US Bridges

Douglas Highway over Lawson Creek

Fair

Juneau City and Borough, Alaska · Mile Point 1.5 · Structure no. 0788

Built
1935
90 years old, rebuilt 1974
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
304 ft
4 main spans
Daily traffic
6,160
2020 count
Owner
State
State Highway Agency

About this bridge

Douglas Highway over Lawson Creek is a steel continuous stringer/multi-beam or girder carrying Douglas Highway over Lawson Creek in Juneau City and Borough, Alaska. It was built in 1935 and reconstructed in 1974, so it is 90 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 6,160 vehicles a day, roughly 7% of them trucks, projected to reach 7,880 by 2039. The structure is 304 ft (92.7 m) long and 46 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesDouglas Highway
CrossesLawson Creek
LocationMile Point 1.5
RouteState Highway 958
CountyJuneau City and Borough
StateAlaska
Coordinates58.285, -134.41111
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.9 US tons
Inventory rating29.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length304 ft (92.7 m)
Longest span80 ft (24.4 m)
Deck width46 ft (14.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,160 (2020)
Projected traffic7,880 by 2039
Trucks7%
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 Douglas Highway over Lawson Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1974.

What condition is Douglas Highway over Lawson 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 Douglas Highway over Lawson Creek carry?

About 6,160 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Douglas Highway over Lawson Creek?

The structure is 304 ft (92.7 m) long with a longest span of 80 ft (24.4 m) and a deck 46 ft wide.

Who owns Douglas Highway over Lawson Creek?

It is owned by the State Highway Agency.