NYCkayaker How about filling in the Harlem River?

[mike]

I just came across this, the greenway area west of the Amtrak tracks in
riverside park, is all landfill.  The Amtrak tracks are the tracks that go
underground just south of the Inwood canoe club, that were abandoned for
many years and reactivated in the last twenty years.
West 72nd Street to 155th Street. 
http://www.nycgovparks.org/sub_newsroom/press_releases/press_releases.php?id
=19959
In 1875, Frederick Law Olmsted completed a schematic design for Riverside
Park and the first sections of the park opened five years later. In 1935,
Department of Parks landscape architect Gilmore Clarke designed the area of
Riverside Park to the west of the newly constructed Henry Hudson Parkway.
His design, completed under the supervision of Parks Commissioner Robert
Moses, created an area of landfill to the west of the New York Central
Railroad line, beyond the Olmsted-era footprint of Riverside Park. This
extension provided an area adjacent to the water for active recreation
extending West 72nd Street to 155th Street along the Hudson River. In 1937 a
waterfront esplanade, lined with multi-stem crab apple trees, was created
from West 72nd Street to 83rd Street. North of that point the Henry Hudson
Parkway swept down to the waters edge, giving drivers views of Manhattan to
the south or the New Jersey Palisades to the north..