US Bridges

Kaumualii HWY over Wahiawa Strm

Fair

Kauai County, Hawaii · 2.05MI Se/Mehana RD · Structure no. 007000500301972

Built
1936
89 years old
Condition
Fair
inspected May 2023
Type
Frame
Concrete Continuous
Length
182 ft
3 main spans
Daily traffic
14,600
2017 count
Owner
State
State Highway Agency

About this bridge

Kaumualii HWY over Wahiawa Strm is a concrete continuous frame carrying Kaumualii HWY over Wahiawa Strm in Kauai County, Hawaii. It was built in 1936, so it is 89 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 14,600 vehicles a day, roughly 3% of them trucks, projected to reach 15,763 by 2025. The structure is 182 ft (55.5 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesKaumualii HWY
CrossesWahiawa Strm
Location2.05MI Se/Mehana RD
RouteU.S. Route 50
CountyKauai County
StateHawaii
Coordinates21.92167, -159.54901
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating38.3 US tons
Inventory rating29.3 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length182 ft (55.5 m)
Longest span125 ft (38.1 m)
Deck width31 ft (9.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,600 (2017)
Projected traffic15,763 by 2025
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
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$6.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Kaumualii HWY over Wahiawa Strm built?

It was built in 1936, making it 89 years old in 2025.

What condition is Kaumualii HWY over Wahiawa 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 May 2023.

How much traffic does Kaumualii HWY over Wahiawa Strm carry?

About 14,600 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Kaumualii HWY over Wahiawa Strm?

The structure is 182 ft (55.5 m) long with a longest span of 125 ft (38.1 m) and a deck 31 ft wide.

Who owns Kaumualii HWY over Wahiawa Strm?

It is owned by the State Highway Agency.