Soo Line and Shorham Hill

[WisconsinCentral]

Hello,

Could somebody please let me know the following-
1 When did the Soo first build tracks into the Twin Cities?
2 When was Shoreham Yard built?
3 When was Shoreham Hill double tracked?
4 When was the Highline constructed?

Thanks!
WisconsinCentral,
New Brighton, MN