Iao Valley Rd over Iao Strm
Maui County, Hawaii · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Iao Valley Rd over Iao Strm in Maui County, Hawaii, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1955, making it 70 years old at the 2025 inventory.
- It carries about 3,000 vehicles a day (traffic count year 1980).
- Its listed owner is the county 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.
- 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 October 2024, on a 12-month routine inspection cycle.
- 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.
View this bridge on a map → (20.88292, -156.53378)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 123 ft |
| Location | Below Kapaniwai Park |
| NBI structure number | 009003201100001 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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.