US Bridges

99SB 23A over Ph Ramp Wn-Ph I.C. #3

Fair

Honolulu County, Hawaii · 0.35 MI S/Plt DR Sep · Structure no. 003000990402336

Built
1975
50 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
301 ft
2 main spans
Daily traffic
7,100
2017 count
Owner
State
State Highway Agency

About this bridge

99SB 23A over Ph Ramp Wn-Ph I.C. #3 is a prestressed concrete continuous box beam or girders - multiple carrying 99SB 23A over Ph Ramp Wn-Ph I.C. #3 in Honolulu County, Hawaii. It was built in 1975, so it is 50 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 7,100 vehicles a day, roughly 5% of them trucks, projected to reach 34,268 by 2025. The structure is 301 ft (91.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries99SB 23A
CrossesPh Ramp Wn-Ph I.C. #3
Location0.35 MI S/Plt DR Sep
RouteU.S. Route 99
StateHawaii
Coordinates21.34706, -157.93405
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating87.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length301 ft (91.7 m)
Longest span191 ft (58.2 m)
Deck width43 ft (13.1 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,100 (2017)
Projected traffic34,268 by 2025
Trucks5%
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 99SB 23A over Ph Ramp Wn-Ph I.C. #3 built?

It was built in 1975, making it 50 years old in 2025.

What condition is 99SB 23A over Ph Ramp Wn-Ph I.C. #3 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 July 2023.

How much traffic does 99SB 23A over Ph Ramp Wn-Ph I.C. #3 carry?

About 7,100 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is 99SB 23A over Ph Ramp Wn-Ph I.C. #3?

The structure is 301 ft (91.7 m) long with a longest span of 191 ft (58.2 m) and a deck 43 ft wide.

Who owns 99SB 23A over Ph Ramp Wn-Ph I.C. #3?

It is owned by the State Highway Agency.