GLX Impact on NH Route (Lowell Line)

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Re: GLX Impact on NH Route (Lowell Line)

Postby Arlington » Tue May 01, 2018 3:49 pm

^ Congratulations to all involved!

Why does the work at the switch to Washington St / Cobble Hill bypass track (Yard 10 lead?) Seem to be on such an irregular schedule (big machines alongside deep trench, sitting idle for weeklong stretches)?
"Trying to solve congestion by making roadways wider is like trying to solve obesity by buying bigger pants."--Charles Marohn
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Re: GLX Impact on NH Route (Lowell Line)

Postby Arlington » Thu May 10, 2018 4:32 pm

How old are the "concrete Lincoln logs" stacked retaining walls alongside the LL in Somerville. As construction disturbs the trashy slopes, the stacked retaining walls are looking a little too lacy and delicate. What's the plan?
"Trying to solve congestion by making roadways wider is like trying to solve obesity by buying bigger pants."--Charles Marohn
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Re: GLX Impact on NH Route (Lowell Line)

Postby Arlington » Wed Sep 12, 2018 5:47 pm

They seem to be piling dirt or ballast against the tallest & worst "Lincoln logs" concrete retaining walls, on the future GLX side of the Lowell rightof was. Huge piles of ballast in fact.

All the ballast seems to be for widening the foundation of the four track right of way.

incidentally is this upcoming track-move work actually going to be on the Fitchburg line?

Track Shift
Target Start: September 2018
Duration: Sept. 29-30 & Oct. 6-7
Areas impacted in next two weeks: Night work (9 p.m. to 5 a.m.) will begin Sept. 4 and last for two weeks between Medford St. and Lowell St. This work includes excavation in areas along the west side of the alignment, grading and hauling material to and from the work zone
Purpose of Work: Provide GLX Project construction workers with maximum amount of space to safely work on the east side of the rail alignment.

I ask because the Lowell line seems to be scheduled for closures anyway over the next few months which were originally scheduled just for PTC work.
Last edited by Arlington on Wed Sep 12, 2018 9:16 pm, edited 1 time in total.
"Trying to solve congestion by making roadways wider is like trying to solve obesity by buying bigger pants."--Charles Marohn
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Re: GLX Impact on NH Route (Lowell Line)

Postby Trinnau » Wed Sep 12, 2018 7:28 pm

PTC and GLX both working Lowell Line at the same time.
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Re: GLX Impact on NH Route (Lowell Line)

Postby kwf » Tue Sep 18, 2018 2:05 pm

CWR and markings for tie placement are on the ground around the area of Somerville Jct station. A drain pipe on the east side of Central St has been causing constant problems with the grading work...
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Re: GLX Impact on NH Route (Lowell Line)

Postby Arlington » Thu Sep 20, 2018 3:05 pm

The new track now being laid is on the WEST side of the CRs...that'd put it on the future light rail side, roughly in the "slot" that the GLX OUTBOUND will occupy in the future.

So, as I understand it, they moving CR (temporarily) WEST to create space for crews to work on the EAST...presumably on the CR-side on stuff like
- any current east obstructions (like eastside bridge abutments or old platform curbs at Gilman), that would block the final CR Outbound alignment
- the future east retaining structures closest to the final CR Outbound alignment
- the turnout that will connect to the Freight bypass that's been laid near Washington St

With CR operating on the two "center slots" out of the Final 4 (CR Outbound operating on the future CR Inbound, and CR Inbound operating on the future GLX Outbound), will they temporarily pull up the current western track? Or can it be left there? (I'd guess they'd take it out, since they probably want to re-lay drainage pipes and rebuild the whole foundation)

Presumably we go for a while with the CR operating "down the middle" (or even slightly west-of-middle?) while its future-final alignment is cleared, retained, drained, and graded, and then CR gets put in its final eastern location so that GLX construction can start in earnest on the WEST side.

And during the GLX-side (Eastern) construction phase, they'll have the option of single-track operations on the CR Outbound (western most) track if they need an extra margin of safety for crews working on stuff in the GLX's two-track east-side ROW.
"Trying to solve congestion by making roadways wider is like trying to solve obesity by buying bigger pants."--Charles Marohn
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