US Bridges

Kaumualii HWY over Hoinakaunalehua Strm

Fair

Kauai County, Hawaii · 0.33MI Se/Kipu RD · Structure no. 007000500303031

Built
1937
88 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
28,400
2019 count
Owner
State
State Highway Agency

About this bridge

Kaumualii HWY over Hoinakaunalehua Strm is a concrete continuous culvert carrying Kaumualii HWY over Hoinakaunalehua Strm in Kauai County, Hawaii. It was built in 1937, so it is 88 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 28,400 vehicles a day, roughly 3% of them trucks, projected to reach 27,515 by 2025. The structure is 24 ft (7.2 m) long.

CarriesKaumualii HWY
CrossesHoinakaunalehua Strm
Location0.33MI Se/Kipu RD
RouteU.S. Route 50
StateHawaii
Coordinates21.96288, -159.40885
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.
Culvert6 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 evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length24 ft (7.2 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,400 (2019)
Projected traffic27,515 by 2025
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Kaumualii HWY over Hoinakaunalehua Strm built?

It was built in 1937, making it 88 years old in 2025.

What condition is Kaumualii HWY over Hoinakaunalehua 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 Hoinakaunalehua Strm carry?

About 28,400 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Kaumualii HWY over Hoinakaunalehua Strm?

The structure is 24 ft (7.2 m) long with a longest span of 11 ft (3.5 m).

Who owns Kaumualii HWY over Hoinakaunalehua Strm?

It is owned by the State Highway Agency.