US Bridges

Kaumualii HWY over Waihohonu Strm

Fair

Kauai County, Hawaii · 2.08MI Se/Omao RD · Structure no. 007000500302613

Built
1934
91 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
15,400
2019 count
Owner
State
State Highway Agency

About this bridge

Kaumualii HWY over Waihohonu Strm is a concrete slab carrying Kaumualii HWY over Waihohonu Strm in Kauai County, Hawaii. It was built in 1934, 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 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 15,400 vehicles a day, roughly 2% of them trucks, projected to reach 16,148 by 2025. The structure is 22 ft (6.8 m) long and 28 ft wide.

Location

Open in Google Maps
CarriesKaumualii HWY
CrossesWaihohonu Strm
Location2.08MI Se/Omao RD
RouteU.S. Route 50
CountyKauai County
StateHawaii
Coordinates21.94948, -159.46722
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.2 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length22 ft (6.8 m)
Longest span20 ft (6.1 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,400 (2019)
Projected traffic16,148 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$157,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kaumualii HWY over Waihohonu Strm built?

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

What condition is Kaumualii HWY over Waihohonu 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 January 2025.

How much traffic does Kaumualii HWY over Waihohonu Strm carry?

About 15,400 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Kaumualii HWY over Waihohonu Strm?

The structure is 22 ft (6.8 m) long with a longest span of 20 ft (6.1 m) and a deck 28 ft wide.

Who owns Kaumualii HWY over Waihohonu Strm?

It is owned by the State Highway Agency.