After several tons of asphalt has been removed from the lake, the hole that was formed shrinks and disappears within a few weeks. This gives the impression that the lake replenishes itself.
Kad kādā vietā no ezera ir izvestas vairākas tonnas asfalta, palikusī bedre dažu nedēļu laikā aizvelkas un pazūd, radot iespaidu, ka asfalta krājumi ezerā papildinās.