Home › Oregon › Douglas County › Tiller-trail HWY#1 over Diamond Creek

Tiller-trail HWY#1 over Diamond Creek

Douglas County, Oregon · rated Good in the 2025 National Bridge Inventory

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

Tiller-trail HWY#1 over Diamond Creek in Douglas County, Oregon, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 2009, making it 16 years old at the 2025 inventory.
It carries about 546 vehicles a day (traffic count year 2020).
Its listed owner is the county highway agency.
It is one of 246 of the 703 inventoried bridges in Douglas County rated good (35.0%); 17 (2.4%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 276 ft
Location	7.3 Mi SE of Drew Po
NBI structure number	20502 0001 3881
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-5 (hwy 001) over I-5 @ Bellows St	1976	46,894	Fair
I-5 (hwy 001) over I-5 @ Harvard Ave	1976	46,894	Fair
I-5 (hwy 001) over I-5 @ Portland Ave	1954	42,268	Fair
I-5 (hwy 001) over I-5 @ Speedway Rd	1955	41,824	Fair
I-5 (hwy 001) over I-5 @ Mclain Rd	2009	41,701	Fair
I-5 (hwy 001) over Creek	1954	29,858	Fair