US Bridges

Ahuimanu RD over Kahaluu Wpp A-1 Channel

Good

Honolulu County, Hawaii · Tmk 4-7-25 · Structure no. 003405001100001

Built
1985
40 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
2,482
1980 count
Owner
County
County Highway Agency

About this bridge

Ahuimanu RD over Kahaluu Wpp A-1 Channel is a prestressed concrete stringer/multi-beam or girder carrying Ahuimanu RD over Kahaluu Wpp A-1 Channel in Honolulu County, Hawaii. It was built in 1985, so it is 40 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 2,482 vehicles a day, projected to reach 3,000 by 2029. The structure is 44 ft (13.3 m) long and 60 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesAhuimanu RD
CrossesKahaluu Wpp A-1 Channel
LocationTmk 4-7-25
RouteCity Street 0
CountyHonolulu County
StateHawaii
Coordinates21.44797, -157.83446
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length44 ft (13.3 m)
Longest span41 ft (12.4 m)
Deck width60 ft (18.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,482 (1980)
Projected traffic3,000 by 2029
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ahuimanu RD over Kahaluu Wpp A-1 Channel built?

It was built in 1985, making it 40 years old in 2025.

What condition is Ahuimanu RD over Kahaluu Wpp A-1 Channel 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 January 2025.

How much traffic does Ahuimanu RD over Kahaluu Wpp A-1 Channel carry?

About 2,482 vehicles per day (1980 count).

How long is Ahuimanu RD over Kahaluu Wpp A-1 Channel?

The structure is 44 ft (13.3 m) long with a longest span of 41 ft (12.4 m) and a deck 60 ft wide.

Who owns Ahuimanu RD over Kahaluu Wpp A-1 Channel?

It is owned by the County Highway Agency.