The NWPA is designed to protect the navigable waters of Canada by prohibiting, without the approval of the Minister of Transport, the building or placement of any works that may substantially interfere with navigation. ###>La LPEN est conçue afin de protéger les eaux navigables du Canada en interdisant, sans l'approbation du ministre des Transports, la construction ou le placement d'ouvrages qui pourraient nuire sérieusement à la navigation.