Nine million dollars was spent in 2008-2009 on upgrading the pump house and reservoir for infrastructure security and preventing water contamination , but the security features have proven to be ineffective and easily infiltrated . The city of Montreal has subsequently attempted to close the park in 2009 and restrict access to the public , citing escalating terrorist threats from the September 11 attacks as the rationale for the non-publicly consulted decision . The park remains accessible as of September 2012
September 11 attacks
September 11 attacks
McTavish reservoir