Whenever the Director has reasonable grounds to believe that debris placed or deposited on the banks of any navigable water is liable to be washed into such navigable water by any cause whatsoever and thereby be or become a source of drift likely to hinder, impede or otherwise obstruct navigation, or the condition of any wharf, pier, dolphin, boom, weir, breakwater, bulkhead, jetty or other structure on or bordering on the shores of any navigable water is so dilapidated and deteriorated as to be or become a source of drift or debris liable to be washed into such navigable waters by any cause whatsoever and thereby likely to hinder, impede or otherwise obstruct navigation, the Director may declare the same to be a public nuisance and thereupon order that the same be removed, abated, altered or repaired as such order may specify.