US Bridges

Queen Kaahumanu H over Kamakoa Gulch

Fair

Hawaii County, Hawaii · 22.28MI N/Keahole Air Acc · Structure no. 001000190302911

Built
1974
51 years old
Condition
Fair
inspected May 2024
Type
Culvert
Steel
Length
69 ft
4 main spans
Daily traffic
12,700
2019 count
Owner
State
State Highway Agency

About this bridge

Queen Kaahumanu H over Kamakoa Gulch is a steel culvert carrying Queen Kaahumanu H over Kamakoa Gulch in Hawaii County, Hawaii. It was built in 1974, so it is 51 years old, younger 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 5 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 12,700 vehicles a day, roughly 6% of them trucks, projected to reach 13,710 by 2025. The structure is 69 ft (21 m) long.

CarriesQueen Kaahumanu H
CrossesKamakoa Gulch
Location22.28MI N/Keahole Air Acc
RouteU.S. Route 19
StateHawaii
Coordinates19.9703, -155.82075
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadHS 20
Structure length69 ft (21 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,700 (2019)
Projected traffic13,710 by 2025
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Queen Kaahumanu H over Kamakoa Gulch built?

It was built in 1974, making it 51 years old in 2025.

What condition is Queen Kaahumanu H over Kamakoa Gulch 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 May 2024.

How much traffic does Queen Kaahumanu H over Kamakoa Gulch carry?

About 12,700 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is Queen Kaahumanu H over Kamakoa Gulch?

The structure is 69 ft (21 m) long with a longest span of 15 ft (4.6 m).

Who owns Queen Kaahumanu H over Kamakoa Gulch?

It is owned by the State Highway Agency.