“In 1902 Scrooge McDuck tried to drive his car to the top of the hill, but that effort was too much for the car”s motor and it stopped.
Immediately after that incident Humperdink Duck renamed the hill and gave it its present name.
During a period of six months the same year Scrooge raised his Money Bin on the hill.”

“The most recent informations provided from Don Rosa… is that Scrooge McDuck died in 1967 100 years old.

How are Huey, Dewey, and Louie related to Donald?
An answer from the Disney Comics Characters pages:
“One day Donald gets a letter with the following text:

“Dear Donald, I am sending your angel nephews Louie, Huey and Dewey, to stay with you while their father is in the hospital.
A giant firecracker exploded under his chair.”

These and more (surprising) informations in Who’s who in Duckburg, a guide to the most frequently used characters in Barks’ and Rosa’s works.
See also: The lives and times in Duckburg.