US Bridges

Kawaihae-Mahukona over Unmd Strm-Tpl Mtl Culvt

Good

Hawaii County, Hawaii · 5.60MI N/Maluokalani ST · Structure no. 001002700500655

Built
1966
59 years old
Condition
Good
inspected April 2024
Type
Culvert
Steel
Length
34 ft
3 main spans
Daily traffic
3,100
2017 count
Owner
State
State Highway Agency

About this bridge

Kawaihae-Mahukona over Unmd Strm-Tpl Mtl Culvt is a steel culvert carrying Kawaihae-Mahukona over Unmd Strm-Tpl Mtl Culvt in Hawaii County, Hawaii. It was built in 1966, so it is 59 years old, younger 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 3,100 vehicles a day, roughly 6% of them trucks, projected to reach 5,473 by 2025. The structure is 34 ft (10.4 m) long and 56 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesKawaihae-Mahukona
CrossesUnmd Strm-Tpl Mtl Culvt
Location5.60MI N/Maluokalani ST
RouteU.S. Route 270
StateHawaii
Coordinates20.11915, -155.87976
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating50 US tons
Inventory rating32 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span9 ft (2.8 m)
Deck width56 ft (17.1 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2017)
Projected traffic5,473 by 2025
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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$702,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kawaihae-Mahukona over Unmd Strm-Tpl Mtl Culvt built?

It was built in 1966, making it 59 years old in 2025.

What condition is Kawaihae-Mahukona over Unmd Strm-Tpl Mtl Culvt 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 Unmd Strm-Tpl Mtl Culvt carry?

About 3,100 vehicles per day (2017 count), of which roughly 6% are trucks.

How long is Kawaihae-Mahukona over Unmd Strm-Tpl Mtl Culvt?

The structure is 34 ft (10.4 m) long with a longest span of 9 ft (2.8 m) and a deck 56 ft wide.

Who owns Kawaihae-Mahukona over Unmd Strm-Tpl Mtl Culvt?

It is owned by the State Highway Agency.