US Bridges

Kaumualii HWY over Lawai Strm

Fair

Kauai County, Hawaii · 0.01MI Se/Wawae RD · Structure no. 007000500302249

Built
1934
91 years old, rebuilt 2002
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
123 ft
1 main span
Daily traffic
20,600
2017 count
Owner
State
State Highway Agency

About this bridge

Kaumualii HWY over Lawai Strm is a prestressed concrete stringer/multi-beam or girder carrying Kaumualii HWY over Lawai Strm in Kauai County, Hawaii. It was built in 1934 and reconstructed in 2002, so it is 91 years old, older than the Hawaii average of 63.8 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 20,600 vehicles a day, roughly 2% of them trucks, projected to reach 20,629 by 2025. The structure is 123 ft (37.5 m) long and 69 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesKaumualii HWY
CrossesLawai Strm
Location0.01MI Se/Wawae RD
RouteU.S. Route 50
CountyKauai County
StateHawaii
Coordinates21.92636, -159.50869
Functional classRural Minor 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
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating30.3 US tons
Inventory rating23.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length123 ft (37.5 m)
Longest span111 ft (33.9 m)
Deck width69 ft (20.9 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,600 (2017)
Projected traffic20,629 by 2025
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Kaumualii HWY over Lawai Strm built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 2002.

What condition is Kaumualii HWY over Lawai Strm 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 February 2023.

How much traffic does Kaumualii HWY over Lawai Strm carry?

About 20,600 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Kaumualii HWY over Lawai Strm?

The structure is 123 ft (37.5 m) long with a longest span of 111 ft (33.9 m) and a deck 69 ft wide.

Who owns Kaumualii HWY over Lawai Strm?

It is owned by the State Highway Agency.