Alteration and discontinuance of drain.

The Commissioner may enlarge, after the course of, lessen, arch over or otherwise improve any municipal drain, and may discontinue, close up or destroy any such drain which has, in his opinion, become useless or unnecessary or prohibit the use of any such drain either entirely or for the purpose of foul water drainage or for the purpose of surface drainage: Provided that, if by reason of anything done under this section any person is de­prived of the lawful use of any drain, the Commissioner shall, as soon as may be, provide for his use some other drain as effectual as the one which has been discontinued, closed up or destroyed or the use of which has been prohibited. (2) For the purpose of flushing, cleansing, and emptying the said drains, the Commissioner may construct or set up such reservoirs, sluices, engines and other works, as he shall from time to time deem necessary. Drains of Private Streets and Drainage of Premises.