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Re: Tuscarora Almanac for October 10

Posted by gbs on Mon Oct 11 01:48:52 2021, in response to Tuscarora Almanac for October 10, posted by IRTRedbirdR33 on Sun Oct 10 17:12:18 2021.

New stations on the IRT Eastern Parkway Line are opened at Bergen Street, Grand Army Plaza and Eastern Parkway - Brooklyn Museum.

The construction of this IRT line, especially the section under Flatbush Av, is so interesting, because it was done in conjunction with the building of the BMT Brighton Line under Flatbush Av. From Atlantic Av to Grand Army Plaza there are six tracks under Flatbush Av, at various levels in various configurations.

At the Atlantic Av station, the four IRT tracks are on one level just below Flatbush Av, with a center platform separating the express tracks, while the two BMT tracks are very deep below St Felix St and the terminal. Leaving that station heading south the BMT tracks veer to the left to go under Flatbush Av and start rising, while the IRT express tracks get further apart, to create the space for the BMT tracks to eventually poke through.

At Bergen St (2,3) the IRT local tracks stay close to the street (though leveling off to make a horizontal platform) while the IRT express tracks rise more slowly, in preparation for going deep. The BMT tracks are still between the IRT express tracks and are still rising.

At 7 Av (B,Q) the IRT express tracks are now under the BMT tracks, while the IRT local tracks start out level with the BMT and are behind the station walls. Halfway through the station the BMT tracks start to dip, while the IRT local tracks continue to rise just below the street.

At Grand Army Plaza (2,3) the IRT local tracks are on the upper level, the BMT tracks are below, and the IRT express tracks are further below. Past this station the IRT tracks will turn east and run under Eastern Pkwy, with the express tracks under the local tracks until Franklin Av (2,3,4,5), while the BMT tracks will continue south under Flatbush Av.

All the while Flatbush Av itself is rising up the slope to the top of the terminal moraine in Prospect Park.


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