Morrisville Unified Development Ordinance - May 2020

ARTICLE 7: STORMWATER MANAGEMENT....................................................................................7-1 Section 7.1. General Provisions........................................................................................................ 7-1

7.1.1. Findings....................................................................................................................................................................... 7-1

7.1.2. Purpose ....................................................................................................................................................................... 7-1

7.1.3. Authority..................................................................................................................................................................... 7-2

7.1.4. Applicability and Jurisdiction .................................................................................................................................. 7-2

7.1.5. Map............................................................................................................................................................................. 7-3

7.1.6. Design Manual........................................................................................................................................................... 7-3 Section 7.2. Administration and Procedures...................................................................................... 7-4 7.2.1. Stormwater Administrator........................................................................................................................................ 7-4

7.2.2. Review Procedures.................................................................................................................................................... 7-5

7.2.3. Applications for Approval ....................................................................................................................................... 7-6

7.2.4. Approvals ................................................................................................................................................................... 7-8

7.2.5. Stormwater Variances.............................................................................................................................................. 7-8

7.2.6. Appeals ...................................................................................................................................................................... 7-9

Section 7.3. Standards ..................................................................................................................... 7-9 7.3.1. General Standards ................................................................................................................................................... 7-9

7.3.2. Nitrogen and Phosphorus Loading .......................................................................................................................7-10

7.3.3. Nitrogen and Phosphorus Standard Is Supplemental; Total Suspended Solids (TSS) Removal ..................7-10

7.3.4. Control and Treatment of Runoff Volume............................................................................................................7-10

7.3.5. Partial Offset of Nutrient Control Requirements ................................................................................................7-10

7.3.6. Evaluation of Standards for Stormwater Control Measures.............................................................................7-11

7.3.7. Dedication of BMPs, Facilities, and Improvements .............................................................................................7-11

Section 7.4. Maintenance............................................................................................................... 7-12 7.4.1. General Standards fo r Maintenance...................................................................................................................7-12

7.4.2. Operation and Maintenance Agreement............................................................................................................7-12

7.4.3. Inspection Program .................................................................................................................................................7-14

7.4.4. Performance Security for Installation and Performance ...................................................................................7-14

7.4.5. Notice to Owners ....................................................................................................................................................7-15

7.4.6. Records of Installation and Maintenance Activities............................................................................................7-15

7.4.7. Nuisance ...................................................................................................................................................................7-15

7.4.8. Maintenance Easement...........................................................................................................................................7-15

Section 7.5. Enforcement and Violations......................................................................................... 7-16 7.5.1. General ....................................................................................................................................................................7-16

7.5.2. Remedies and Penalties.........................................................................................................................................7-16

7.5.3. Procedures................................................................................................................................................................7-17 Section 7.6. Illicit Discharges and Connections ............................................................................... 7-18 7.6.1. Illicit Discharges .......................................................................................................................................................7-18

7.6.2. Illicit Connections .....................................................................................................................................................7-19

7.6.3. Spills..........................................................................................................................................................................7-20

7.6.4. Nuisance ...................................................................................................................................................................7-20

7.6.5. Enforcement..............................................................................................................................................................7-20