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Piilani Hwy over Waiakoa Gulch

Maui County, Hawaii · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Piilani Hwy over Waiakoa Gulch in Maui County, Hawaii, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 2007, making it 18 years old at the 2025 inventory.
It carries about 42,400 vehicles a day (traffic count year 2017).
Its listed owner is the state highway agency.
It is one of 108 of the 187 inventoried bridges in Maui County rated fair (57.8%); 13 (7.0%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Continuous prestressed concrete stringer or multi-beam girder
Length	about 167 ft
Location	0.14MI SE/N Kihei Rd
NBI structure number	009000310300014
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Hawaii department of transportation.

Bridge	Built	Vehicles/day	Condition
Piilani Hwy over Waiakoa Gulch	1980	42,400	Fair
Piilani Hwy over Kulanihakoi Gulch	1980	42,400	Fair
Piilani Hwy over Waipuilani Gulch Br	1980	42,400	Fair
S Kihei Rd over Kulanihakoa Ditch	2015	42,400	Good
Hoanoapiilani Hwy over Diversion Ditch	2010	41,357	Good
Hana Hwy over Kalialinui Strm	1944	37,400	Fair