US Bridges

Ramp H1-I over Kap Off Ramp(hwy Up)

Good

Honolulu County, Hawaii · 0.11MI E/Old Waialae RD · Structure no. 003000H10202514

Built
1969
56 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
2,605 ft
15 main spans
Daily traffic
112,200
2017 count
Owner
State
State Highway Agency

About this bridge

Ramp H1-I over Kap Off Ramp(hwy Up) is a concrete continuous box beam or girders - multiple carrying Ramp H1-I over Kap Off Ramp(hwy Up) in Honolulu County, Hawaii. It was built in 1969, so it is 56 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 112,200 vehicles a day, roughly 2% of them trucks, projected to reach 141,757 by 2025. The structure is 2,605 ft (794 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRamp H1-I
CrossesKap Off Ramp(hwy Up)
Location0.11MI E/Old Waialae RD
RouteInterstate 0H1
CountyHonolulu County
StateHawaii
Coordinates21.28944, -157.81616
Functional classUrban Principal Arterial - Interstate

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating36.8 US tons
Inventory rating28.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans15
Design loadHS 20
Structure length2,605 ft (794 m)
Longest span145 ft (44.2 m)
Deck width38 ft (11.7 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112,200 (2017)
Projected traffic141,757 by 2025
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp H1-I over Kap Off Ramp(hwy Up) built?

It was built in 1969, making it 56 years old in 2025.

What condition is Ramp H1-I over Kap Off Ramp(hwy Up) 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 July 2023.

How much traffic does Ramp H1-I over Kap Off Ramp(hwy Up) carry?

About 112,200 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Ramp H1-I over Kap Off Ramp(hwy Up)?

The structure is 2,605 ft (794 m) long with a longest span of 145 ft (44.2 m) and a deck 38 ft wide.

Who owns Ramp H1-I over Kap Off Ramp(hwy Up)?

It is owned by the State Highway Agency.