however, towards completing a plan, had been made, under the direction of Major Douglas but it was found necessary to go over the whole ground again, in order to arrive ;

at a result satisfactory to the present chief engineer and an earlier attention to the subject ;

was prevented by the pressing necessity of preparing the first and second divisions of the aqueduct for contract, and also the great care required in a work of such magnitude and

CROTON AaUEDUCT. 153

importance, that the first portions of the project should be well and permanently executed, as a guide and example for the future. The result of these examinations carries the aqueduct from the Harlem River to the receiving reservoir as follows it commences on the New York side of the river, at the :

effluent pipe chamber, on land belonging, or lately belonging, to the estate of Stephen Jumel, where a tunnel of 200 feet is contemplated. It then takes a southerly course, crossing the land of Mr. Watkins then runs westerly on the land of Carman and Con- ;

nor, and enters the 10th avenue at 151st street, where a tunnel, averaging 45 feet below the surface, must be made from 140th to 135th street inclusive. The line then continues in the 10th avenue to 107th street, and makes a curve easterly to 104th street, and from thence runs parallel with, and 125 feet from, the northerly line of the 9th avenue to 90th street, where another curve occurs, carrying the line to 85th street, where it enters the receiving reservoir. From this reservoir it is proposed to conduct the water, through the 5th avenue, to the distributing reservoir on Murray Hill, by iron pipes. In following the line of aqueduct as above described, its grade will, in several places, be above the present surface of the ground, and from 102d to 95th street inclusive, in order to accommodate the carriageway and sidewalks, archways must be erected over the streets, and the aqueduct carried on a stone embankment of from 33 to 48 feet in height ;