Home › Oregon › Sherman County

Bridge conditions in Sherman County, Oregon

48 inventoried bridges · 2 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

2 of the 48 bridges the federal inventory lists in Sherman County are rated poor; the rest split 13 good and 33 fair.

2 of the 48 bridges in Sherman County, Oregon, are rated in poor condition (4.2%) in the 2025 National Bridge Inventory, as of August 20, 2026.
13 bridges (27.1%) are rated good and 33 (68.8%) fair.
The median Sherman County bridge was built in 1963.
The busiest poor-rated bridge is Blagg Lane over Grass Valley Canyon (built 1957), carrying about 301 vehicles a day.

Good 27.1% · Fair 68.8% · Poor 4.2% of 48 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
Blagg Lane over Grass Valley Canyon	1957	301	Poor
Mud Hollow Rd. over Mud Hollow Creek	1970	43	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
I-84 (hwy 002) over Deschutes River	1964	16,485	Fair
I-84 (hwy 002) over Spanish Hollow Creek	1964	14,294	Fair
I-84 (hwy 002) over Conn Rd	1963	14,253	Good
I-84 (hwy 002) over Helms Creek	1964	14,253	Good
US 97 (hwy 042) over UPRR	2014	9,754	Good
US 97 (hwy 042) over I-84 (hwy 002)	2014	9,754	Good
I-84 (hwy 002) WB over UPRR	1965	7,148	Fair
I-84 (hwy 002) EB over UPRR	1965	7,148	Fair
I-84 (hwy 002) EB over Rufus Conn	1965	7,148	Good
I-84 (hwy 002) WB over Rufus Conn	1965	7,148	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.