The foundations of five of the river-piers, Nos. 7, 8, 9, 10 and 11, are also completed, and the stone work of the first four has been carried to the the last, No. 11, is nearly ready to receive the masonheight of forty feet or more, and ry. The work upon the two remaining foundations, Nos. 12 and 13, is in progress. The excavation for No. 12 is completed, and a large part of the bearing piles are driven. The contractors have recently erected another steam engine for the purpose of pumping

198 MEMOIR OF THE and hoisting out the earth excavated in No. 13. The precise character of the foundation for this pier has not yet been very satisfactorily ascertained. The indications at present are, that it will be found similar Nos. 10, 11 and 12, and require piling in the to that of

same manner. The coffer dams, used for putting down these foundations, have been found to answer their intended purpose very perfectly. No accident has thus far attended their use, and they have been kept free of water with less difficulty than could reasonably have been expected." The whole amount expended on the works up to 20 January, is stated by the Commissioners at seven millions nine hundred and ten thousand four hundred and seventysix dollars, to which a further amount of $662,540, required for work unfinished and contracts unsettled, would be added. Both these sums, however, are exclusive of the pipes laid from the distributing reservoir, that head of expenditure being under the charge of the Corporation.