Bridge conditions in Glenn County, California
240 inventoried bridges · 17 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
17 of the 240 bridges the federal inventory lists in Glenn County are rated poor; the rest split 91 good and 132 fair.
- 17 of the 240 bridges in Glenn County, California, are rated in poor condition (7.1%) in the 2025 National Bridge Inventory, as of .
- 91 bridges (37.9%) are rated good and 132 (55.0%) fair.
- The median Glenn County bridge was built in 1953.
- The busiest poor-rated bridge is Road 99W over Stony Creek (built 1913), carrying about 4,157 vehicles a day.
Good 37.9% · Fair 55.0% · Poor 7.1% of 240 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 |
|---|---|---|---|
| Road 99W over Stony Creek | 1913 | 4,157 | Poor |
| State Route 162 over Sacramento River | 1948 | 2,400 | Poor |
| State Route 162 over Sacramento River Ovfl | 1911 | 1,500 | Poor |
| Road #61 over Willow Creek | 1949 | 928 | Poor |
| Road #48 over Branch Walker Creek | 1940 | 647 | Poor |
| County Road Z over Angel Slough | 1925 | 586 | Poor |
| County Rd 306 over Salt Creek | 1948 | 300 | Poor |
| Irr County Rd 306 over Watson Creek | 1930 | 268 | Poor |
| County Road 306 over Branch Stony Creek | 1930 | 235 | Poor |
| Road Y over Mckee Overflow | 1935 | 157 | Poor |
| Irr Road 305 over Watson Creek | 1920 | 120 | Poor |
| Road 67 over Howard Slough | 1950 | 93 | Poor |
| County Road 200 over Branch Salt Creek | 1925 | 91 | Poor |
| County Rd R over Glenn-colusa Canal | 1950 | 85 | Poor |
| Road 200A over Stony Creek | 1960 | 63 | Poor |
| County Road 303 over S Fk Willow Creek | 1920 | 56 | Poor |
| County Road 303 over Clarks Valley Creek | 1935 | 27 | Poor |
Busiest bridges in the 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 |
| Interstate 5 NB over Cfnr Spur | 1966 | 13,000 | Good |
| Interstate 5 over Wilson Creek | 1966 | 12,750 | Good |
| Interstate 5 over Wilson Creek | 1966 | 12,750 | Good |
| Interstate 5 over South Fork Willow Creek | 1966 | 12,750 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of California: California 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.