US Bridges

N School ST over Nuuanu Strm

Fair

Honolulu County, Hawaii · 225S/STILLMAN/N Sch ST · Structure no. 003083631400271

Built
1932
93 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete
Length
129 ft
3 main spans
Daily traffic
18,244
1987 count
Owner
County
County Highway Agency

About this bridge

N School ST over Nuuanu Strm is a concrete tee beam carrying N School ST over Nuuanu Strm in Honolulu County, Hawaii. It was built in 1932, so it is 93 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 18,244 vehicles a day, projected to reach 22,805 by 2025. The structure is 129 ft (39.3 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesN School ST
CrossesNuuanu Strm
Location225S/STILLMAN/N Sch ST
RouteCity Street 7414
StateHawaii
Coordinates21.31844, -157.8574
Functional classUrban Minor 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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length129 ft (39.3 m)
Longest span49 ft (14.9 m)
Deck width60 ft (18.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,244 (1987)
Projected traffic22,805 by 2025
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 N School ST over Nuuanu Strm built?

It was built in 1932, making it 93 years old in 2025.

What condition is N School ST over Nuuanu Strm 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 November 2024.

How much traffic does N School ST over Nuuanu Strm carry?

About 18,244 vehicles per day (1987 count).

How long is N School ST over Nuuanu Strm?

The structure is 129 ft (39.3 m) long with a longest span of 49 ft (14.9 m) and a deck 60 ft wide.

Who owns N School ST over Nuuanu Strm?

It is owned by the County Highway Agency.