Sewers, drains and ditches. Preliminary plans
and profiles, at a scale of not more than one inch equals 50 feet,
of all proposed and existing sanitary sewers, storm drains, drainage
ditches and streams within the subdivision, together with the locations,
sizes, elevations, grades and capacities of an existing sanitary sewer,
storm drain, drainage ditch or stream or watercourse to which the
proposed facility shall be connected. When brook or stream channel
improvements are proposed or required, the plans for such improvement
shall be approved by the New Jersey State Department of Environmental
Protection.