Home › Oregon › Sherman County › Blagg Lane over Grass Valley Canyon

Blagg Lane over Grass Valley Canyon

Sherman County, Oregon · rated Poor in the 2025 National Bridge Inventory

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

Blagg Lane over Grass Valley Canyon in Sherman County, Oregon, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 4 (poor condition) on the 0-9 scale.
It was built in 1957, making it 68 years old at the 2025 inventory.
It carries about 301 vehicles a day (traffic count year 2020).
Its listed owner is the county highway agency.
It is one of 2 of the 48 inventoried bridges in Sherman County rated poor (4.2%); 2 (4.2%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	4	Poor condition


Structure	Continuous concrete culvert
Length	about 22 ft
Location	0.03 Mi E of Hwy 97
NBI structure number	18017 000000000
Condition class	Poor

Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.

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