US Bridges

Kalopa Road over Kalopa Gulch

FairPosted for load

Hawaii County, Hawaii · Tmk: 4-4-002:007 · Structure no. 001440001100009

Built
1930
95 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
53 ft
3 main spans
Daily traffic
90
1981 count
Owner
County
County Highway Agency

About this bridge

Kalopa Road over Kalopa Gulch is a wood or timber stringer/multi-beam or girder carrying Kalopa Road over Kalopa Gulch in Hawaii County, Hawaii. It was built in 1930, so it is 95 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 90 vehicles a day, projected to reach 113 by 2025. The structure is 53 ft (16.1 m) long and 20 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesKalopa Road
CrossesKalopa Gulch
LocationTmk: 4-4-002:007
RouteCounty Highway 0
CountyHawaii County
StateHawaii
Coordinates20.05816, -155.4179
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating12.9 US tons
Inventory rating10 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length53 ft (16.1 m)
Longest span15 ft (4.6 m)
Deck width20 ft (6.2 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (1981)
Projected traffic113 by 2025
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesRelief for waterway
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$236,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Kalopa Road over Kalopa Gulch built?

It was built in 1930, making it 95 years old in 2025.

What condition is Kalopa Road over Kalopa 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 October 2024.

How much traffic does Kalopa Road over Kalopa Gulch carry?

About 90 vehicles per day (1981 count).

How long is Kalopa Road over Kalopa Gulch?

The structure is 53 ft (16.1 m) long with a longest span of 15 ft (4.6 m) and a deck 20 ft wide.

Who owns Kalopa Road over Kalopa Gulch?

It is owned by the County Highway Agency.