That the permanent grade of the several streets and avenues, adjacent to the line of the aqueduct, ought, as far as practicable, to be made to conform to such line, the Commissioners think must be admitted ; and they trust, therefore, that the whole subject may be specially referred to a Joint Committee of both Boards and the Street Commissioner, with authority to take measures for opening and fixing the grade of such streets and avenues through which the water is to pass, and to adopt such modification of the plan, on the island of New York, as shall seem most conducive to the end in view and the Commis- ;

sioners and chief engineer promise to co-operate with such committee, and to lend them all the assistance in their power.

The estimate for erecting the receiving reservoir, to have a depth of 20 to 25 feet of water, and to contain 158,000,000 of gallons, is - - $310,500, 00 The distributing reservoir of Murray Hill, will have an average elevation of about 31 feet above the natural surface, and 40 feet above the established grade, and will be 420 feet square. The estimated cost is - 295,340 00

The total cost of the reservoirs, - - $605,840 00 The cost of the four divisions of the aqueduct, commencing at the Croton Reservoir, and ending at the Receiving Reservoir, including the crossing at the Harlem River, and the Manhattan Valley, by pipes, amounts to 6,189,000 00 -

And for the connecting pipes, between the receiving and distributing reservoirs, 499,110 00 Add for contingencies and superintendence, eight per cent, - 583,516 00