US Bridges

Kam HWY over Kawailoa Strm

Good

Honolulu County, Hawaii · 0.62MI Ne/Ashley RD · Structure no. 003000830300456

Built
1929
96 years old
Condition
Good
inspected May 2024
Type
Tee Beam
Concrete
Length
25 ft
1 main span
Daily traffic
12,700
2017 count
Owner
State
State Highway Agency

About this bridge

Kam HWY over Kawailoa Strm is a concrete tee beam carrying Kam HWY over Kawailoa Strm in Honolulu County, Hawaii. It was built in 1929, so it is 96 years old, older 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 12,700 vehicles a day, roughly 3% of them trucks, projected to reach 16,348 by 2025. The structure is 25 ft (7.6 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesKam HWY
CrossesKawailoa Strm
Location0.62MI Ne/Ashley RD
RouteU.S. Route 83
StateHawaii
Coordinates21.6283, -158.07335
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating43 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,700 (2017)
Projected traffic16,348 by 2025
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$170,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kam HWY over Kawailoa Strm built?

It was built in 1929, making it 96 years old in 2025.

What condition is Kam HWY over Kawailoa Strm 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 May 2024.

How much traffic does Kam HWY over Kawailoa Strm carry?

About 12,700 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Kam HWY over Kawailoa Strm?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 38 ft wide.

Who owns Kam HWY over Kawailoa Strm?

It is owned by the State Highway Agency.