Hana Hwy over Hillside Bridge No. 4
Maui County, Hawaii · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Hana Hwy over Hillside Bridge No. 4 in Maui County, Hawaii, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2003, making it 22 years old at the 2025 inventory.
- It carries about 1,800 vehicles a day (traffic count year 2017).
- Its listed owner is the state highway agency.
- It is one of 66 of the 187 inventoried bridges in Maui County rated good (35.3%); 13 (7.0%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2023, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (20.85833, -156.16361)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Concrete slab |
| Length | about 129 ft |
| Location | 14.3mi NE/Hana Hwy |
| NBI structure number | 009003600501430 |
| Condition class | Good |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | July 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Hawaii department of transportation.
Busiest bridges in Maui County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Piilani Hwy over Waiakoa Gulch | 2007 | 42,400 | Fair |
| 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 |
All bridges nearby: Maui County, HI bridge conditions · every bridge in Maui County · Hawaii bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.