A.
The minimum control requirements established in this
section and the Design Manual are as follows:
(1)
The recharge volume, water quality volume, and overbank
flood protection volume for the two-year frequency storm event shall be used
to design BMP's according to the Design Manual; and
(2)
The Town may require more than the minimum control requirements
specified in this chapter if hydrologic or topographic conditions warrant
or if flooding, stream channel erosion, or water quality problems exist downstream
from a proposed project.
B.
Stormwater management and development plans, where applicable,
shall be consistent with adopted and approved watershed management plans or
flood management plans as approved by the Maryland Department of the Environment
in accordance with the Flood Hazard Management Act of 1976.
The structural and nonstructural stormwater management measures established
in this chapter shall be used, either alone or in a combination, in developing
a stormwater management plan.
A.
Structural stormwater management measures.
(1)
The following structural stormwater management practices shall be designed according to the Design Manual to satisfy the applicable minimum control requirements established in § 154-9 of this chapter.
(2)
The performance criteria specified in the Design Manual
with regard to general feasibility, conveyance, pretreatment, treatment and
geometry, environment and landscaping, and maintenance shall be considered
when selecting structural stormwater management practices.
(3)
Structural stormwater management practices shall be selected
to accommodate the unique hydrologic or geologic regions of the state.
B.
Nonstructural stormwater management measures.
(1)
The following nonstructural stormwater management practices
shall be applied according to the Design Manual to minimize increases in new
development runoff:
(2)
The use of nonstructural stormwater management practices
shall be encouraged to minimize the reliance on structural BMP's.
(3)
The minimum control requirements listed in § 154-9 of this chapter may be reduced when nonstructural stormwater management practices are incorporated into site designs according to the Design Manual.
(4)
The use of nonstructural stormwater management practices
may not conflict with existing state or local laws, ordinances, regulations,
or policies.
(5)
Nonstructural stormwater management practices used to
reduce the minimum control requirements must be recorded in the land records
of Caroline County and remain unaltered by subsequent property owners. Prior
approval from the Town Engineer shall be obtained before nonstructural stormwater
practices are altered.
[Amended 7-14-2003 by Ord. No. 247]
C.
Alternative structural and nonstructural stormwater management
practices may be used for new development water quality control if they meet
the performance criteria established in the Design Manual and are approved
by the Administration. Practices used for redevelopment projects shall be
approved by the Town Engineer.
[Amended 7-14-2003 by Ord. No. 247]
D.
For the purposes of modifying the minimum control requirements
or design criteria, the owner/developer shall submit to the Town Engineer
an analysis of the impacts of stormwater flows downstream in the watershed.
The analysis shall include hydrologic and hydraulic calculations necessary
to determine the impact of hydrograph timing modifications of the proposed
development upon a dam, highway, structure, or natural point of restricted
streamflow. The point of investigation is to be established with the concurrence
of the Town Engineer, downstream of the first downstream tributary whose drainage
area equals or exceeds the contributing area to the project or stormwater
management facility.
The basic design criteria, methodologies, and construction specifications,
subject to the approval of the Commissioners of Ridgely and the WMA, shall
be those of the Design Manual.
