US Bridges

Kaiulani ST over Wailuku River

Fair

Hawaii County, Hawaii · Tmk: 2-3-014:012 · Structure no. 001230001100003

Built
1940
85 years old, rebuilt 2014
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
175 ft
9 main spans
Daily traffic
375
2006 count
Owner
County
County Highway Agency

About this bridge

Kaiulani ST over Wailuku River is a steel stringer/multi-beam or girder carrying Kaiulani ST over Wailuku River in Hawaii County, Hawaii. It was built in 1940 and reconstructed in 2014, so it is 85 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 375 vehicles a day, roughly 2% of them trucks, projected to reach 400 by 2026. The structure is 175 ft (53.3 m) long and 20 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesKaiulani ST
CrossesWailuku River
LocationTmk: 2-3-014:012
CountyHawaii County
StateHawaii
Coordinates19.72469, -155.09271
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating33.2 US tons
Inventory rating25.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans9
Design loadHL 93
Structure length175 ft (53.3 m)
Longest span23 ft (7 m)
Deck width20 ft (6.1 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2006)
Projected traffic400 by 2026
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.2 mi (2 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$45,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Kaiulani ST over Wailuku River built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2014.

What condition is Kaiulani ST over Wailuku River 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 May 2024.

How much traffic does Kaiulani ST over Wailuku River carry?

About 375 vehicles per day (2006 count), of which roughly 2% are trucks.

How long is Kaiulani ST over Wailuku River?

The structure is 175 ft (53.3 m) long with a longest span of 23 ft (7 m) and a deck 20 ft wide.

Who owns Kaiulani ST over Wailuku River?

It is owned by the County Highway Agency.