Storm sewers, culverts, endwalls, inlets and related installations
and improvements shall be provided in order to:
A. Permit unimpeded flow of natural watercourses;
B. Ensure adequate drainage of all streets including all low points;
C. Intercept stormwater runoff along streets at intervals related to
the extent and grade of the area drained;
D. Provide positive drainage away from on-site sewage disposal facilities
and buildings;
E. Accommodate runoff so that there shall be no increase in rate of
stormwater peak discharge leaving the development site after construction,
except as allowed by this part;
F. Ensure adequate drainage at intersections of driveways with streets;
G. Provide that where existing storm sewers are reasonably accessible
and of adequate capacity, subdivisions and land developments shall
connect to the existing storm sewers;
H. Provide that when no existing storm sewer is accessible and of adequate
capacity, stormwater shall discharge to an existing watercourse with
defined bed and barriers. Runoff shall not be increased or concentrated
onto adjacent properties, nor the velocity of flow increased beyond
that existing prior to subdivision or land development unless written
approval is given by the adjacent property owners for the proposed
discharge of surface runoff and the written agreements are approved
by the Township;
I. Provide that when storm drainage will be directed into an adjacent
municipality, all provisions for accommodating such storm drainage
shall be submitted to the governing body of that municipality for
review.