US Bridges

Circle Hot Springs over Deadwood Creek

Fair

Yukon-Koyukuk Census Area, Alaska · Mile Point 38.8 · Structure no. 0819

Built
1975
50 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
28 ft
1 main span
Daily traffic
120
2020 count
Owner
State
State Highway Agency

About this bridge

Circle Hot Springs over Deadwood Creek is a wood or timber stringer/multi-beam or girder carrying Circle Hot Springs over Deadwood Creek in Yukon-Koyukuk Census Area, Alaska. It was built in 1975, so it is 50 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 120 vehicles a day, roughly 10% of them trucks, projected to reach 210 by 2039. The structure is 28 ft (8.5 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCircle Hot Springs
CrossesDeadwood Creek
LocationMile Point 38.8
RouteState Highway 670
StateAlaska
Coordinates65.53923, -144.76452
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.8 US tons
Inventory rating44.8 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length28 ft (8.5 m)
Longest span25 ft (7.6 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2020)
Projected traffic210 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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 Circle Hot Springs over Deadwood Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Circle Hot Springs over Deadwood 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 August 2024.

How much traffic does Circle Hot Springs over Deadwood Creek carry?

About 120 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Circle Hot Springs over Deadwood Creek?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns Circle Hot Springs over Deadwood Creek?

It is owned by the State Highway Agency.