Structure 1410001100001 · Hawaii County, HI

Old Mamalahoa HWY over Kaula Gulch

Carries Old Mamalahoa HWY over Kaula Gulch, Tmk 4-1-01:15.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 4/9 · sets the rating

52 ft end to end, longest span 17 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a girder bridge.

Built1928rebuilt 2009
Length52.2 ft15.9 m
Daily traffic300counted 1986
Last inspectedJune 2023every 24 months

Location

StateHawaii
CountyHawaii
LocationTmk 4-1-01:15
CarriesOld Mamalahoa HWY
CrossesKaula Gulch
Coordinates20.00947, -155.28601

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length52.2 ft (15.9 m)
Max Span17.1 ft (5.2 m)
Deck Width16.1 ft (4.9 m)
Deck Area77.9 sq m
Main Spans3
Year Built1928 (reconstructed 2009)

Traffic

Avg Daily Traffic300 (1986)
Lanes On Bridge1

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number001410001100001

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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