US Bridges

Kaumualii HWY over Unnamed Stream

Fair

Kauai County, Hawaii · .08 MI E of Upa RD · Structure no. 007000500302388

Built
1933
92 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
15,200
2017 count
Owner
State
State Highway Agency

About this bridge

Kaumualii HWY over Unnamed Stream is a concrete continuous culvert carrying Kaumualii HWY over Unnamed Stream in Kauai County, Hawaii. It was built in 1933, so it is 92 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 15,200 vehicles a day, roughly 5% of them trucks, projected to reach 19,000 by 2028. The structure is 25 ft (7.7 m) long.

Location

Open in Google Maps
CarriesKaumualii HWY
CrossesUnnamed Stream
Location.08 MI E of Upa RD
RouteU.S. Route 50
CountyKauai County
StateHawaii
Coordinates21.92694, -159.48972
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.7 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,200 (2017)
Projected traffic19,000 by 2028
Trucks5%
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 statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Kaumualii HWY over Unnamed Stream built?

It was built in 1933, making it 92 years old in 2025.

What condition is Kaumualii HWY over Unnamed Stream 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 April 2023.

How much traffic does Kaumualii HWY over Unnamed Stream carry?

About 15,200 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Kaumualii HWY over Unnamed Stream?

The structure is 25 ft (7.7 m) long with a longest span of 12 ft (3.7 m).

Who owns Kaumualii HWY over Unnamed Stream?

It is owned by the State Highway Agency.