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Old Mamalahoa H over Kaiwilahilahi Strm

Hawaii County, Hawaii · rated Poor in the 2025 National Bridge Inventory

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

Old Mamalahoa H over Kaiwilahilahi Strm in Hawaii County, Hawaii, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1923, making it 102 years old at the 2025 inventory.
It carries about 40 vehicles a day (traffic count year 1987).
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.

Component ratings

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

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