US Bridges

Piihonua RD over Piihonua-Wailuku River

Fair

Hawaii County, Hawaii · Tmk 2-5-009:004 · Structure no. 001250001100003

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
370
1986 count
Owner
County
County Highway Agency

About this bridge

Piihonua RD over Piihonua-Wailuku River is a concrete culvert carrying Piihonua RD over Piihonua-Wailuku River in Hawaii County, Hawaii. It was built in 1973, so it is 52 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 370 vehicles a day, projected to reach 463 by 2025. The structure is 24 ft (7.3 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesPiihonua RD
CrossesPiihonua-Wailuku River
LocationTmk 2-5-009:004
CountyHawaii County
StateHawaii
Coordinates19.71392, -155.13767
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic370 (1986)
Projected traffic463 by 2025
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed3.7 mi (6 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$166,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Piihonua RD over Piihonua-Wailuku River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Piihonua RD over Piihonua-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 September 2023.

How much traffic does Piihonua RD over Piihonua-Wailuku River carry?

About 370 vehicles per day (1986 count).

How long is Piihonua RD over Piihonua-Wailuku River?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 28 ft wide.

Who owns Piihonua RD over Piihonua-Wailuku River?

It is owned by the County Highway Agency.