Relief/Ontario Line - Challenges

Nov. 2, 2019

"There is no space over, so it will have to be under - I now have an engineer ensuring me that it's not much of a challenge - He says the sewer is at a relatively shallow depth and that the Ontario Line isn't planned to come up above until just before the platform at Exhibition Station, and that there is plenty of horizontal and vertical distance"

Phil Prentice in response to Justin Gobel on Facebook - Nov 219
Nov. 2, 2019

"Brian Freiter Phil Prentice - Civil engineer here - it's really no challenge at all. The sewer is at a relatively shallow depth, and the Ontario Line isn't planned to come up above until just before the platform at Exhibition Station - there is plenty of horizontal and vertical distance."

Thanks for clearing that up - The sewers are a combination of concrete and brick construction - What are the risks of the integrity of the sewers being affected or damaged?"

Phil Prentice in response to Seth McDermott on Facebook - Nov 2'19
Nov. 2, 2019

"It will be tight, if not impossible - The plan calls for the Ontario Line to go from underground at King-Bathurst to at grade at Exhibition GO over a short distance with these sewers in between - The sewers are at least 8' high; they are between 5 and 20' below grade; the tunnel will be almost 28' in diameter; there is less than 500m between Bathurst and the heavy-rail Y and main sewer at Ordinance Park, and 1 km between the "Relief" tunnel and Exhibition GO Station; they cannot tunnel through the sewers; they cannot go over them unless they remove Fort York - The absolute best case scenario, if the stars align and the rise is only 50', is a 2% grade over the 1km - I still think they are going to have to scrap the above grade segment and have it all underground"

Phil Prentice in response to Brian Freiter on Facebook - Nov 2'19
Nov. 2, 2019

"The problem at Exhibition Place is unique - The plan calls for the Ontario Line to go from underground at King-Bathurst to at grade at Exhibition GO over a short distance with these sewers in between - I don't care how good their Engineers are; the sewers are at least 8' high; they are between 5 and 20' below grade; the tunnel will be almost 28' in diameter; there is less than 1 km between the "Relief" tunnel and Exhibition GO Station; and they cannot tunnel through the sewers - So; the only options I can see are to pump the sewage over the tunnel; or scrap the above grade segment, and have it all underground"

Phil Prentice in response to Justin Gobel on Facebook - Nov 2'19