US Bridges

Kawaihae-Mahukona over Kawaihae Strm

Good

Hawaii County, Hawaii · 0.70MI N/Spencer Pk RD · Structure no. 001000270300326

Built
1960
65 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
52 ft
2 main spans
Daily traffic
7,500
2017 count
Owner
State
State Highway Agency

About this bridge

Kawaihae-Mahukona over Kawaihae Strm is a concrete continuous slab carrying Kawaihae-Mahukona over Kawaihae Strm in Hawaii County, Hawaii. It was built in 1960, so it is 65 years old, older than the Hawaii average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,500 vehicles a day, roughly 9% of them trucks, projected to reach 6,828 by 2025. The structure is 52 ft (16 m) long and 42 ft wide. If it were closed, the detour would be 50.3 mi (81 km).

CarriesKawaihae-Mahukona
CrossesKawaihae Strm
Location0.70MI N/Spencer Pk RD
RouteU.S. Route 270
StateHawaii
Coordinates20.03733, -155.82711
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length52 ft (16 m)
Longest span25 ft (7.5 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2017)
Projected traffic6,828 by 2025
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed50.3 mi (81 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$356,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kawaihae-Mahukona over Kawaihae Strm built?

It was built in 1960, making it 65 years old in 2025.

What condition is Kawaihae-Mahukona over Kawaihae Strm in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does Kawaihae-Mahukona over Kawaihae Strm carry?

About 7,500 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is Kawaihae-Mahukona over Kawaihae Strm?

The structure is 52 ft (16 m) long with a longest span of 25 ft (7.5 m) and a deck 42 ft wide.

Who owns Kawaihae-Mahukona over Kawaihae Strm?

It is owned by the State Highway Agency.