Bridge conditions in Hawaii County, Hawaii
231 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Hawaii County tracks close to typical: 8 of its 231 inventoried bridges (3.5%) are rated poor, against a national rate of about 7%.
- 8 of the 231 bridges in Hawaii County, Hawaii, are rated in poor condition (3.5%) in the 2025 National Bridge Inventory, as of .
- 100 bridges (43.3%) are rated good and 123 (53.2%) fair.
- The median Hawaii County bridge was built in 1959.
- The busiest poor-rated bridge is Pauahi St over Waiolama Canal (built 1949), carrying about 9,600 vehicles a day.
Good 43.3% · Fair 53.2% · Poor 3.5% of 231 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Pauahi St over Waiolama Canal | 1949 | 9,600 | Poor |
| Hawaii Belt Rd over Nanue Strm | 1952 | 6,700 | Poor |
| Hawaii Belt Rd over Hakalau Strm | 1953 | 6,700 | Poor |
| Mamalahoa over Hanawi Strm | 1922 | 600 | Poor |
| Old Mamalahoa Hwy over Kawainui Stream | 1900 | 400 | Poor |
| Old Mamalahoa Hwy over Kaula Gulch | 1928 | 300 | Poor |
| Old Mamalahoa H over Kaiwilahilahi Strm | 1923 | 40 | Poor |
| Old Mamalahoa Hwy over Opea Stream | 1912 | 20 | Poor |
Busiest bridges in the 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 |
| Kuakini Highway over Twn Mtl Pl Culvt | 1984 | 25,300 | Fair |
| Hi Blt Rd Palani R over Tpl Mtl Pl Culvt | 1984 | 25,200 | Good |
| Hi Belt Rd Palani over Twn Mtl Pl Culvt | 1984 | 25,200 | Good |
| Keaau-Pahoa Bypass over Unknown Stream | 2004 | 24,330 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Hawaii: Hawaii bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.