US Bridges

Kam HWY over Waiawa Sep(hwy Up)

Fair

Honolulu County, Hawaii · 0.25MI E/Leeward Coll Acc · Structure no. 003000990401815

Built
1953
72 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete Continuous
Length
154 ft
3 main spans
Daily traffic
59,100
2017 count
Owner
State
State Highway Agency

About this bridge

Kam HWY over Waiawa Sep(hwy Up) is a concrete continuous tee beam carrying Kam HWY over Waiawa Sep(hwy Up) in Honolulu County, Hawaii. It was built in 1953, so it is 72 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 59,100 vehicles a day, roughly 3% of them trucks, projected to reach 52,385 by 2025. The structure is 154 ft (46.9 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesKam HWY
CrossesWaiawa Sep(hwy Up)
Location0.25MI E/Leeward Coll Acc
RouteU.S. Route 99
CountyHonolulu County
StateHawaii
Coordinates21.39648, -157.97874
Functional classUrban Other Principal 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating41.1 US tons
Inventory rating31.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length154 ft (46.9 m)
Longest span66 ft (20.1 m)
Deck width40 ft (12.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,100 (2017)
Projected traffic52,385 by 2025
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 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$5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Kam HWY over Waiawa Sep(hwy Up) built?

It was built in 1953, making it 72 years old in 2025.

What condition is Kam HWY over Waiawa Sep(hwy Up) 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 Waiawa Sep(hwy Up) carry?

About 59,100 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Kam HWY over Waiawa Sep(hwy Up)?

The structure is 154 ft (46.9 m) long with a longest span of 66 ft (20.1 m) and a deck 40 ft wide.

Who owns Kam HWY over Waiawa Sep(hwy Up)?

It is owned by the State Highway Agency.