e 28 November 2011 and had resulted in decrease of water rise to 1.3 <a href="//en.wikipedia.org/wiki/Meters_above_sea_level" title="Meters above sea level" class="mw-redirect">masl</a>, that is below flood level equal to 1.6 masl,<sup id="cite_ref-glavred_5-0" class="reference"><a href="#cite_note-glavred-5"><span>[</span>5<span>]</span></a></sup> which prevented the 309th flood in the history of the city and saved some 1.3 billion roubles of possible damages.<sup id="cite_ref-fontanka_6-0" class="referenc