From the February 28, 1891 edition of the Silverton Standard:
IDAHO SLIDE TAKES OUT TELEGRAPH POLE, BURIES THE Y.
The Idaho slide came down on Monday night and ran bacross the park to a level with Blair street. It took out one telegraph pole and covered up the Y with about ten feet of snow, This is the furthest it has run since 1879.
A man and a four horse team and wagon were covered up by a…