Road D over Glenn-colusa Canal
Glenn County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Road D over Glenn-colusa Canal in Glenn County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1962, making it 63 years old at the 2025 inventory.
- It carries about 268 vehicles a day (traffic count year 2011).
- Its listed owner is the county highway agency.
- It is one of 132 of the 240 inventoried bridges in Glenn County rated fair (55.0%); 17 (7.1%) are rated poor.
- 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 → (39.41499, -122.2484)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 78 ft |
| Location | 0.6 Mi N/o Road 68 |
| NBI structure number | 11C0002 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Glenn County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 5 over Glenn-colusa Drain Ditch | 1966 | 26,000 | Good |
| Interstate 5 over Logan Creek | 1970 | 25,500 | Good |
| Interstate 5 over North Fork Logan Creek | 1970 | 25,500 | Good |
| Interstate 5 SB over Central Irrigation Canal | 1966 | 13,000 | Good |
| Interstate 5 NB over Central Irrigation Canal | 1966 | 13,000 | Good |
| Interstate 5 SB over Cfnr Spur | 1966 | 13,000 | Good |
All bridges nearby: Glenn County, CA bridge conditions · every bridge in Glenn County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.