US Bridges

Dalton Highway over Minnie Creek

Fair

Yukon-Koyukuk Census Area, Alaska · Mile Point 186.7 · Structure no. 1335

Built
1972
53 years old, rebuilt 1992
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
122 ft
4 main spans
Daily traffic
140
2020 count
Owner
State
State Highway Agency

About this bridge

Dalton Highway over Minnie Creek is a steel stringer/multi-beam or girder carrying Dalton Highway over Minnie Creek in Yukon-Koyukuk Census Area, Alaska. It was built in 1972 and reconstructed in 1992, 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 62% of them trucks, projected to reach 560 by 2039. The structure is 122 ft (37.2 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesDalton Highway
CrossesMinnie Creek
LocationMile Point 186.7
RouteState Highway 65
CountyYukon-Koyukuk Census Area
StateAlaska
Coordinates67.42033, -150.07724
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: 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 rating72.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans4
Design loadHS 25 or greater
Structure length122 ft (37.2 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.4 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2020)
Projected traffic560 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 Minnie Creek built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 1992.

What condition is Dalton Highway over Minnie 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 Minnie Creek carry?

About 140 vehicles per day (2020 count), of which roughly 62% are trucks.

How long is Dalton Highway over Minnie Creek?

The structure is 122 ft (37.2 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns Dalton Highway over Minnie Creek?

It is owned by the State Highway Agency.