US Bridges

Dalton Highway over Nutirwik Creek

Fair

Yukon-Koyukuk Census Area, Alaska · Mile Point 228.2 · Structure no. 1515

Built
1994
31 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
87 ft
1 main span
Daily traffic
110
2020 count
Owner
State
State Highway Agency

About this bridge

Dalton Highway over Nutirwik Creek is a steel stringer/multi-beam or girder carrying Dalton Highway over Nutirwik Creek in Yukon-Koyukuk Census Area, Alaska. It was built in 1994, so it is 31 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 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 110 vehicles a day, roughly 62% of them trucks, projected to reach 240 by 2039. The structure is 87 ft (26.5 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesDalton Highway
CrossesNutirwik Creek
LocationMile Point 228.2
RouteState Highway 65
CountyYukon-Koyukuk Census Area
StateAlaska
Coordinates67.93518, -149.81851
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length87 ft (26.5 m)
Longest span84 ft (25.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2020)
Projected traffic240 by 2039
Trucks62%
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 Nutirwik Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Dalton Highway over Nutirwik 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 Nutirwik Creek carry?

About 110 vehicles per day (2020 count), of which roughly 62% are trucks.

How long is Dalton Highway over Nutirwik Creek?

The structure is 87 ft (26.5 m) long with a longest span of 84 ft (25.7 m) and a deck 26 ft wide.

Who owns Dalton Highway over Nutirwik Creek?

It is owned by the State Highway Agency.