Bridge conditions in Modoc County, California
87 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
1 of the 87 bridges the federal inventory lists in Modoc County are rated poor; the rest split 43 good and 43 fair.
- 1 of the 87 bridges in Modoc County, California, are rated in poor condition (1.1%) in the 2025 National Bridge Inventory, as of .
- 43 bridges (49.4%) are rated good and 43 (49.4%) fair.
- The median Modoc County bridge was built in 1968.
- The busiest poor-rated bridge is State Route 299 over Pit River (built 1962), carrying about 1,200 vehicles a day.
Good 49.4% · Fair 49.4% · Poor 1.1% of 87 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 |
|---|---|---|---|
| State Route 299 over Pit River | 1962 | 1,200 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. Highway 395 over North Fork Pit River | 1982 | 4,000 | Fair |
| U.S. Highway 395 over Parker Creek | 1954 | 4,000 | Fair |
| State Route 299 over Rattlesnake Creek | 1980 | 3,000 | Good |
| State Route 299 over Rock Creek | 1937 | 2,800 | Good |
| U.S. Highway 395 over South Fork Pit River | 1971 | 2,400 | Fair |
| U.S. Highway 395 over South Fork Pit River | 1971 | 2,400 | Good |
| U.S. Highway 395 over UP RR | 1971 | 2,400 | Fair |
| U.S. Highway 395 over UP RR | 1971 | 2,400 | Fair |
| State Route 299 over W Br Cloverswale Creek | 1920 | 2,200 | Fair |
| Lookout-hackmore R over Pit River | 1975 | 2,068 | 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.