US Bridges

Coffman Cove Road over Logjam Creek

Fair

Prince of Wales-Hyder Census Area, Alaska · Mile Point 4.4 · Structure no. 1717

Built
2003
22 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
96 ft
1 main span
Daily traffic
120
2020 count
Owner
State
State Highway Agency

About this bridge

Coffman Cove Road over Logjam Creek is a steel stringer/multi-beam or girder carrying Coffman Cove Road over Logjam Creek in Prince of Wales-Hyder Census Area, Alaska. It was built in 2003, so it is 22 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 120 vehicles a day, roughly 21% of them trucks, projected to reach 290 by 2039. The structure is 96 ft (29.3 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCoffman Cove Road
CrossesLogjam Creek
LocationMile Point 4.4
RouteState Highway 0
CountyPrince of Wales-Hyder Census Area
StateAlaska
Coordinates55.9054, -133.0076
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length96 ft (29.3 m)
Longest span94 ft (28.7 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2020)
Projected traffic290 by 2039
Trucks21%
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 Coffman Cove Road over Logjam Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is Coffman Cove Road over Logjam 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 2023.

How much traffic does Coffman Cove Road over Logjam Creek carry?

About 120 vehicles per day (2020 count), of which roughly 21% are trucks.

How long is Coffman Cove Road over Logjam Creek?

The structure is 96 ft (29.3 m) long with a longest span of 94 ft (28.7 m) and a deck 26 ft wide.

Who owns Coffman Cove Road over Logjam Creek?

It is owned by the State Highway Agency.