A.Â
For any proposed development, the owner/developer shall submit phased stormwater management plans to the Wicomico County Department of Public Works for review and approval. At a minimum, plans shall be submitted for the concept, site development, and final stormwater management construction phases of project design. Each plan submittal shall include the minimum content specified in § 196-14 of this chapter and meet the requirements of the Design Manual and Article III of this chapter.
B.Â
The Wicomico County Department of Public Works shall perform a comprehensive
review of the stormwater management plans for each phase of site design.
Coordinated comments will be provided for each plan phase that reflect
input from all appropriate agencies, including, but not limited to,
the Soil Conservation District (SCD) and the Departments of Planning,
Zoning, and Public Works. All comments from Wicomico County and other
appropriate agencies shall be addressed and approval received at each
phase of project design before subsequent submissions.
C.Â
Notification of approval or reasons for disapproval or modification
shall be given to the applicant within 60 days after submission of
the completed stormwater plan. If a decision is not made within 60
days, the applicant shall be informed of the status of the review
process and the anticipated completion date. The stormwater management
plan shall not be considered approved without the inclusion of the
signature and date of signature of the Department of Public Works
on the plan.
D.Â
The approval of a stormwater management plan or grant of a waiver
application shall expire on the date two years from the date of approval
or grant of the waiver. Plans approved prior to the effective date
of May 4, 2010 shall expire on the date three years from such effective
date.
A.Â
The owner/developer shall submit a concept plan that provides sufficient information for an initial assessment of the proposed project and whether stormwater management can be provided according to § 196-14 of this chapter and the Design Manual. Plans submitted for concept approval shall include, but are not limited to:
(1)Â
A map at a scale specified by Wicomico County showing site location,
existing natural features, water and other sensitive resources, topography,
and natural drainage patterns;
(2)Â
The anticipated location of all proposed impervious areas, buildings,
roadways, parking, sidewalks, utilities, and other site improvements;
(3)Â
The location of the proposed limit of disturbance, erodible soils,
steep slopes, and areas to be protected during construction;
(4)Â
Preliminary estimates of stormwater management requirements, the
selection and location of ESD practices to be used, and the location
of all points of discharge from the site;
(5)Â
A narrative that supports the concept design and describes how ESD
will be implemented to the MEP; and
(6)Â
Any other information required by Wicomico County.
B.Â
Following concept plan approval by the Wicomico County Department
of Public Works, the owner/developer shall submit site development
plans that reflect comments received during the previous review phase.
Plans submitted for site development approval shall be of sufficient
detail to allow site development to be reviewed and include but not
be limited to:
(1)Â
All information provided during the concept plan review phase;
(2)Â
Final site layout, exact impervious area locations and acreages,
proposed topography, delineated drainage areas at all points of discharge
from the site, and stormwater volume computations for ESD practices
and quantity control structures;
(3)Â
A proposed erosion and sediment control plan that contains the construction
sequence, any phasing necessary to limit earth disturbances and impacts
to natural resources and an overlay plan showing the types and locations
of ESD and erosion and sediment control practices to be used;
(4)Â
A narrative that supports the site development design, describes
how ESD will be used to meet the minimum control requirements, and
justifies any proposed structural stormwater management measure; and
(5)Â
Any other information required by Wicomico County.
C.Â
Following site development approval by Wicomico County, the owner/developer
shall submit final erosion and sediment control and stormwater management
plans that reflect the comments received during the previous review
phase. Plans submitted for final approval shall be of sufficient detail
to allow all approvals and permits to be issued according to the following:
(1)Â
Final erosion and sediment control plans shall be submitted according
to COMAR 26.17.01.05; and
(2)Â
Final stormwater management plans shall be submitted for approval
in the form of construction drawings and be accompanied by a report
that includes sufficient information to evaluate the effectiveness
of the proposed runoff control design.
D.Â
Reports submitted for final stormwater management plan approval shall
include, but are not limited to:
(1)Â
Geotechnical investigations, including soil maps, borings, site-specific
recommendations, and any additional information necessary for the
final stormwater management design;
(2)Â
Drainage area maps depicting predevelopment and post-development
runoff flow path segmentation and land use;
(3)Â
Hydrologic computations of the applicable ESD and unified sizing
criteria according to the Design Manual for all points of discharge
from the site;
(4)Â
Hydraulic and structural computations for all ESD practices and structural
stormwater management measures to be used;
(5)Â
A narrative that supports the final stormwater management design;
(6)Â
A downstream analysis if deemed necessary by Wicomico County;
(7)Â
A regional stormwater management study if deemed necessary by Wicomico
County; and
(8)Â
Any other information required by Wicomico County.
E.Â
Construction drawings submitted for final stormwater management plan
approval shall include, but are not limited to:
(1)Â
A vicinity map;
(2)Â
Existing and proposed topography and proposed drainage areas, including
areas necessary to determine downstream analysis for proposed stormwater
management facilities;
(3)Â
Any proposed improvements, including location of buildings or other
structures, impervious surfaces, storm drainage facilities, and all
grading;
(4)Â
The location of existing and proposed structures and utilities;
(5)Â
Any easements and rights-of-way;
(6)Â
The delineation, if applicable, of the one-hundred-year floodplain
and any on-site wetlands;
(7)Â
Structural and construction details, including representative cross
sections for all components of the proposed drainage system or systems,
and stormwater management facilities;
(8)Â
All necessary construction specifications;
(9)Â
A sequence of construction;
(10)Â
Data for total site area, disturbed area, new impervious area,
and total impervious area;
(11)Â
A table showing the ESD and unified sizing criteria volumes
required in the Design Manual;
(12)Â
A table of materials to be used for stormwater management facility
planting;
(13)Â
All soil boring logs and locations;
(14)Â
An inspection and maintenance schedule for the ESD system and
each structural device;
(15)Â
Certification by the owner/developer that all stormwater management
construction will be done according to this plan;
(16)Â
An as-built certification signature block to be executed after
project completion; and
(17)Â
Any other information required by Wicomico County.
F.Â
If a stormwater management plan involves direction of some or all
runoff off of the site, it is the responsibility of the developer
to obtain from adjacent property owners any easements or other necessary
property interests concerning flowage of water. Approval of a stormwater
management plan does not create or affect any right to direct runoff
onto adjacent property without that property owner's permission.
A.Â
The design of stormwater management plans shall be prepared by any
individual whose qualifications are acceptable to Wicomico County.
Wicomico County may require that the design be prepared by either
a professional engineer, professional land surveyor, or landscape
architect licensed in the state, as necessary to protect the public
or the environment.
B.Â
If a stormwater BMP requires either a dam safety permit from MDE
or small pond approval from the SCD, Wicomico County shall require
that the design be prepared by a professional engineer licensed in
the state.