The lake reached long and over in depth by the first week of June 2010 when it began flowing over the landslide dam , completely submerging lower Shishkat and partly flooding Gulmit .
By the first week of June 2010 , the new lake was 13 mi long and over 100 m deep . At that time , it flowed over the landslide dam , completely submerging lower Shishkat and partly flooding Gulmit .