A.
The permittee shall conduct a local study of the impact on existing
downstream development and conditions to be caused by proposed upstream
development. This study shall be submitted to the Engineering Division
prior to final plan approval. This study shall include a development
impact statement to the County addressing the following:
(1)
Changes to runoff factors and discharge rates.
(2)
Existing open channel or closed conduit conditions compared to proposed
designs.
(3)
The effect a one-hundred-year floodplain has on existing development
compared to the effect of a one-hundred-year floodplain on proposed
development.
(4)
Changes in downstream hydraulic condition, i.e., velocity, discharge
and floodplain limits.
(5)
The necessity and practicality of stormwater detention for proposed
development within the watershed.
(6)
Stormwater management facilities proposed.
(7)
The danger reach downstream as the result of failure or partial blockage
of water detention and stormwater management facilities.
(8)
The effect that planned upstream development shall have on existing
or proposed downstream development in accordance with the Calvert
County Master Plan and the Calvert County Zoning Ordinance.
(9)
The effect proposed development shall have on downstream property
owners.
(10)
Any other comments as noted by the Engineering Division Chief.
B.
This study is intended to give both the Department of Public Works
and the permittee a thorough insight into the problems that may result
from new development as well as serve as a design guideline for proposed
development.
C.
The Engineering Division Chief may reduce or increase the scope of
this study based on the size, type and scope of the proposed development.
