Morrisville Unified Development Ordinance - February 2021.2

Article 7: Stormwater Management Section 7.1. General Provisions 7.1.3. Authority

3. Establishing minimum post-development stormwater management standards and design criteria for the regulation and control of stormwater runoff quantity and quality; 4. Establishing design and review criteria for the construction, function, and use of structural stormwater best management practices (BMPs) that may be used to meet the minimum post-development stormwater management standards; 5. Encouraging the use of better management and site design practices, such as the use of vegetated conveyances for stormwater and the preservation of greenspace, riparian buffers, and other conservation areas to the maximum extent practicable; 6. Establishing provisions for the long-term responsibility for and maintenance of structural and nonstructural stormwater BMPs to ensure that they continue to function as designed, are maintained appropriately, and pose no threat to public safety; 7. Establishing administrative procedures for the submission, review, approval and disapproval of stormwater management plans, for the inspection of approved projects, and to assure appropriate long-term maintenance. 8. Controlling illicit discharges into the municipal separate stormwater system. Authority The Morrisville Town Council is authorized to adopt this article pursuant to North Carolina law, including but not limited to Article 14, Section 5 of the Constitution of North Carolina; North Carolina General Statutes Chapter 143-214.7 and rules promulgated by the Environmental Management Commission thereunder; Chapter 143-215.6A; Session Laws 2009-216, 2009-484; Chapter 153A-454; Chapter 160A, § 174, 185, 459. A. General Beginning with and subsequent to its effective date, this article shall be applicable to all development and redevelopment—including, but not limited to, applications for Site Plan Approval, Subdivision Approval, Construction Plan Approval, and grading approval—unless exempt pursuant to this article. B. Implementation As per Session Law (SL) 2015-241 and SL 2015-246, implementation of 7.3.2 and 7.3.5 of this Article are temporarily suspended until August 10, 2020. C. Exemptions 1. Single-family detached, duplex, and manufactured home dwellings and recreational development and redevelopment that cumulatively disturbs less than one acre and are not part of a larger common plan of development or sale are exempt from the provisions of this article. 2. Commercial, industrial, institutional, single-family attached and multifamily residential, or local government development and redevelopment that cumulatively disturbs less than one-half acre and are not part of a larger common plan of development or sale are exempt from the provisions of this article. 3. Development and redevelopment that disturbs less than the above thresholds are not exempt if such activities are part of a larger common plan of development or sale and the larger common plan exceeds the relevant threshold, even though multiple, separate, or distinct activities take place at different times on different schedules. 7.1.3. 7.1.4. Applicability and Jurisdiction

Morrisville, NC

February 1, 2021

Unified Development Ordinance

Page 7-2