No earth/moving or land disturbance activity
shall commence before stormwater management plans for the site have
been reviewed by an engineer with expertise in stormwater management
and are approved by the municipality.
In addition to the plan requirements contained in §§ 195-13, 195-15 and 195-17 of Chapter
195, Subdivision and Land Development, of the Code of the County of Delaware, the following stormwater-related items shall be included as part of the plan submission:
A. Sketch plan contents.
(1) The name of the watershed and the subarea in which
the site is located as well as the appropriate release rate percentage.
(2) Existing ground cover conditions.
(3) Definition of existing drainage paths and drainage
area boundaries.
(4) Definition of existing drainage problems.
(5) Appropriate stormwater management performance standards
as defined in the standards and criteria section of the Ridley Creek
Stormwater Management Plan.
(c)
Downstream impact evaluation.
B. Preliminary plan contents.
(1) Data requirements as set forth for the sketch plan.
(2) Architectural layout of existing and proposed streets,
buildings, approximate building dimensions, parking areas, walkways,
and other impervious areas.
(3) Configuration of the storm and sanitary sewer system
layout.
(4) Approximate location and layout of the stormwater
management system with a description of its proposed design and operation.
(5) Existing and proposed drainage easements.
(6) Preliminary runoff calculations as set forth in the
Ridley Creek Stormwater Management Plan.
(7) Tentative ownership and maintenance provisions for
all stormwater related facilities.
C. Final plan contents.
(1) Data requirements as set forth for the preliminary
plan.
(2) Final layout of existing and proposed streets and
buildings, actual building dimensions, parking areas, and other impervious
areas.
(3) Exact location and layout of the stormwater management
system with a detailed description of its proposed design and operation.
(4) Detailed runoff calculations as set forth in the Ridley
Creek Stormwater Management Plan.
(5) Final ownership and maintenance provisions for all
stormwater-related facilities.
(6) Modifications requested by the municipality during
the preliminary review phase.