Structure 7000500301258 · Kauai County, HI

Kaumualii HWY over Mahinauli Strm

Carries Kaumualii HWY over Mahinauli Strm, 0.27mi Se/makaweli P.o..

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT122 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

122 ft end to end, longest span 37 ft. Lengths and the semi-truck 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 tee-beam bridge.

Built194878 years old
Length122.0 ft37.2 m
Daily traffic11,800counted 2019
Last inspectedJanuary 2025every 24 months

Location

StateHawaii
CountyKauai
Location0.27mi Se/makaweli P.o.
CarriesKaumualii HWY
CrossesMahinauli Strm
Coordinates21.93248, -159.64072

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length122.0 ft (37.2 m)
Max Span37.4 ft (11.4 m)
Deck Width37.1 ft (11.3 m)
Deck Area420.4 sq m
Main Spans4
Year Built1948

Traffic

Avg Daily Traffic11,800 (2019)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number007000500301258

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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