Structure 1310001100002 · Hawaii County, HI

Old Mamalahoa HWY over Opea Stream

Carries Old Mamalahoa HWY over Opea Stream, Tmk: 3-2-001:018.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT42 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 4/9 · sets the ratingSubstructure 6/9

42 ft end to end. 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.

Built1912114 years old
Length42.0 ft12.8 m
Daily traffic20counted 1986
Last inspectedJune 2023every 24 months

Location

StateHawaii
CountyHawaii
LocationTmk: 3-2-001:018
CarriesOld Mamalahoa HWY
CrossesOpea Stream
Coordinates19.92133, -155.15484

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length42.0 ft (12.8 m)
Max Span42.0 ft (12.8 m)
Deck Width18.7 ft (5.7 m)
Deck Area73.0 sq m
Main Spans1
Year Built1912

Traffic

Avg Daily Traffic20 (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 Number001310001100002

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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