Old Mamalahoa Hwy over Kawainui Stream
Hawaii County, Hawaii · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Old Mamalahoa Hwy over Kawainui Stream in Hawaii County, Hawaii, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1900 and reconstructed in 2009, making it 125 years old at the 2025 inventory.
- It carries about 400 vehicles a day (traffic count year 1986).
- Its listed owner is the county highway agency.
- It is one of 8 of the 231 inventoried bridges in Hawaii County rated poor (3.5%); 8 (3.5%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (19.82033, -155.09481)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Timber girder and floorbeam |
| Length | about 79 ft |
| Location | Tmk 2-7-11:2 |
| NBI structure number | 001270001100007 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Hawaii department of transportation.
Busiest bridges in Hawaii County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Hawaii Belt Rd over Panaewa Strm | 1950 | 35,200 | Fair |
| Keeau-pahoa Hwy over Waipahoehoe Strm | 1968 | 26,700 | Good |
| Route 11 over Unmd Glh | 1984 | 25,900 | Good |
| Route 11 over Unmd Glh | 1984 | 25,400 | Good |
| Hi Blt Rd Palani R over Unmd Glh Tpl Mtl Culvt | 1984 | 25,400 | Good |
| Route 11 over Unmd Glh | 1984 | 25,400 | Good |
All bridges nearby: Hawaii County, HI bridge conditions · every bridge in Hawaii County · Hawaii bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.