US Bridges

Egan Drive over Salmon Creek

Fair

Juneau City and Borough, Alaska · Mile Point 3.4 · Structure no. 1188

Built
1973
52 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
121 ft
2 main spans
Daily traffic
13,800
2020 count
Owner
State
State Highway Agency

About this bridge

Egan Drive over Salmon Creek is a prestressed concrete stringer/multi-beam or girder carrying Egan Drive over Salmon Creek in Juneau City and Borough, Alaska. It was built in 1973, so it is 52 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 13,800 vehicles a day, roughly 2% of them trucks, projected to reach 22,400 by 2039. The structure is 121 ft (36.9 m) long and 133 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesEgan Drive
CrossesSalmon Creek
LocationMile Point 3.4
RouteState Highway 93
CountyJuneau City and Borough
StateAlaska
Coordinates58.33028, -134.47361
Functional classUrban Other Principal Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.5 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length121 ft (36.9 m)
Longest span60 ft (18.3 m)
Deck width133 ft (40.4 m)
Roadway width115 ft (34.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,800 (2020)
Projected traffic22,400 by 2039
Trucks2%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Egan Drive over Salmon Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Egan Drive over Salmon 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 June 2023.

How much traffic does Egan Drive over Salmon Creek carry?

About 13,800 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Egan Drive over Salmon Creek?

The structure is 121 ft (36.9 m) long with a longest span of 60 ft (18.3 m) and a deck 133 ft wide.

Who owns Egan Drive over Salmon Creek?

It is owned by the State Highway Agency.