 74% of them trucks, projected to reach 290 by 2039. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesDalton Highway
CrossesDouglas Creek
LocationMile Point 141.7
RouteState Highway 65
CountyYukon-Koyukuk Census Area
StateAlaska
Coordinates66.85621, -150.5648
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 protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than 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 spans2
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2020)
Projected traffic290 by 2039
Trucks74%
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 Douglas Creek built?

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

What condition is Dalton Highway over Douglas 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 Douglas Creek carry?

About 140 vehicles per day (2020 count), of which roughly 74% are trucks.

How long is Dalton Highway over Douglas Creek?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).

Who owns Dalton Highway over Douglas Creek?

It is owned by the State Highway Agency.