Iris Road over Drainage Channel
Riverside County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Iris Road over Drainage Channel in Riverside County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1940, making it 85 years old at the 2025 inventory.
- It carries about 3,000 vehicles a day (traffic count year 2015).
- It is one of 462 of the 1,120 inventoried bridges in Riverside County rated fair (41.2%); 18 (1.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2023, on a 24-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 → (33.88818, -117.2459)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 28 ft |
| Location | Approximately 500 feet we |
| NBI structure number | AFCAPDPG6603B |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Riverside County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 91 over BNSF Ry Amtrak Metrolink | 1970 | 270,000 | Fair |
| State Route 91 over Serfas Drive | 1970 | 269,000 | Good |
| Route 91 over Buena Vista Avenue | 1961 | 268,000 | Fair |
| State Route 91 over E91-n71 Connctr (future) | 1970 | 267,000 | Good |
| State Route 91 over Coal Canyon | 1970 | 264,000 | Good |
| State Route 91 over State Route 71 | 1970 | 264,000 | Good |
All bridges nearby: Riverside County, CA bridge conditions · every bridge in Riverside County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.