A.
Storm drainage systems shall be designed by a licensed
professional engineer using prudent methods and the most recent information
available.
C.
Extensive consideration shall be given to retention
and detention features in design, and, whenever possible, the outfall
of the system shall be in the same basin as the system.
A.
Storm drainage systems shall be designed to handle
any future development of the basin in which it is situated. A culvert
or other drainage facility shall, in each case, be large enough to
accommodate potential runoff from its entire upstream drainage area,
whether inside or outside the subdivision. The Subdivision Administrator
shall review the design and size of the facility based on anticipated
runoff from a ten-year storm under conditions of total potential development
permitted by watershed.
B.
The subdivider's engineer shall also study the effect
of subdivision on the existing downstream drainage facilities outside
the area of the subdivision. This study shall be reviewed by the Subdivision
Administrator. Where it is anticipated that the additional runoff
incident to the development of the subdivision will overload an existing
downstream drainage facility during a five-year storm, the Planning
Board shall notify the Town Board of such potential condition. In
such case, the Planning Board shall not approve the subdivision until
provision has been made for the improvement of said condition.
All pipes shall be sized in accordance with
proven engineering practice to handle expected flows, both present
and future.
Pipe strength shall be sufficient enough to
carry all expected loads and with a minimum loading of H-20.
Storm sewer design is subject to review and
recommendation by the Subdivision Administrator before approval.
