US Bridges

Kaumualii Highway over Nawiliwili Stream Ob

Good

Kauai County, Hawaii · 0.08 MI SW Hoomana RD · Structure no. 007000500403272

Built
2014
11 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
315 ft
3 main spans
Daily traffic
34,100
2017 count
Owner
State
State Highway Agency

About this bridge

Kaumualii Highway over Nawiliwili Stream Ob is a prestressed concrete stringer/multi-beam or girder carrying Kaumualii Highway over Nawiliwili Stream Ob in Kauai County, Hawaii. It was built in 2014, so it is 11 years old, younger than the Hawaii average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 34,100 vehicles a day, roughly 3% of them trucks, projected to reach 18,900 by 2035. The structure is 315 ft (96 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesKaumualii Highway
CrossesNawiliwili Stream Ob
Location0.08 MI SW Hoomana RD
RouteU.S. Route 50
StateHawaii
Coordinates21.97556, -159.37389
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating52.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHL 93
Structure length315 ft (96 m)
Longest span105 ft (32 m)
Deck width50 ft (15.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,100 (2017)
Projected traffic18,900 by 2035
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Kaumualii Highway over Nawiliwili Stream Ob built?

It was built in 2014, making it 11 years old in 2025.

What condition is Kaumualii Highway over Nawiliwili Stream Ob in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does Kaumualii Highway over Nawiliwili Stream Ob carry?

About 34,100 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Kaumualii Highway over Nawiliwili Stream Ob?

The structure is 315 ft (96 m) long with a longest span of 105 ft (32 m) and a deck 50 ft wide.

Who owns Kaumualii Highway over Nawiliwili Stream Ob?

It is owned by the State Highway Agency.