JPC has completed the wingwalls for the outfall at Dobson’s Run in East Falls. Another company, Jaydee Contractors of Michigan is constructing the drainage tunnel from Scotts Lane down Allegheny Ave. and under Laurel Hill Cemetery to the outfall below the ex-Reading Railroad bridges at East Falls. Apparently, early projections that the tunneling through mica schist would be slow going have proven false. Down at the Schuylkill, to build the forms for the concrete walls below river level, the Blackwood, NJ-based general contractor had go above and beyond the normal sheetpile coffer dam and build an earthen dam reinforced with vertical steel piles. A series of pumps keep the work area relatively dry though the foreman on the site remarked that during heavy flow, the work area is allowed to flood and then water is pumped out.
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The Necessity for Ruins 
Please see comment below.
“Apparently, early projections that the tunneling through mica schist would be slow going have proven false.”
The tunneling did not start yet.
I’d love to see another updated post on this since the TBM was in place on Kelly as of this morning.
Yeah, I saw that the tunnel borer was in place over the weekend. It seems like the outfall was the easy part of the process.