US Bridges

Hoanoapiilani HWY over Diversion Ditch

Good

Maui County, Hawaii · _ · Structure no. 009000300401744

Built
2010
15 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete
Length
58 ft
2 main spans
Daily traffic
41,357
2008 count
Owner
County
County Highway Agency

About this bridge

Hoanoapiilani HWY over Diversion Ditch is a concrete culvert carrying Hoanoapiilani HWY over Diversion Ditch in Maui County, Hawaii. It was built in 2010, so it is 15 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 41,357 vehicles a day, projected to reach 42,000 by 2012. The structure is 58 ft (17.8 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHoanoapiilani HWY
CrossesDiversion Ditch
Location_
RouteState Highway 30
CountyMaui County
StateHawaii
Coordinates20.8525, -156.66083
Functional classRural Minor Collector

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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating27.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length58 ft (17.8 m)
Longest span28 ft (8.5 m)
Deck width60 ft (18.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,357 (2008)
Projected traffic42,000 by 2012
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hoanoapiilani HWY over Diversion Ditch built?

It was built in 2010, making it 15 years old in 2025.

What condition is Hoanoapiilani HWY over Diversion Ditch 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 January 2024.

How much traffic does Hoanoapiilani HWY over Diversion Ditch carry?

About 41,357 vehicles per day (2008 count).

How long is Hoanoapiilani HWY over Diversion Ditch?

The structure is 58 ft (17.8 m) long with a longest span of 28 ft (8.5 m) and a deck 60 ft wide.

Who owns Hoanoapiilani HWY over Diversion Ditch?

It is owned by the County Highway Agency.