Among the points of change negotiated between blasio`s administration and local city councillors Vanessa Gibson and Fernando Cabrera was the creation of the Jerome Avenue Public Health Task Force. East Harlem, also known as Spanish Harlem or El Barrio, is a neighborhood in Upper Manhattan, New York, that roughly covers the area north of the Upper East Side and is bounded to the south by 96th Street, to the west by 5th Avenue and the East River and the Harlem River to the east and north.    Despite its name, it is generally not considered part of Harlem.  The area that became East Harlem was most of the 19th Residential neighborhoods northeast of Third Avenue and East 110th Street had developed in the 1860s.  The construction of the elevated transit line to Harlem in 1879 and 1880 and the construction of the Lexington Avenue subway in 1919, urbanized the area. improving the construction of apartment buildings and brownstones. The extension of cable cars on Lexington Avenue to East Harlem was hampered by the climb of Duffy`s Hill on 103rd Street, one of the steepest slopes in Manhattan. The change of East Harlem spanned about 96 blocks, bounded south of East 104th Street, north of 132nd Street, west by Park Avenue, and east by Second Avenue. The change is expected to create 2,600 housing units on several public sites. .