on Sun Jan 13 20:21:31 2019, in response to Re: Put-Ins/Pull Outs, posted by MainR3664 on Sun Jan 13 17:37:25 2019.
Actually as originally intended, those tracks were supposed to go through as the Bway exp tks. They would dip down to the lower level at C/Hall and ramp up at the S/E and continue to Cortland St and the Montague tunnel. The upper level was to be a stub terminal with a diamond Xover at the N/E. The lower level at Canal was supposed to continue across town to West St. What ended up happening was that the Manny B tracks were finished before the tunnel was completed so a “temporary" ramp was built to bring the Manny B tks up to the Bway subway to get service from Bkln into Manhattan. When the tunnel and the lower portion of the Bway subway was completed rather than revert to the original plans, it was decided to ramp the upper level down to the present configuration and use the lower level as either a stub terminal of for storage which is what it is used for today. If yo can ever get down to the lower level on a fan trip for example, you can stand at the S/E of one of the lower level platforms and see where the original trackbed rises to meet the upper level. If the lower level had been built through, the middle tk would have been used to turn back trains much as the middle at Whitehall is today. Depending on the desired service pattern, trains coming from either Bkln or uptown could be shortlined there.