Portland police say a man fell to his death from the Vista Bridge just weeks before the span is to get temporary barriers to prevent suicide.
Sgt. Pete Simpson says officers responded to the scene less than hour before sunrise Tuesday.
The Oregon State Medical Examiner will try to identify the man. He is the fourth person this year to die at the span known as "The Suicide Bridge."
In response to the deaths, the city last week announced plans to install temporary, anti-suicide screens. Portland Bureau of Transportation spokeswoman Diane Dulken says they should be in place by the end of the month.
Estimates are it would cost $2.5 million for a permanent barrier that's architecturally appropriate to the structure listed on the National Register of Historic Places.