US Bridges

Kaumualii HWY over Drainage Canal No 3

Fair

Kauai County, Hawaii · 3.16MI Se/Lio RD · Structure no. 007000500300535

Built
1957
68 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
3,400
2017 count
Owner
State
State Highway Agency

About this bridge

Kaumualii HWY over Drainage Canal No 3 is a concrete slab carrying Kaumualii HWY over Drainage Canal No 3 in Kauai County, Hawaii. It was built in 1957, so it is 68 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 3,400 vehicles a day, roughly 4% of them trucks, projected to reach 2,674 by 2025. The structure is 33 ft (10.1 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesKaumualii HWY
CrossesDrainage Canal No 3
Location3.16MI Se/Lio RD
RouteU.S. Route 50
CountyKauai County
StateHawaii
Coordinates21.97639, -159.73584
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 protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating33.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span29 ft (8.8 m)
Deck width44 ft (13.3 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2017)
Projected traffic2,674 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Kaumualii HWY over Drainage Canal No 3 built?

It was built in 1957, making it 68 years old in 2025.

What condition is Kaumualii HWY over Drainage Canal No 3 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 Drainage Canal No 3 carry?

About 3,400 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Kaumualii HWY over Drainage Canal No 3?

The structure is 33 ft (10.1 m) long with a longest span of 29 ft (8.8 m) and a deck 44 ft wide.

Who owns Kaumualii HWY over Drainage Canal No 3?

It is owned by the State Highway Agency.