Development shall be laid out to provide proper drainage of the area, including facilities
such as curb and gutter, catch basins, canals, culverts, bridges, natural waterways,
and stormwater best management practices (BMPs). Drainage improvements shall accommodate
potential runoff from the entire upstream drainage area and shall be designed to reduce
or prevent increases in downstream flooding. Stormwater drainage systems shall be
separate and independent of any sanitary sewer system whether public or private. The
parish shall require the use of control methods such as retention or detention, and/or
the construction of off-site drainage improvements to mitigate the impacts of the
proposed development to achieve these purposes.
