You can't see it in that picture, but there are about ten of them, regularly spaced, running from just before the Cross St. bridge to the point where the commuter rail tracks bend away to the left. The placement suggests pylon foundations.I think that’s a drainage junction and not a pylon foundation.
Maybe...but those are cartoonishly thick bases for hanging a pole. That base is as wide as a manhole cover; they don't even pour 'em half that big for the humongous overhead gantries outside South Station.You can't see it in that picture, but there are about ten of them, regularly spaced, running from just before the Cross St. bridge to the point where the commuter rail tracks bend away to the left. The placement suggests pylon foundations.
I think your estimate for scale from Google maps is not good, I think those concrete bases are bigger than you think. At least manhole cover sized. The track gauge is 4 ft 8 1⁄2 in, and the concrete bases are roughly length-scale as the track gauge.
That's a precast drain manhole. Standard 10" slab top. Lift up the plywood and you'll see the opening for the casting to be installed on top.
Or that was at least one possible interpretation of "Elevated steel and concrete structure between Gilmore Bridge and Lechmere Station to be removed, relocated, and reconstructed."Those are supposed remain and be restored!
If they remain in place, they won't be load bearing. It does look like they're going to stay put as decoration; they truly are the last steel elevated bents in Boston now that the Northern Avenue Bridge has come down.I don't think those old el columns would meet today's seismic requirements.
Yeah, those are monitoring wells. The surrounding area shouldn't be caving in, unless the well shafts are cracked.I called the GLX community hotline. Do you think these are theirs?
About 9 "inspection wells" (?) were cut into the pavement on Boston Ave at Tufts Garage.
Their Dig Safe markings run from UMP-17-01 through UMP-17-09.
Nearly all have their pavement patches caving in
Many now have loose covers, like this:
View attachment 6560View attachment 6561
My guess is that they're somehow for inspecting ground water or subsidence or some other utility thing. But the subsidence was bad enough, but now that the covers are loose, they're going to get flung and kill somebody.
(emphasis mine)We checked in with our GLX-C engineer who oversees our utility work. He said “UMP” stands for Utility Monitoring Point and advised that you give Eversource as call as it is not related to GLX work. Thanks for checking in to see if it is related to GLX construction. I imagine Eversource might be a bit busy after the storm yesterday perhaps Medford’s SeeClickFix can serve offer a temporary solution until Eversource is able to get out to address the problem."