US Bridges

Kainahola RD over Kainahola Strm Br #1

FairPosted for load

Kauai County, Hawaii · 0.28MI N/Waipouli-K JCT · Structure no. 007440181144002

Built
1900
125 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
340
1986 count
Owner
County
County Highway Agency

About this bridge

Kainahola RD over Kainahola Strm Br #1 is a steel stringer/multi-beam or girder carrying Kainahola RD over Kainahola Strm Br #1 in Kauai County, Hawaii. It was built in 1900, so it is 125 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 340 vehicles a day, projected to reach 425 by 2025. The structure is 36 ft (11.1 m) long and 17 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesKainahola RD
CrossesKainahola Strm Br #1
Location0.28MI N/Waipouli-K JCT
RouteCounty Highway 44018
CountyKauai County
StateHawaii
Coordinates22.0903, -159.37092
Functional classRural Minor Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating15.8 US tons
Inventory rating12.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length36 ft (11.1 m)
Longest span30 ft (9.2 m)
Deck width17 ft (5.1 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic340 (1986)
Projected traffic425 by 2025
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$221,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kainahola RD over Kainahola Strm Br #1 built?

It was built in 1900, making it 125 years old in 2025.

What condition is Kainahola RD over Kainahola Strm Br #1 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 2024.

How much traffic does Kainahola RD over Kainahola Strm Br #1 carry?

About 340 vehicles per day (1986 count).

How long is Kainahola RD over Kainahola Strm Br #1?

The structure is 36 ft (11.1 m) long with a longest span of 30 ft (9.2 m) and a deck 17 ft wide.

Who owns Kainahola RD over Kainahola Strm Br #1?

It is owned by the County Highway Agency.