Page 9 of 12 =4- 10. This Agreement shall oot in any way restrict the raght of the City at any time to widen, raise or lower tne roadway or boulevard abutting or adjoining the Lands, notwithstanding that the effect of such alteration in wadth or elevation or both may be to cender the Works useless for the purposes of the Owner AND in the evant that the City does alter the width or elevation or beth of the said roadway or boulevard, the Owner hereby releases and forever discharges tha City from all manner of claims of any nature whatsoever which may arise by reason of such alteration in width or elevation or both, or by reason of tne discontinuance and removal of the Works as a rasult of such alteration in width or elevation or both. li. The City may at any time in its sole discretion withdraw the rights it has granted herein te the Owner and in the avenct of such withdrawal. for any cause or reason whatscever, the Qwner shall, at his own expensa, within a pariod of six (6) months from the data of receiving such notice of withdrawal or within such short.r time as may be spacified by the City's Council, remove the Works and fill up any excavation made, constructed or maintained with respect to it. and otherwise restore the site to the satisfaction of the City Engineer. 12. In the ewent the Owner fails to keep the Works of any covering or structure pertaining thereto in good and sufficient repair to the satisfaction of the City, or in the event the Owner fails to remove the Works or to fill up any excavation or to rastore the site to the satisfaction of the City =ngineer, che City Engineer may in its sole discretion cause such repairs to be made, including structural changes. as he “deems necassary, oF shall remove the Works or fill in the excavation as the case Gay be, and the Owner shall pay the costs of the repeirs, removal or filling in to the City forthwith. 13. Waiver of any default by either party shall not bs deemed to be a waiver of any subsequent default by that party; whenever it is vequired or desired that «ither party ehail deliver or serve a notice on the other, deliver or service shall be deemed to be satisfactory if and deemed to have occurred when: (a) that party has been served personally, on the date of service: OF mailed by pre-paid registered mail, on ehe date received or on the sixth day after receipt of mailing by any Cenaca post office, whichaver is lier, s@ long as the noticsa is mailed to at che most racent address shown on