US Bridges

Kuamoo HWY over Opaekaa Strm

Fair

Kauai County, Hawaii · 0.63MI Nw/Kuhio HWY · Structure no. 007005800600062

Built
1936
89 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete
Length
53 ft
1 main span
Daily traffic
9,600
2017 count
Owner
State
State Highway Agency

About this bridge

Kuamoo HWY over Opaekaa Strm is a concrete tee beam carrying Kuamoo HWY over Opaekaa 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 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 9,600 vehicles a day, roughly 2% of them trucks, projected to reach 10,326 by 2025. The structure is 53 ft (16.1 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesKuamoo HWY
CrossesOpaekaa Strm
Location0.63MI Nw/Kuhio HWY
RouteU.S. Route 580
StateHawaii
Coordinates22.04975, -159.34456
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34 US tons
Inventory rating26.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length53 ft (16.1 m)
Longest span52 ft (15.7 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,600 (2017)
Projected traffic10,326 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$306,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kuamoo HWY over Opaekaa Strm built?

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

What condition is Kuamoo HWY over Opaekaa 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 Kuamoo HWY over Opaekaa Strm carry?

About 9,600 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Kuamoo HWY over Opaekaa Strm?

The structure is 53 ft (16.1 m) long with a longest span of 52 ft (15.7 m) and a deck 27 ft wide.

Who owns Kuamoo HWY over Opaekaa Strm?

It is owned by the State Highway Agency.