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Old 12-04-2018, 02:16 PM   #261
tangent
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Re: Blue Line extension to Lynn

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Originally Posted by Beton Brut View Post
At the last Suffolk Downs redevelopment meeting, HYM also discussed this resilience priority for the section of track between Suffolk Downs Station and Beachmont Station. They're suggesting a systems of berms topped with a bike path along this stretch of Bennington Street. I see greater value in implementing a flood-gate system at the Winthrop Bridge, and a more robust seawall along Short Beach. This solution would create additional benefit to the T by protecting the Blue Line Shops at Orient Heights from a storm event.
Start planning to raise the roads and rails 2 to 3 feet to keep up with sea level rise. Higher seawalls, berms and whatnot are ok, but you don't want to have a high perimeter storm defense and leave your critical infrastructure below sea level which will just accelerate flooding when it inevitably gets breached... like New Orleans.
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Old 12-05-2018, 07:21 AM   #262
F-Line to Dudley
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Re: Blue Line extension to Lynn

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Originally Posted by tangent View Post
Start planning to raise the roads and rails 2 to 3 feet to keep up with sea level rise. Higher seawalls, berms and whatnot are ok, but you don't want to have a high perimeter storm defense and leave your critical infrastructure below sea level which will just accelerate flooding when it inevitably gets breached... like New Orleans.
In this case if BLX rides alongside the Eastern Route they will have to widen the causeway, which probably means it gets raised +3 feet in-tandem since they'll be dumping lots of stone and EIS'ing for the widening. The last 1500+ ft. of causeway (next to the ex- Revere landfill) will get inclined higher than that any which way so Saugus Draw can be replaced by a taller fixed bridge capable of handling CR + BLX (any routing, including Point of Pines) side-by-side.
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Old 12-05-2018, 09:03 AM   #263
DominusNovus
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Re: Blue Line extension to Lynn

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Originally Posted by tangent View Post
Start planning to raise the roads and rails 2 to 3 feet to keep up with sea level rise. Higher seawalls, berms and whatnot are ok, but you don't want to have a high perimeter storm defense and leave your critical infrastructure below sea level which will just accelerate flooding when it inevitably gets breached... like New Orleans.
Netherlands?
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Old 12-05-2018, 11:51 AM   #264
tangent
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Re: Blue Line extension to Lynn

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Netherlands?


Just saying I would rather have train tracks on top of raised embankment than below one. Either way you need to raise up the land or build a wall up to prevent the tracks from being inundated by sea level rise, but if you simply build a wall around critical infrastructure and leave the infrastructure below sea level then you are leaving yourself a larger risk of catastrophic failure.
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