Bridge conditions in Gilliam County, Oregon
35 inventoried bridges · 0 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
None of the 35 inventoried bridges in Gilliam County are rated in poor condition in the current federal inventory. 16 are rated good and 19 fair.
- 0 of the 35 bridges in Gilliam County, Oregon, are rated in poor condition (0.0%) in the 2025 National Bridge Inventory, as of .
- 16 bridges (45.7%) are rated good and 19 (54.3%) fair.
- The median Gilliam County bridge was built in 1967.
Good 45.7% · Fair 54.3% · Poor 0.0% of 35 bridges
Bridges rated poor
No bridges in this county carry a poor rating in the current inventory.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-84 (hwy 002) over Blalock Canyon Rd | 1964 | 14,269 | Fair |
| I-84 (hwy 002) over John Day River | 1963 | 14,253 | Fair |
| I-84 (hwy 002) over Arlington Viaduct | 1964 | 14,069 | Fair |
| I-84 (hwy 002) WB over Willow Creek West | 1954 | 7,076 | Fair |
| I-84 (hwy 002) EB over Willow Creek EB | 1965 | 7,076 | Fair |
| Or 19 (hwy 005) over China Creek | 1964 | 1,331 | Good |
| Or 19 (hwy 005) over China Creek | 1995 | 991 | Good |
| Or 19 (hwy 005) over Thirtymile CR | 1972 | 551 | Good |
| Or 19 (hwy 005) over Condon Canyon CR | 1972 | 551 | Good |
| Or 19 (hwy 005) over Condon Canyon CR | 1972 | 551 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Oregon: Oregon 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.