A. 
The purpose of this chapter is to protect, maintain, and enhance the public health, safety, and general welfare by establishing minimum requirements and procedures that control the adverse impacts associated with increased stormwater runoff. The goal is to manage stormwater by using environmental site design (ESD) to the maximum extent practicable (MEP) to maintain after development, as nearly as possible, the predevelopment runoff characteristics, and to reduce stream channel erosion, pollution, siltation and sedimentation, and local flooding, and use appropriate structural best management practices (BMPs) only when necessary. This will restore, enhance, and maintain the chemical, physical, and biological integrity of streams, minimize damage to public and private property, and reduce the impacts of land development.
B. 
The provisions of this chapter, pursuant to the Environment Article, Title 4, Subtitle 2, Annotated Code of Maryland, 2009 replacement volume, are adopted under the authority of the Code of the Town of Princess Anne and shall apply to all development occurring within the corporate limits of the Town. The application of this chapter and provisions expressed herein shall be the minimum stormwater management requirements and shall not be deemed a limitation or repeal of any other powers granted by state statute. The Town of Princess Anne shall be responsible for the coordination and enforcement of the provisions of this chapter. This chapter applies to all new and redevelopment projects that have not received final approval for erosion and sediment control and stormwater management plans by May 4, 2010.
For the purpose of this chapter, the following documents are incorporated by reference:
A. 
The 2000 Maryland Stormwater Design Manual, Volumes I and II (Maryland Department of the Environment, April 2000), and all subsequent revisions, is incorporated by reference by the Town and shall serve as the official guide for stormwater management principles, methods, and practices.
B. 
USDA Natural Resources Conservation Service Maryland Conservation Practice Standard Pond Code 378 (January 2000).
A. 
In this section, the following terms have the meanings indicated:
ADMINISTRATIVE WAIVER
(1) 
"Administrative waiver" means a decision by the Town pursuant to this chapter to allow the construction of a development to be governed by the stormwater management ordinance in effect as of May 4, 2009.
(2) 
"Administrative waiver" is distinct from a waiver granted pursuant to § 133-6 of this chapter.
APPROVAL
(1) 
"Approval" means a documented action by the Town following a review to determine and acknowledge the sufficiency of submitted material to meet the requirements of a specified stage in the Town's development review process.
(2) 
"Approval" does not mean an acknowledgement by the Town that submitted material has been received for review.
FINAL PROJECT APPROVAL
(1) 
"Final project approval" means approval of the final stormwater management plan and erosion and sediment control plan required to construct a project's stormwater management facilities.
(2) 
"Final project approval" also includes securing bonding or financing for final development plans if either is required as a prerequisite for approval.
PRELIMINARY PROJECT APPROVAL
An approval as part of the Town's preliminary development or planning review process that includes, at a minimum:
(1) 
The number of planned dwelling units or lots;
(2) 
The proposed project density;
(3) 
The proposed size and location of all land uses for the project;
(4) 
A plan that identifies:
(a) 
The proposed drainage patterns;
(b) 
The location of all points of discharge from the site; and
(c) 
The type, location, and size of all stormwater management measures based on site-specific stormwater management requirement computations; and
(5) 
Any other information required by the Town, including, but not limited to:
(a) 
The proposed alignment, location, and construction type and standard for all roads, accessways, and areas of vehicular traffic;
(b) 
A demonstration that the methods by which the development will be supplied with water and wastewater service are adequate; and
(c) 
The size, type, and general location of all proposed wastewater and water system infrastructure.
B. 
The Town may grant an administrative waiver to a development that received a preliminary project approval prior to May 4, 2010. Administrative waivers expire according to Subsection C of this section and may be extended according to Subsection D of this section.
C. 
Expiration of administrative waivers.
(1) 
Except as provided for in Subsection D(2) of this section, an administrative waiver shall expire on:
(a) 
May 4, 2013, if the development does not receive final project approval prior to that date; or
(b) 
May 4, 2017, if the development receives final project approval prior to May 4, 2013.
(2) 
All construction authorized pursuant to an administrative waiver must be completed by May 4, 2017, or, if the waiver is extended as provided in Subsection D of this section, by the expiration date of the waiver extension.
D. 
Extension of administrative waivers.
(1) 
Except as provided in Subsection D(2) of this section, an administrative waiver shall not be extended.
(2) 
An administrative waiver may only be extended if, by May 4, 2010, the development:
(a) 
Has received a preliminary project approval; and
(b) 
Was subject to a development rights and responsibilities agreement, a tax increment financing approval, or an annexation agreement.
(3) 
Administrative waivers extended according to Subsection D(2) of this section shall expire when the development rights and responsibilities agreement, the tax increment financing approval, or the annexation agreement expires.
The following definitions are provided for the terms used in this chapter:
ADMINISTRATION
The Maryland Department of the Environment (MDE) Water Management Administration (WMA).
ADVERSE IMPACT
Any deleterious effect on waters or wetlands, including their quality, quantity, surface area, species composition, aesthetics or usefulness for human or natural uses which is or may potentially be harmful or injurious to human health, welfare, safety or property, to biological productivity, diversity, or stability or which unreasonably interferes with the enjoyment of life or property, including outdoor recreation.
AGRICULTURAL LAND MANAGEMENT PRACTICES
Those methods and procedures used in the cultivation of land in order to further crop and livestock production and conservation of related soil and water resources.
APPLICANT
Any person, firm, or governmental agency who or which executes the necessary forms to procure official approval of a project or a permit to carry out construction of a project.
APPROVING AGENCY
The entity responsible for the review and approval of stormwater management plans.
AQUIFER
A porous water-bearing geologic formation generally restricted to materials capable of yielding an appreciable supply of water.
BEST MANAGEMENT PRACTICE (BMP)
A structural device or nonstructural practice designed to temporarily store or treat stormwater runoff in order to mitigate flooding, reduce pollution, and provide other amenities.
CHANNEL PROTECTION STORAGE VOLUME (CPV)
The volume used to design structural management practices to control stream channel erosion. Methods for calculating the channel protection storage volume are specified in the 2000 Maryland Stormwater Design Manual.
CLEARING
The removal of trees and brush from the land, but shall not include the ordinary mowing of grass, grading, grubbing or other earth disturbance.
CONCEPT PLAN
The first of three required plan approvals that includes the information necessary to allow an initial evaluation of a proposed project.
DESIGN MANUAL
The 2000 Maryland Stormwater Design Manual, and all subsequent revisions, that serves as the official guide for stormwater management principles, methods, and practices.
DETENTION STRUCTURE
A permanent structure for the temporary storage of runoff which is designed so as not to create a permanent pool of water.
DEVELOP LAND
To change the runoff characteristics of a parcel of land in conjunction with residential, commercial, industrial, or institutional construction or alteration.
DIRECT DISCHARGE
The concentrated release of stormwater to tidal waters or vegetated tidal wetlands from new development or redevelopment projects in the critical area.
DRAINAGE AREA
That area contributing runoff to a single point measured in a horizontal plane, which is enclosed by a ridgeline.
EASEMENT
A grant or reservation by the owner of land for the use of such land by others for a specific purpose or purposes, and which must be included in the conveyance of land affected by such easement.
ENVIRONMENTAL SITE DESIGN (ESD)
Using small-scale stormwater management practices, nonstructural techniques, and better site planning to mimic natural hydrologic runoff characteristics and minimize the impact of land development on water resources. Methods for designing ESD practices are specified in the Design Manual.
EXEMPTION
Those land development activities that are not subject to the stormwater management requirements contained in this chapter.
EXTENDED DETENTION
A stormwater design feature that provides gradual release of a volume of water in order to increase settling of pollutants and protect downstream channels from frequent storm events. Methods for designing extended detention BMPs are specified in the Design Manual.
EXTREME FLOOD VOLUME (Qf)
The storage volume required to control those infrequent but large storm events in which overbank flows reach or exceed the boundaries of the one-hundred-year floodplain.
FINAL STORMWATER MANAGEMENT PLAN
The last of three required plan approvals that includes the information necessary to allow all approvals and permits to be issued by the approving agency.
FLOW ATTENUATION
Prolonging the flow time of runoff to reduce the peak discharge.
GRADING
Any act by which soil is cleared, stripped, stockpiled, excavated, scarified, filled, or any combination thereof.
IMPERVIOUS AREA
Any surface that does not allow stormwater to infiltrate into the ground.
IN-FILL DEVELOPMENT
Any new development on a lot located within a previously developed area.
INFILTRATION
The passage or movement of water into the soil surface.
MAXIMUM EXTENT PRACTICABLE (MEP)
Designing stormwater management systems so that all reasonable opportunities for using ESD planning techniques and treatment practices are exhausted and, only where absolutely necessary, a structural BMP is implemented.
MINOR SUBDIVISION
The division of a single lot, tract or parcel of land into five or fewer additional lots, tracts, or parcels of land for the purpose, whether immediate or future, of transfer of ownership or of building development, provided the lots, tracts or parcels of land thereby created have frontage on an improved community street or streets or on an approved private road or street, and provided further that there is not created by the subdivision any new street or streets.
OFF-SITE STORMWATER MANAGEMENT
The design and construction of a facility necessary to control stormwater from more than one development.
ON-SITE STORMWATER MANAGEMENT
The design and construction of systems necessary to control stormwater within an immediate development.
OVERBANK FLOOD PROTECTION VOLUME (Qp)
The volume controlled by structural practices to prevent an increase in the frequency of out-of-bank flooding generated by development. Methods for calculating the overbank flood protection volume are specified in the Design Manual.
PERSON
The federal government, the state, any county, municipal corporation, or other political subdivision of the state, or any of their units, or an individual receiver, trustee, guardian, executor, administrator, fiduciary, or representative of any kind, or any partnership, firm, association, public or private corporation, or any other entity.
PLANNING TECHNIQUES
A combination of strategies employed early in project design to reduce the impact from development and to incorporate natural features into a stormwater management plan.
RECHARGE VOLUME (Rev)
That portion of the water quality volume used to maintain groundwater recharge rates at development sites. Methods for calculating the recharge volume are specified in the Design Manual.
REDEVELOPMENT
Any construction, alteration, or improvement performed on sites where existing land use is commercial, industrial, institutional, or multifamily residential and existing site impervious area exceeds 40%.
RETENTION STRUCTURE
A permanent structure that provides for the storage of runoff by means of a permanent pool of water.
RETROFITTING
The implementation of ESD practices, the construction of a structural BMP, or the modification of an existing structural BMP in a previously developed area to improve water quality over current conditions.
SEDIMENT
Soils or other surficial materials transported or deposited by the action of wind, water, ice, or gravity as a product of erosion.
SITE
Any tract, lot, or parcel of land, or portion thereof, or combination of tracts, lots, parcels of land that are in one ownership, or are contiguous and in diverse ownership, where development is to be performed as part of a unit, subdivision, or project.
SITE DEVELOPMENT PLAN
The second of three required plan approvals that includes the information necessary to allow a detailed evaluation of a proposed project.
STABILIZATION
The prevention of soil movement by any of various vegetative and/or structural means.
STANDARD PLAN
A simplified stormwater management plan that addresses stormwater management for a single-family residential lot through nonstructural practices, on a form approved by the Town's Code Compliance Director. See § 133-6G.
STORMWATER
Water that originates from a precipitation event.
STORMWATER MANAGEMENT SYSTEM
Natural areas, ESD practices, stormwater management measures, and any other structure through which stormwater flows, infiltrates, or discharges from a site.
STRIPPING
Any activity that removes the vegetative surface cover, including tree removal, clearing, grubbing, and storage or removal of topsoil.
TOWN
The President and Commissioners of Princess Anne.
VARIANCE
The modification of the minimum stormwater management requirements for specific circumstances such that strict adherence to the requirements would result in unnecessary hardship and not fulfill the intent of this chapter.
WAIVER
The reduction of stormwater management requirements by the Town for a specific development on a case-by-case review basis.
WATERCOURSE
Any natural or artificial stream, river, creek, ditch, channel, canal, conduit, culvert, drain, waterway, gully, ravine or wash, in and including any adjacent area that is subject to inundation from overflow or floodwater.
WATER QUALITY VOLUME (WQv)
The volume needed to capture and treat 90% of the average annual rainfall events at a development site. Methods for calculating the water quality volume are specified in the Design Manual.
WATERSHED
The total drainage area contributing runoff to a single point.