US Bridges

Kam HWY over FAI-H1 Waiawa Ic #4A

Fair

Honolulu County, Hawaii · 0.05MI S/Rd to Waipahu · Structure no. 003000990401689

Built
1968
57 years old
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
489 ft
5 main spans
Daily traffic
13,700
2017 count
Owner
State
State Highway Agency

About this bridge

Kam HWY over FAI-H1 Waiawa Ic #4A is a concrete continuous box beam or girders - multiple carrying Kam HWY over FAI-H1 Waiawa Ic #4A in Honolulu County, Hawaii. It was built in 1968, so it is 57 years old, younger 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 13,700 vehicles a day, roughly 2% of them trucks, projected to reach 50,323 by 2025. The structure is 489 ft (149 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesKam HWY
CrossesFAI-H1 Waiawa Ic #4A
Location0.05MI S/Rd to Waipahu
RouteU.S. Route 99
CountyHonolulu County
StateHawaii
Coordinates21.39796, -157.99164
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating25 US tons
Inventory rating19.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length489 ft (149 m)
Longest span125 ft (38.1 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,700 (2017)
Projected traffic50,323 by 2025
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Kam HWY over FAI-H1 Waiawa Ic #4A built?

It was built in 1968, making it 57 years old in 2025.

What condition is Kam HWY over FAI-H1 Waiawa Ic #4A 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 December 2024.

How much traffic does Kam HWY over FAI-H1 Waiawa Ic #4A carry?

About 13,700 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Kam HWY over FAI-H1 Waiawa Ic #4A?

The structure is 489 ft (149 m) long with a longest span of 125 ft (38.1 m) and a deck 37 ft wide.

Who owns Kam HWY over FAI-H1 Waiawa Ic #4A?

It is owned by the State Highway Agency.