US Bridges

Hana HWY over Unnamed Strm

PoorPosted for load

Maui County, Hawaii · 5.07MI S/Rd to Hamoa · Structure no. 009003600904386

Built
1910
115 years old
Condition
Poor
inspected January 2025
Type
Stringer/Multi-beam or Girder
Concrete
Length
23 ft
1 main span
Daily traffic
450
1998 count
Owner
County
County Highway Agency

About this bridge

Hana HWY over Unnamed Strm is a concrete stringer/multi-beam or girder carrying Hana HWY over Unnamed Strm in Maui County, Hawaii. It was built in 1910, so it is 115 years old, older than the Hawaii average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 450 vehicles a day, projected to reach 563 by 2025. The structure is 23 ft (6.9 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesHana HWY
CrossesUnnamed Strm
Location5.07MI S/Rd to Hamoa
RouteCounty Highway 360
CountyMaui County
StateHawaii
Coordinates20.67632, -156.03277
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 6 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating20.7 US tons
Inventory rating16.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length23 ft (6.9 m)
Longest span21 ft (6.5 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (1998)
Projected traffic563 by 2025
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$161,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Hana HWY over Unnamed Strm built?

It was built in 1910, making it 115 years old in 2025.

What condition is Hana HWY over Unnamed Strm in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

How much traffic does Hana HWY over Unnamed Strm carry?

About 450 vehicles per day (1998 count).

How long is Hana HWY over Unnamed Strm?

The structure is 23 ft (6.9 m) long with a longest span of 21 ft (6.5 m) and a deck 16 ft wide.

Who owns Hana HWY over Unnamed Strm?

It is owned by the County Highway Agency.