Structure 1270001100005 · Hawaii County, HI

Mamalahoa over Hanawi Strm

Carries Mamalahoa over Hanawi Strm, Tmk 2-7-09:13.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT79 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 4/9 · sets the rating

79 ft end to end, longest span 39 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 multi-beam bridge.

Built1922104 years old
Length79.1 ft24.1 m
Daily traffic600counted 1986
Last inspectedMarch 2023every 24 months

Location

StateHawaii
CountyHawaii
LocationTmk 2-7-09:13
CarriesMamalahoa
CrossesHanawi Strm
Coordinates19.80444, -155.09332

Physical Characteristics

MaterialConcrete Continuous
DesignStringer/Multi-beam
Total Length79.1 ft (24.1 m)
Max Span39.0 ft (11.9 m)
Deck Width20.0 ft (6.1 m)
Deck Area147.0 sq m
Main Spans2
Year Built1922

Traffic

Avg Daily Traffic600 (1986)
Lanes On Bridge1

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number001270001100005

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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