Perimeter Rd over Keehi Drainage Ditch
Honolulu County, Hawaii · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Perimeter Rd over Keehi Drainage Ditch in Honolulu 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 2002, making it 23 years old at the 2025 inventory.
- It carries about 1,999 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 272 of the 676 inventoried bridges in Honolulu County rated good (40.2%); 40 (5.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now good (deck 6 to 7).
- Its most recent inspection on record is dated November 2024, 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 → (21.33169, -157.90578)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 67 ft |
| Location | .2 mi west of Lagoon Dr |
| NBI structure number | 00300AIR1960100 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Hawaii department of transportation.
Busiest bridges in Honolulu County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai-h1 over 3-162" Sectl Pl Culvt | 1970 | 247,700 | Good |
| Fai-h1 over 2-180in Sectl Pl Culvt | 1970 | 247,700 | Good |
| Fai-h1 over Aiea Strm 15x12 Twn Culv | 1970 | 247,700 | Good |
| Fai-h1 over Waimalu Via-strm/hwy | 1970 | 244,000 | Fair |
| Fai-h1 over Pearl City Viaduct | 1969 | 231,700 | Fair |
| Fai-h1 over Waiau Ic-moanalua Rd | 1970 | 202,900 | Fair |
All bridges nearby: Honolulu County, HI bridge conditions · every bridge in Honolulu County · Hawaii bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.