US Bridges

Ramp Iw-B over Catlin DR

Fair

Honolulu County, Hawaii · Hnl Airport to H1 WB · Structure no. 003H1WB1146A063

Built
1980
45 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
1,260 ft
13 main spans
Daily traffic
5,700
2020 count
Owner
State
State Highway Agency

About this bridge

Ramp Iw-B over Catlin DR is a concrete continuous box beam or girders - single or spread carrying Ramp Iw-B over Catlin DR in Honolulu County, Hawaii. It was built in 1980, so it is 45 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 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 5,700 vehicles a day, roughly 3% of them trucks, projected to reach 8,208 by 2042. The structure is 1,260 ft (384 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesRamp Iw-B
CrossesCatlin DR
LocationHnl Airport to H1 WB
RouteInterstate 0H1
CountyHonolulu County
StateHawaii
Coordinates21.33775, -157.91592
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating38.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans13
Design loadHS 20
Structure length1,260 ft (384 m)
Longest span96 ft (29.3 m)
Deck width33 ft (10.2 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic5,700 (2020)
Projected traffic8,208 by 2042
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp Iw-B over Catlin DR built?

It was built in 1980, making it 45 years old in 2025.

What condition is Ramp Iw-B over Catlin DR 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 October 2024.

How much traffic does Ramp Iw-B over Catlin DR carry?

About 5,700 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Ramp Iw-B over Catlin DR?

The structure is 1,260 ft (384 m) long with a longest span of 96 ft (29.3 m) and a deck 33 ft wide.

Who owns Ramp Iw-B over Catlin DR?

It is owned by the State Highway Agency.