We were not able to make any arrangement with the contractors for the receiving reservoir at Yorkville, by which we could abandon, for the present, the construction of the northern division of this work, as proposed by us, with any advantage to the public so ;

much work having been already executed, and so much of the earth being required for the embankments of the streets surrounding the reservoir and the southern division, that we were obliged to let this reservoir proceed, as contemplated by our predecessors except, ;

that we do not excavate the rock, as was previously intended, by which there is a saving, as estimated, of 75,000 dollars. We have added to the expense of the distributing reservoir about $9,000, in consequence of having adopted a different finish from that contemplated by our predecessors. With the exceptions above stated, and the abandonment of the three arched bridges at Clendening Valley, the work has in all other respects been progressing agreeably to the plans of our predecessors in office.

The project of dispensing with some of the arches over Clendening Valley, was approved by the Common Council, but vetoed by the Mayor, Mr. Varian, on the ground that it would close streets, which, according to the map of the city, were at some future period to be opened in the direction of the arches to be dispensed with. The Commissioners, in the report under consideration, examine at length and in detail, the objections of the Mayor, which they thought might all be obviated even admitting, which they do not, that the lines traced on the map of the city as future streets, thereby became in law and fact streets,