US Bridges

Honoapiilani HWY over Olowalu "b" Unmd Strm

Fair

Maui County, Hawaii · 0.37MI S/Ng Rifle Range R · Structure no. 009000300301971

Built
1938
87 years old, rebuilt 1990
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
27,400
2017 count
Owner
State
State Highway Agency

About this bridge

Honoapiilani HWY over Olowalu "b" Unmd Strm is a concrete slab carrying Honoapiilani HWY over Olowalu "b" Unmd Strm in Maui County, Hawaii. It was built in 1938 and reconstructed in 1990, so it is 87 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 27,400 vehicles a day, roughly 5% of them trucks, projected to reach 30,460 by 2025. The structure is 26 ft (7.9 m) long and 38 ft wide.

Location

Open in Google Maps
CarriesHonoapiilani HWY
CrossesOlowalu "b" Unmd Strm
Location0.37MI S/Ng Rifle Range R
RouteU.S. Route 30
CountyMaui County
StateHawaii
Coordinates20.82974, -156.63681
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating28.5 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length26 ft (7.9 m)
Longest span23 ft (7.1 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,400 (2017)
Projected traffic30,460 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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$1.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Honoapiilani HWY over Olowalu "b" Unmd Strm built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1990.

What condition is Honoapiilani HWY over Olowalu "b" Unmd Strm 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 July 2024.

How much traffic does Honoapiilani HWY over Olowalu "b" Unmd Strm carry?

About 27,400 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Honoapiilani HWY over Olowalu "b" Unmd Strm?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7.1 m) and a deck 38 ft wide.

Who owns Honoapiilani HWY over Olowalu "b" Unmd Strm?

It is owned by the State Highway Agency.