II. THE NEW POST-OFFICE.
In 1869, the General Government decided to depart from the niggardly policy it had hitherto pursued towards the City of New York, and to take steps toward the erection of a Post-office adequate to the needs of the great and growing community which demanded this act of justice at its hands. It was decided to erect an edifice which should be an ornament to the city, and capable of accommodating the City Postal service for generations to come. The Municipal Authorities, in order to secure the erection of the building in the most convenient part of the city, offered to sell to the General Government the lower end of the City Hall Park. The offer was accepted, and the land was purchased by the Government. The corner stone was laid in June, 1869. At the present writing (January, 1872,) the first story has been finished. It will probably require several years to complete the edifice. The price paid for the land was $500,000, a merely nominal sum. It is expected that the building will cost about $4,000,000.
“The exterior walls are to be of Dix Island granite, and the dimensions of the four fronts are severally as follows: the northerly side (toward the City Hall) is about 300 feet; the Broadway and Park Row fronts, respectively, 270 feet; and the southerly part, 130 feet.
“The difficulty of laying the foundations may be judged from the following facts: The depth of excavation over the entire plot was over thirty feet, and the material to be removed was entirely loose sand, while the traffic in Broadway and Park Row, including railroad cars and omnibuses, was enormous, involving the danger of a caving-in of both streets! The trenches
in which the retaining walls and pier foundations were to be laid had to be completely incased in sheet-piling, shored across with timbers, under the protection of which the excavation was carried on and the masonry laid. The excavation was done mostly at night, the ground being illuminated by magnesium light. The outer walls, and those of the court, and the foundations of the interior columns are based on huge granite blocks, the granite being laid on massive beds of concrete. One hundred and fifty-nine iron columns in the basement, and 117 in the first story, support the walls and floors. The piers of the cellar are of granite, or arcaded brick and iron; the stairs are of stone and iron; the chimneys, of stone; the roof and its ornaments, of iron, covered with slate and copper. Four large low-pressure boilers supply the steam for heating the entire building. The roofs of the corner pavilions rise 107 feet above the sidewalk. The cellar is a little more than seven feet in the clear; the basement, sixteen feet; the first corridor, fourteen feet; and the half-story above it—both completing the first story—also fourteen feet. The entire circuit of the building is over one-fifth of a mile.
“The style of architecture is the classical Italian Renaissance, with some modifications to harmonize with the treatment of the roofs, which are to be French, as best suited to such architecture on a large scale. The Mansard roof will be covered with an ironclad cornice and metallic cresting.
“The irregular angles imposed by the shape of the lot are marked by semi-hexagonal pavilions. The main building line is withdrawn from the lower, or southerly front, to extend the façade on that side. The roof, square-domed, rests on three arms of a Greek cross, out of the centre of which rises a heavily buttressed cupola, carrying projecting pediments, with detached columns on its four faces. The foot of the flagstaff, which is to surmount the cupola, will be 160 feet above the sidewalk.
“The fronts on Broadway and Park Row, respectively, are broken by square central pavilions, with pyramidal roofs, of which the first and second stories are faced with detached colonnades of coupled columns. Below are the main lateral entrances
to the Post-office corridor. The centre of the largest and northerly front is relieved by a broad pavilion with a two-story colonnade, roofed with a dome, the balustrade of which is 150 feet above the sidewalk. The dome is lighted by a range of round windows, and surmounted by an attic, ornamented by a sculptured pediment and a crown with the national arms. The form of the building is, substantially, a trapezoid, with an open triangular court in the centre, below the main story; it includes a sub-basement, basement, three stories in the walls, and a roof story.