Green Line Extension to Medford & Union Sq

BeeLine

Moderator
Staff member
Joined
Jan 7, 2012
Messages
11,150
Reaction score
4,663

Charlie_mta

Senior Member
Joined
Jul 15, 2006
Messages
1,602
Reaction score
242
The sunlight passing through the elevated superstructure is great. I hope the design allows for some of it after the ties and tracks go in,
 

Arlington

Moderator
Staff member
Joined
Dec 10, 2011
Messages
4,355
Reaction score
493
The sunlight passing through the elevated superstructure is great. I hope the design allows for some of it after the ties and tracks go in,
Gosh, I'd just assumed the crossties would be set in stone ballast, but then again I was (wrongly) picturing the concrete viaducts in new systems like LA and Norfolk VA
 

F-Line to Dudley

Senior Member
Joined
Nov 2, 2010
Messages
6,080
Reaction score
1,007
Gosh, I'd just assumed the crossties would be set in stone ballast, but then again I was (wrongly) picturing the concrete viaducts in new systems like LA and Norfolk VA
Old Orange Line El had plenty of daylight in spots between the tracks, as it was wood crossties on open deck.
 

Arlington

Moderator
Staff member
Joined
Dec 10, 2011
Messages
4,355
Reaction score
493
Old Orange Line El had plenty of daylight in spots between the tracks, as it was wood crossties on open deck.
Sure, and the Lechmere Viaduct still does (though it is hard to experience from most angles most of the time). Do we actually know they're setting the crossties across the steel beams here?
 

Javier

Active Member
Joined
Oct 13, 2019
Messages
278
Reaction score
771
Ball square bridge and near school street bridge.
I’m surprised how that thin wall can hold all that weight for the berm
61A61ADA-690A-4AE9-B5DD-A6026C73952B.jpeg
EFAA5149-0152-43EA-A8F7-29103D983319.jpeg
41CE3A91-A92E-46DD-8901-26FBEA725B8A.jpeg
BD02DD1D-2BD6-4D80-BD6C-2B76DCF2FB28.jpeg
42FCB706-1A37-470C-80B6-4CE95CF17621.jpeg
5EB41C88-9120-41C3-9F55-5AABA80C5EA8.jpeg
8B42BC63-61F2-43FB-AA85-E84A4D43FE5F.jpeg
E5587F4F-47C4-4B2B-A37E-A492EFB3D8EA.jpeg
C319F3FA-06B9-4792-914E-949A8ABE9058.jpeg
 

Jake_Jarmel

New member
Joined
Jan 7, 2020
Messages
13
Reaction score
10
Sure, and the Lechmere Viaduct still does (though it is hard to experience from most angles most of the time). Do we actually know they're setting the crossties across the steel beams here?
I'm pretty sure the girders will be composite with a cast-in-place deck, then ballasted above.
 

stick n move

Senior Member
Joined
Oct 14, 2009
Messages
6,818
Reaction score
1,144
Am I the only one who loves transit trenches with defined walls and structure like the ol corridor much more than just dirt and bushes and crap? I like the exactness of it, the cleanliness, the uniformity, the separateness... I dont even know why but Im excited to see how quality and prepared this corridor soon looks vs the unkemptness of before.
 

Arlington

Moderator
Staff member
Joined
Dec 10, 2011
Messages
4,355
Reaction score
493
^ agreed: old deteriorating retaining walls, each of I different material, design, and patch-as-you go era, evokes the financial struggles of the old railroads
 

HelloBostonHi

Active Member
Joined
Apr 17, 2018
Messages
674
Reaction score
459
Am I the only one who loves transit trenches with defined walls and structure like the ol corridor much more than just dirt and bushes and crap? I like the exactness of it, the cleanliness, the uniformity, the separateness... I dont even know why but Im excited to see how quality and prepared this corridor soon looks vs the unkemptness of before.
Reminds me distinctly of the Southwest Corridor which Orange Line problems aside is certainly the highest quality bit of Commuter Rail tracl infrastructure in the network
 

ceo

Active Member
Joined
May 4, 2009
Messages
290
Reaction score
120
I wonder why those beams are painted green and the ones further towards Brickbottom aren't. Is it just that it's a high-visibility location so they wanted them to be prettier?
 

F-Line to Dudley

Senior Member
Joined
Nov 2, 2010
Messages
6,080
Reaction score
1,007
I wonder why those beams are painted green and the ones further towards Brickbottom aren't. Is it just that it's a high-visibility location so they wanted them to be prettier?
No...probably just more sensitive work windows when they're painting above roads and sidewalk. That's night work in Lechmere Sq. They can do it 24/7 everywhere else, and use a lull in other schedules to backfill paint chores if they need an excuse on a given day to keep someone busy.
 

Jake_Jarmel

New member
Joined
Jan 7, 2020
Messages
13
Reaction score
10
No...probably just more sensitive work windows when they're painting above roads and sidewalk. That's night work in Lechmere Sq. They can do it 24/7 everywhere else, and use a lull in other schedules to backfill paint chores if they need an excuse on a given day to keep someone busy.
The steel beyond Water Street appears to be weathered, so it won't get painted at any point in time. I'm guessing the beginning of the new viaduct (at Lechmere) had some type of requirement by the MBTA to match the look/feel of the existing viaduct.
 

ceo

Active Member
Joined
May 4, 2009
Messages
290
Reaction score
120
No...probably just more sensitive work windows when they're painting above roads and sidewalk. That's night work in Lechmere Sq. They can do it 24/7 everywhere else, and use a lull in other schedules to backfill paint chores if they need an excuse on a given day to keep someone busy.
Pretty sure the beams were painted long before they arrived on the property. Haven't seen paint equipment anywhere near the site, and I was riding through semi-regularly before the lockdown.
 

Charlie_mta

Senior Member
Joined
Jul 15, 2006
Messages
1,602
Reaction score
242
Ball square bridge and near school street bridge.
I’m surprised how that thin wall can hold all that weight for the berm
There is probably an earth reinforced wall built behind the thin facia wall. Horizontal layers of geofabric separated by select material go a ways back into the soil behind the facia wall. I've deigned similar structures myself. They're very commonly used.
 

Tango

Active Member
Joined
Dec 8, 2008
Messages
168
Reaction score
4
Pretty sure the beams were painted long before they arrived on the property. Haven't seen paint equipment anywhere near the site, and I was riding through semi-regularly before the lockdown.
The green beams arrived already painted. They had them sitting at the site weeks before being hoisted onto the concrete supports.
 

Top