CHAPTER 151: STORMWATER MANAGEMENT

Section

General Provisions

   151.001   Purpose; authority; disclaimer of liability

   151.002   Incorporation by reference

   151.003   Definitions

Applicability

   151.015   Scope

   151.016   Exemptions

   151.017   Application for exemption

   151.018   Waivers; watershed management plans

   151.019   Redevelopment

   151.020   Variances

Stormwater Management Criteria

   151.035   Minimum control requirements

   151.036   Stormwater management measures

Stormwater Management Plans

   151.050   Specific design criteria

   151.051   Review and approval of stormwater management plans

   151.052   Contents and submission of stormwater management plans

   151.053   Preparation of the stormwater management plan

Permits

   151.065   Permit requirements

   151.066   Fees

   151.067   Stormwater Management Fund

   151.068   Permit suspension and revocation

   151.069   Approval conditions

Security

   151.080   Security

Inspections

   151.095   Inspection schedule and reports

   151.096   Inspection requirements during construction

Maintenance

   151.110   Maintenance inspections

   151.111   Stormwater Management Deed of Easement and Maintenance Agreement

   151.112   Maintenance responsibility

Administration and Enforcement

   151.125   Enforcement

   151.126   Appeals

   151.999   Penalty

Cross-reference:

   Environmental Management of Storm Sewer Systems, see Chapter 53

GENERAL PROVISIONS

§ 151.001 PURPOSE; AUTHORITY; DISCLAIMER OF LIABILITY.

   (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 to 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 help restore, enhance, and maintain the chemical, physical, and biological integrity of streams, minimize damage to public and private property, and reduce impacts of land development.

   (B)   This chapter is adopted pursuant to the Md. Code, Environment Article, Title 4, Subtitle 2, and shall apply to all development occurring within the unincorporated areas of the county. The application of this chapter shall be the minimum stormwater management (SWM) requirements and shall not be deemed a limitation or repeal of any other powers granted by state statute. This county shall be responsible for the coordination and enforcement of this chapter.

   (C)   The degree of stormwater management (SWM) necessary to satisfy the requirements of this chapter is considered reasonable to regulate the effects of stormwater runoff on the receiving land and water:

      (1)   Quantity - overbank flood control (Qp10);

      (2)   Bank erosion - stream capacity (Cpv);

      (3)   Quality - waterborne pollutants (WQv); and

      (4)   Local groundwater table - groundwater recharge (Rev).

   (D)   The amount of protection required is based upon state law, scientific study, and local engineering experience.

   (E)   Rainfall events beyond the capacity of management measures provided to satisfy this chapter have occurred in the past and may occur in the future. The severity of these events and their effects may be increased by man-made or natural causes.

   (F)   Implementation of the provisions of this chapter does not create liability on the part of the county or any officer or employee thereof for any damage that may result from reliance on this chapter.

(2004 Code, § 191-1) (Ord. 01-12, passed 9-27-2001; Ord. 04-07, passed 4-1-2004; Ord. 07-08, passed 5-3-2007; Ord. 2010-05, passed 4-29-2010)

§ 151.002 INCORPORATION BY REFERENCE.

   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 shall serve as the official guide for stormwater principles, methods, and practices;

   (B)   United States Department of Agriculture (USDA) Natural Resources Conservation Service Maryland Conservation Practice Standard Pond Code 378 (January, 2000); and

   (C)   The Carroll County Supplement to the 2000 Maryland Stormwater Design Manual, Volumes I and II, Carroll County Bureau of Resource Management, May, 2010, November, 2018, as amended.

(2004 Code, § 191-2) (Ord. 01-12, passed 9-27-2001; Ord. 04-07, passed 4-1-2004; Ord. 07-08, passed 5-3-2007; Ord. 2010-05, passed 4-29-2010; Ord. 2018-11, passed 11-29-2018)